<Table> <S> <C> Table of Contents OVERVIEW LETTER TO SHAREHOLDERS 1 ECONOMIC SNAPSHOT 2 PERFORMANCE SUMMARY RETURN HIGHLIGHTS 4 PORTFOLIO AT A GLANCE SIX-MONTH DIVIDEND HISTORY 6 ASSET ALLOCATION 6 COUPON DISTRIBUTION 6 Q&A WITH YOUR PORTFOLIO MANAGERS 7 GLOSSARY OF TERMS 10 BY THE NUMBERS YOUR FUND'S INVESTMENTS 11 FINANCIAL STATEMENTS 15 NOTES TO FINANCIAL STATEMENTS 21 VAN KAMPEN INVESTMENTS THE VAN KAMPEN FAMILY OF FUNDS 32 BOARD OF TRUSTEES AND IMPORTANT ADDRESSES 33 </Table> Promising economic signs have appeared on the horizon. This report must be preceded or accompanied by a prospectus for the fund being offered. NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE OVERVIEW LETTER TO SHAREHOLDERS April 19, 2002 Dear Shareholder, In recent months, promising economic signs have appeared on the horizon. While it may be too soon to declare an end to the recession, it's never too soon to discuss diversification and long-term investment strategies. Over the years, we've used our generations of experience to help investors like you pursue their financial goals. Whether you're planning for your future, or for your family's, we encourage you to consider including a variety of stock and fixed-income funds in your portfolio. We believe an appropriately diversified portfolio, one which includes a balanced mix of investments, may help smooth out the effects of the market's fluctuations--and, as such, may help improve your portfolio's long-term performance. While no portfolio is immune to volatility, your advisor can help you structure a portfolio designed to address your long-term financial goals. Be sure to discuss your situation with your advisor before investing. Thank you for your continued trust in Van Kampen. We appreciate the opportunity to help you and your loved ones enjoy life's true wealth--family, friends and life's daily pleasures. Sincerely, [SIG] Richard F. Powers, III President and CEO Van Kampen Asset Management Inc. 1 ECONOMIC SNAPSHOT THE ECONOMY THE ECONOMIC DATA RELEASED IN MARCH WAS UNAMBIGUOUS--THE U.S. ECONOMY SEEMED BETTER POSITIONED TO RESUME TREND GROWTH THAN MOST FORECASTERS HAD PREDICTED. SURPRISINGLY STRONG DATA, RANGING FROM PAYROLL GROWTH TO INVENTORY RESTOCKING, GENERATED A CHORUS OF UPWARD REVISIONS TO PROJECTIONS OF FIRST-QUARTER GROWTH IN THE GROSS DOMESTIC PRODUCT. ON THE HEELS OF THIS INCREASINGLY OPTIMISTIC NEWS, THE CAPITAL MARKETS REACTED POSITIVELY--STOCK AND COMMODITY PRICES ROSE WHILE BOND PRICES FELL. THE FEDERAL RESERVE BOARD'S OPEN MARKET COMMITTEE (FOMC) ACKNOWLEDGED IN ITS MARCH 19 MONETARY POLICY DIRECTIVE, "INFORMATION THAT HAS BECOME AVAILABLE SINCE THE LAST MEETING OF THE COMMITTEE INDICATES THAT THE ECONOMY, BOLSTERED BY A MARKED SWING IN INVENTORY INVESTMENT, IS EXPANDING AT A SIGNIFICANT PACE." FOLLOWING THIS STATEMENT, IT CAME AS NO SURPRISE TO MOST INVESTORS WHEN THE FOMC ANNOUNCED IT WOULD NOT CHANGE INTEREST RATES DURING ITS MARCH MEETING. DURING 2001, THE FED CUT INTEREST RATES 11 TIMES--BRINGING THE FEDERAL FUNDS RATE TO 1.75 PERCENT, A 40-YEAR LOW. 2 U.S. GROSS DOMESTIC PRODUCT SEASONALLY ADJUSTED ANNUALIZED RATES (March 31, 2000--March 31, 2002) [BAR GRAPH] <Table> <Caption> U.S. GROSS DOMESTIC PRODUCT --------------------------- <S> <C> Mar 00 4.80 Jun 00 5.70 Sep 00 1.30 Dec 00 1.90 Mar 01 1.30 Jun 01 0.30 Sep 01 -1.30 Dec 01 1.70 Mar 02 5.80 </Table> Source: Bureau of Economic Analysis INTEREST RATES AND INFLATION (March 31, 2000--March 31, 2002) [LINE GRAPH] <Table> <Caption> INTEREST RATES INFLATION -------------- --------- <S> <C> <C> Mar 00 6.00 3.80 6.00 3.10 6.50 3.20 Jun 00 6.50 3.70 6.50 3.70 6.50 3.40 Sep 00 6.50 3.50 6.50 3.40 6.50 3.40 Dec 00 6.50 3.40 5.50 3.70 5.50 3.50 Mar 01 5.00 2.90 4.50 3.30 4.00 3.60 Jun 01 3.75 3.20 3.75 2.70 3.50 2.70 Sep 01 3.00 2.60 2.50 2.10 2.00 1.90 Dec 01 1.75 1.60 1.75 1.10 1.75 1.10 Mar 02 1.75 1.50 </Table> Interest rates are represented by the closing midline federal funds target rate on the last day of each month. Inflation is indicated by the annual percentage change of the Consumer Price Index for all urban consumers at the end of each month. Source: Bloomberg 3 PERFORMANCE SUMMARY RETURN HIGHLIGHTS (as of March 31, 2002) <Table> <Caption> A SHARES B SHARES C SHARES ------------------------------------------------------------------------- <S> <C> <C> <C> <C> Six-month total return based on NAV(1) -0.37% -0.81% -0.71% ------------------------------------------------------------------------- Six-month total return(2) -5.11% -4.68% -1.68% ------------------------------------------------------------------------- One-year total return(2) -0.62% -0.49% 2.59% ------------------------------------------------------------------------- Five-year average annual total return(2) 5.66% 5.65% 5.91% ------------------------------------------------------------------------- Ten-year average annual total return(2) 5.69% 5.73%(3) N/A ------------------------------------------------------------------------- Life-of-Fund average annual total return(2) 7.54% 5.51%(3) 4.75% ------------------------------------------------------------------------- Commencement date 07/16/84 12/20/91 03/10/93 ------------------------------------------------------------------------- Distribution Rate(4) 4.30% 3.76% 3.77% ------------------------------------------------------------------------- SEC Yield(5) 5.56% 5.08% 5.10% ------------------------------------------------------------------------- </Table> N/A = Not Applicable (1) Assumes reinvestment of all distributions for the period and does not include payment of the maximum sales charge (4.75% for Class A Shares) or contingent deferred sales charge (CDSC) for Class B and Class C Shares. On purchases of Class A Shares of $1 million or more, a CDSC of 1% may be imposed on certain redemptions made within one year of purchase. Returns for Class B Shares are calculated without the effect of the maximum 4% CDSC, charged on certain redemptions made within the first and second years of purchase and declining to 0% after the fifth year. Returns for Class C Shares are calculated without the effect of the maximum 1% CDSC, charged on certain redemptions made within one year of purchase. If the sales charges were included, total returns would be lower. These returns include combined Rule 12b-1 fees and service fees of up to .25% for Class A Shares and 1% for Class B and Class C Shares and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. 4 (2) Assumes reinvestment of all distributions for the period and includes payment of the maximum sales charge (4.75% for Class A Shares) or CDSC for Class B and Class C Shares and combined Rule 12b-1 fees and service fees. On purchases of Class A Shares of $1 million or more, a CDSC of 1% may be imposed on certain redemptions made within one year of purchase. Returns for Class B Shares are calculated with the effect of the maximum 4% CDSC, charged on certain redemptions made within the first and second years of purchase and declining to 0% after the fifth year. Returns for Class C Shares are calculated with the effect of the maximum 1% CDSC, charged on certain redemptions made within one year of purchase. The combined Rule 12b-1 fees and service fees for Class A Shares is up to .25% and for Class B and Class C Shares is 1%. The returns above do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. (3) Reflects the conversion of Class B Shares into Class A Shares six years after the end of the calendar month in which the shares were purchased. See footnote 3 in the Notes to Financial Statements for additional information. (4) Distribution rate represents the monthly annualized distributions of the Fund at the end of the period and not the earnings of the Fund. (5) SEC Yield is a standardized calculation prescribed by the Securities and Exchange Commission for determining the amount of net income a portfolio should theoretically generate for the 30-day period ended March 31, 2002. See the Comparative Performance section of the current prospectus. An investment in the Fund is subject to investment risks, and you could lose money on your investment in the Fund. Please review the Risk/Return Summary of the Prospectus for further details on investment risks. Past performance is no guarantee of future results. Investment returns and principal value will fluctuate and fund shares, when redeemed, may be worth more or less than their original cost. As a result of recent market activity, current performance may vary from the figures shown. For more up-to-date information, please visit vankampen.com or speak with your financial advisor. Fund shares are neither insured nor guaranteed by the U.S. Government. Market forecasts provided in this report may not necessarily come to pass. 5 PORTFOLIO AT A GLANCE SIX-MONTH DIVIDEND HISTORY (for the six months ending March 31, 2002) [BAR GRAPH] <Table> <Caption> DIVIDENDS SPECIAL INCOME DIVIDENDS --------- ------------------------ <S> <C> <C> 10/01 0.0425 11/01 0.0425 12/01 0.0425 0.0275 1/02 0.0425 2/02 0.0380 3/02 0.0380 </Table> The dividend history represents dividends that were paid on the fund's Class A shares and is no guarantee of the fund's future dividends. ASSET ALLOCATION (as a percentage of long-term investments) [BAR GRAPH] <Table> <Caption> MARCH 31, 2002 SEPTEMBER 30, 2001 -------------- ------------------ <S> <C> <C> U.S. Treasuries 70.00 39.00 FNMA 16.00 31.00 GNMA 9.00 10.00 FHLMC 5.00 18.00 FHL Bank 0.00 2.00 </Table> COUPON DISTRIBUTION (as a percentage of long-term investments--March 31, 2002) [BAR GRAPH] <Table> <Caption> COUPON DISTRIBUTION ------------------- <S> <C> less than 6.0% 2.60 6-6.9% 57.20 7-7.9% 12.90 8-8.9% 15.00 9-9.9% 5.40 10% or more 6.90 </Table> 6 Q&A WITH YOUR PORTFOLIO MANAGERS WE RECENTLY SPOKE WITH THE PORTFOLIO MANAGEMENT TEAM FOR THE VAN KAMPEN GOVERNMENT SECURITIES FUND ABOUT THE KEY EVENTS AND ECONOMIC FORCES THAT SHAPED THE MARKETS AND INFLUENCED THE FUND'S RETURN DURING THE SIX-MONTH PERIOD ENDED MARCH 31, 2002. THE FUND IS MANAGED BY THE ADVISER'S HIGH GRADE TEAM. CURRENT MEMBERS OF THE TEAM(1) INCLUDE W. DAVID ARMSTRONG, MANAGING DIRECTOR; PAUL F. O'BRIEN, EXECUTIVE DIRECTOR; AND DAVID HOROWITZ, VICE PRESIDENT. THE FOLLOWING DISCUSSION REFLECTS THEIR VIEWS ON THE FUND'S PERFORMANCE. (1) Team members may change at any time without notice. Q WHAT WAS THE MARKET ENVIRONMENT OF THE PAST SIX MONTHS, AND HOW DID THE FUND PERFORM IN THAT ENVIRONMENT? A The period was marked by a return to more normal conditions following the market chaos that ensued after September. This was particularly true for the high-quality paper in which the fund invests, since it isn't typically affected by concerns of credit quality. Investors' initial reaction in the first part of the period was to seek out the perceived safety of U.S. Treasury bonds. This flight to quality drove interest rates down, particularly in the short end of the yield curve, and took the yield on the 10-year note down to a low of 4.18 percent in early November. Shortly after that, the market began to be more optimistic about the future path of the economy. The yield curve, which had been aggressively steepened by the flight to quality earlier in the period, began to flatten as investors unwound their longer-term Treasury positions. This drove interest rates up at the intermediate and long portions of the yield curve, with the greatest change occurring in the intermediate area. Mortgage-backed securities turned in a strong performance over the period. Their performance was driven by a number of factors, including increased investor demand for high-quality paper without credit risk. The sector was also helped by a sustained decline in volatility in the fixed-income market over the period to more normal levels. We believe this drop in volatility helped to make mortgage securities, which often suffer adverse effects from volatility, more attractive. Finally, rising interest rates helped reduce homeowners' incentives to refinance their mortgages. This reduced incentive provided further stability to the mortgage-backed securities market. Agency paper continued to be highly priced over the period. Like mortgage bonds, agencies experienced increased demand from investors who 7 wanted to earn more yield than they could with Treasuries without having to be exposed to credit risk. The fund continued to provide shareholders with what we believe is an attractive level of income, as its monthly dividend of $0.0380 per Class A share translates to a distribution rate of 4.30 percent based on the fund's maximum offering price as of March 31, 2002. For the six-month period ended March 31, 2002, the fund generated a total return of -0.37 percent. Performance information for the fund reflects Class A shares at net asset value including combined Rule 12b-1 fees and service fees of up to 0.25 percent and excluding a maximum sales charge of 4.75 percent; if the maximum sales charge were included, the return would be lower. The return above does not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. Of course, past performance is no guarantee of future results. Performance of other share classes will vary. Investment return and principal value will fluctuate and fund shares, when redeemed, may be worth more or less than their original cost. As a result of recent market activity, current performance may vary from the figures shown. For more up-to-date information, please visit vankampen.com or speak with your financial advisor. By comparison, the Lehman Brothers Mutual Fund Government/Mortgage Index posted a total return of -0.05 percent for the same period. This index is a broad-based, unmanaged index comprised of U.S. government treasuries and agency mortgage-backed securities. Index returns do not include any sales charges or fees that would be paid by an investor purchasing the securities they represent. Such costs would lower performance. It is not possible to invest directly in an index. For additional performance results, please refer to the chart and footnotes on page 4. Q WHAT STRATEGIES DID YOU PURSUE IN THIS ENVIRONMENT? A We believed that apparent investor preference for the relative safety of government bonds drove interest rates too low during the earlier part of the period. As a result, we kept the fund's duration significantly shorter than that of its benchmark index (the Lehman Brothers Mutual Fund Government/Mortgage Index) until interest rates began to rise. As that process unfolded, we systematically lengthened the fund's duration to take advantage of rising yields. By the end of the period, the fund's duration approximated that of its benchmark. In order to keep the fund's duration short during the early part of the period, we emphasized the intermediate part of the yield curve. We slowly reduced the portfolio's exposure to that part of the curve as we shortened its duration. We believe this move helped to insulate the fund from much of the negative impact of rising intermediate rates. At the sector level, the fund maintained a consistent overweighting to mortgage-backed securities throughout the period relative to its benchmark. Our strategy within the sector was to emphasize both lower-coupon paper as well as higher-coupon paper in order to keep its exposure balanced. We underweighted bonds 8 with coupons that we believed put them at greatest risk of refinancing. Our strongest preference was for paper backed by FNMA (Federal National Mortgage Association). While we maintained the fund's overall overweight in mortgage-backed securities, we did move to capture the sector's outperformance by selling some positions. This reduced the portfolio's position to a modest overweighting by the end of the period. Q WHAT IS YOUR OUTLOOK FOR THE MARKET? A Our outlook for the economy is constructive, and we expect the recovery to continue to gather steam in 2002. As a result, we agree with the market's prediction that interest rates are likely to rise. The curve traditionally flattens in such times, with yields rising most rapidly on the short end as the Federal Reserve raises rates, and we expect that pattern to hold true in the coming months. At the sector level, we believe that mortgage-backed securities still offer reasonable value. That said, we don't feel that the sector offers as compelling a value as it did in the fall of 2001. For the time being, we plan to maintain the fund's barbell structure between higher and lower coupons in the belief that this structure should provide the fund with the potential for a healthy yield as well as reasonable price stability. ANNUAL HOUSEHOLDING NOTICE To reduce fund expenses, the fund attempts to eliminate duplicate mailings to the same address. The fund delivers a single copy of certain shareholder documents to investors who share an address, even if the accounts are registered under different names. The fund's prospectuses and shareholder reports will be delivered to you in this manner indefinitely unless you instruct us otherwise. You can request multiple copies of these documents by either calling (800) 341-2911 or writing to Van Kampen Investor Services at 1 Parkview Plaza, P.O. Box 5555, Oakbrook Terrace, IL 60181. Once Investor Services has received your instructions, we will begin sending individual copies for each account within 30 days. 9 GLOSSARY OF TERMS A HELPFUL GUIDE TO SOME OF THE COMMON TERMS YOU'RE LIKELY TO SEE IN THIS REPORT AND OTHER FINANCIAL PUBLICATIONS. DURATION: A measure of the sensitivity of a bond's price to changes in interest rates, expressed in years. Each year of duration represents an expected 1 percent change in the price of a bond for every 1 percent change in interest rates. The longer a bond's duration, the greater the effect of interest-rate movements on its price. Typically, funds with shorter durations perform better in rising-rate environments, while funds with longer durations perform better when rates decline. FEDERAL RESERVE BOARD (THE FED): The governing body of the Federal Reserve System, which is the central bank of the United States. Its policy-making committee, called the Federal Open Market Committee, meets at least eight times a year to establish monetary policy and monitor the economic pulse of the United States. FLIGHT TO QUALITY: The flow of funds toward potentially "safer" investments in times of marketplace uncertainty or fear. MORTGAGE-BACKED SECURITIES: Securities backed by pools of similar mortgages. These securities are generally issued by agencies of the U.S. government, such as Government National Mortgage Association (GNMA, or "Ginnie Mae") and Federal Home Loan Mortgage Corporation (FHLMC, or "Freddie Mac"). YIELD: The annual rate of return on an investment, expressed as a percentage. YIELD CURVE: The pattern that results from viewing the yields of U.S. Treasury securities maturing in 1, 5, 10, and 30 years. When grouped together and graphed, a pattern of increasing yield is often reflected as the time to maturity extends. This pattern creates an upward sloping "curve." A "flat" yield curve represents little difference between short- and long-term interest rates, while a "negative" yield curve represents decreasing yields as the time to maturity extends. YIELD SPREAD: The additional yield investors can earn by either investing in bonds with longer maturities or by investing in bonds with lower credit ratings. The spread is the difference in yield between bonds with short versus long maturities or the difference in yield between high-quality bonds and lower-quality bonds. 10 BY THE NUMBERS YOUR FUND'S INVESTMENTS March 31, 2002 (Unaudited) THE FOLLOWING PAGES DETAIL YOUR FUND'S PORTFOLIO OF INVESTMENTS AT THE END OF THE REPORTING PERIOD. <Table> <Caption> PAR AMOUNT MARKET (000) DESCRIPTION COUPON MATURITY VALUE <C> <S> <C> <C> <C> COLLATERALIZED MORTGAGE OBLIGATIONS 4.5% $25,627 Federal Home Loan Mortgage Corp. (REMIC).................. 5.500% 04/15/15 to 06/15/15 $ 26,145,989 9,000 Federal National Mortgage Association Pools.............. 6.000 02/25/22 9,221,078 20,250 Federal National Mortgage Association Pools.............. 6.022 11/25/10 20,157,358 9,160 Government National Mortgage Association Pools.............. 5.500 02/16/23 9,343,606 -------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS.................... 64,868,031 -------------- MORTGAGE BACKED SECURITIES 20.8% 3,854 Federal Home Loan Mortgage Corp. Gold 30 Year Pools....... 6.000 04/01/31 to 06/01/31 3,743,067 18,843 Federal Home Loan Mortgage Corp. Gold 30 Year Pools....... 7.500 01/01/22 to 11/01/30 19,559,742 523 Federal Home Loan Mortgage Corp. Gold 30 Year Pools....... 8.000 07/01/24 to 09/01/24 555,572 0 Federal Home Loan Mortgage Corp. Non-Gold 30 Year Pools... 11.000 02/01/14 216 9,042 Federal National Mortgage Association 15 Year Dwarf Pools.......................... 6.000 01/01/09 to 01/01/10 9,221,299 9,664 Federal National Mortgage Association 15 Year Dwarf Pools.......................... 6.500 12/01/07 to 06/01/12 9,938,427 2,910 Federal National Mortgage Association 15 Year Dwarf Pools.......................... 7.000 03/01/15 to 07/01/15 3,015,780 10,449 Federal National Mortgage Association 15 Year Dwarf Pools.......................... 7.500 01/01/07 to 09/01/12 11,029,792 36,053 Federal National Mortgage Association 30 Year Pools...... 6.000 02/01/28 to 07/01/29 35,239,577 </Table> See Notes to Financial Statements 11 YOUR FUND'S INVESTMENTS March 31, 2002 (Unaudited) <Table> <Caption> PAR AMOUNT MARKET (000) DESCRIPTION COUPON MATURITY VALUE <C> <S> <C> <C> <C> MORTGAGE BACKED SECURITIES (CONTINUED) $77,202 Federal National Mortgage Association 30 Year Pools...... 6.500% 05/01/23 to 11/01/28 $ 77,398,552 15,498 Federal National Mortgage Association 30 Year Pools...... 7.500 03/01/22 to 11/01/30 16,105,554 33 Federal National Mortgage Association 30 Year Pools...... 8.000 09/01/24 to 11/01/24 34,693 74 Federal National Mortgage Association 30 Year Pools...... 11.500 02/01/15 to 05/01/19 83,152 1,053 Federal National Mortgage Association 30 Year Pools...... 12.000 03/01/13 to 01/01/16 1,191,522 5,794 Government National Mortgage Association 30 Year Pools...... 6.000 12/15/28 5,651,984 21,417 Government National Mortgage Association 30 Year Pools...... 6.500 06/15/23 to 02/15/29 21,453,751 26,485 Government National Mortgage Association 30 Year Pools...... 7.000 12/15/22 to 12/15/27 27,161,959 19,329 Government National Mortgage Association 30 Year Pools...... 7.500 02/15/07 to 08/15/24 20,342,284 13,665 Government National Mortgage Association 30 Year Pools...... 8.000 07/15/07 to 10/15/25 14,646,089 8,553 Government National Mortgage Association 30 Year Pools...... 8.500 09/15/04 to 12/15/21 9,298,177 2,342 Government National Mortgage Association 30 Year Pools...... 9.000 12/15/17 2,574,398 34 Government National Mortgage Association 30 Year Pools...... 11.000 01/15/10 to 11/15/20 38,669 1,433 Government National Mortgage Association 30 Year Pools...... 12.000 06/15/11 to 06/15/15 1,656,283 811 Government National Mortgage Association 30 Year Pools...... 12.500 05/15/10 to 07/15/18 943,137 1,186 Government National Mortgage Association 30 Year Pools (FHA/VA)....................... 7.000 04/15/24 1,224,156 1,872 Government National Mortgage Association II 30 Year Pools... 6.000 04/20/29 1,809,696 3,579 Government National Mortgage Association II 30 Year Pools... 6.500 11/20/28 3,563,398 -------------- TOTAL MORTGAGE BACKED SECURITIES 20.8%...................... 297,480,926 -------------- </Table> See Notes to Financial Statements 12 YOUR FUND'S INVESTMENTS March 31, 2002 (Unaudited) <Table> <Caption> PAR AMOUNT MARKET (000) DESCRIPTION COUPON MATURITY VALUE <C> <S> <C> <C> <C> UNITED STATES GOVERNMENT AGENCY OBLIGATIONS 4.4% $ 500 Federal Home Loan Mortgage Corp. Pools.................... 5.750% 07/15/03 $ 514,793 23,000 Federal Home Loan Mortgage Corp. Pools.................... 7.375 05/15/03 24,086,037 35,000 Federal National Mortgage Association Pools.............. 6.250 05/15/29 33,650,995 4,500 Federal National Mortgage Association Pools.............. 7.250 05/15/30 4,896,886 -------------- TOTAL UNITED STATES GOVERNMENT AGENCY OBLIGATIONS............ 63,148,711 -------------- UNITED STATES TREASURY OBLIGATIONS 69.3% 35,000 United States Treasury Bonds (a)............................ 6.125 11/15/27 35,407,340 83,600 United States Treasury Bonds (a)............................ 8.000 11/15/21 102,390,588 70,000 United States Treasury Bonds (a)............................ 8.125 08/15/19 85,722,574 34,000 United States Treasury Bonds (a)............................ 9.250 02/15/16 44,704,645 25,000 United States Treasury Bonds (a)............................ 9.375 02/15/06 29,126,855 7,000 United States Treasury Bonds (a)............................ 10.375 11/15/12 8,751,089 10,000 United States Treasury Bonds (a)............................ 10.750 08/15/05 11,939,062 27,000 United States Treasury Bonds (a)............................ 10.750 02/15/03 28,887,786 1,000 United States Treasury Bonds... 10.750 05/15/03 1,085,782 27,000 United States Treasury Bonds (a)............................ 11.625 11/15/02 28,563,044 11,000 United States Treasury Bonds (a)............................ 12.000 08/15/13 14,923,026 27,350 United States Treasury Notes (a)............................ 6.000 08/15/09 28,458,881 50,000 United States Treasury Notes... 6.250 07/31/02 50,726,310 95,000 United States Treasury Notes... 6.250 08/31/02 96,632,699 140,150 United States Treasury Notes (a)............................ 6.250 02/15/03 144,485,722 20,000 United States Treasury Notes (a)............................ 6.250 02/15/07 21,128,124 </Table> See Notes to Financial Statements 13 YOUR FUND'S INVESTMENTS March 31, 2002 (Unaudited) <Table> <Caption> PAR AMOUNT MARKET (000) DESCRIPTION COUPON MATURITY VALUE <C> <S> <C> <C> <C> UNITED STATES TREASURY OBLIGATIONS (CONTINUED) $75,000 United States Treasury Notes (a)............................ 6.375% 06/30/02 $ 75,855,465 50,000 United States Treasury Notes (a)............................ 6.375 08/15/02 50,831,890 20,000 United States Treasury Notes (a)............................ 6.500 10/15/06 21,315,600 9,500 United States Treasury Notes (a)............................ 6.625 05/15/07 10,196,124 41,900 United States Treasury Notes (a)............................ 6.750 05/15/05 44,790,442 55,000 United States Treasury Notes (a)............................ 7.500 05/15/02 55,386,441 -------------- TOTAL UNITED STATES TREASURY OBLIGATIONS 69.3%.............. 991,309,489 -------------- TOTAL LONG-TERM INVESTMENTS 99.0% (Cost $1,386,828,732)................................................. 1,416,807,157 REPURCHASE AGREEMENT 0.2% State Street Bank & Trust Co. ($2,964,000 par collateralized by U.S. Government obligations in a pooled cash account, dated 03/28/02, to be sold on 04/01/02 at $2,964,586) (Cost $2,964,000)................................................... 2,964,000 -------------- TOTAL INVESTMENTS 99.2% (Cost $1,389,792,732)................................................. 1,419,771,157 OTHER ASSETS IN EXCESS OF LIABILITIES 0.8%............................. 11,106,660 -------------- NET ASSETS 100.0%...................................................... $1,430,877,817 ============== </Table> (a) Assets segregated as collateral for open futures and forward transactions. FHA/VA--Federal Housing Administration/Department of Veterans Affairs REMIC--Real Estate Mortgage Investment Conduits See Notes to Financial Statements 14 FINANCIAL STATEMENTS Statement of Assets and Liabilities March 31, 2002 (Unaudited) <Table> <S> <C> ASSETS: Total Investments (Cost $1,389,792,732)..................... $1,419,771,157 Receivables: Interest.................................................. 18,022,569 Fund Shares Sold.......................................... 5,163,988 Other....................................................... 378,807 -------------- Total Assets............................................ 1,443,336,521 -------------- LIABILITIES: Payables: Fund Shares Repurchased................................... 6,023,536 Income Distributions...................................... 1,789,969 Distributor and Affiliates................................ 893,251 Custodian Bank............................................ 728,170 Investment Advisory Fee................................... 651,820 Variation Margin on Futures............................... 50,813 Forward Commitments......................................... 1,543,994 Trustees' Deferred Compensation and Retirement Plans........ 391,144 Accrued Expenses............................................ 386,007 -------------- Total Liabilities....................................... 12,458,704 -------------- NET ASSETS.................................................. $1,430,877,817 ============== NET ASSETS CONSIST OF: Capital (Par value of $.01 per share with an unlimited number of shares authorized).............................. $1,910,373,892 Net Unrealized Appreciation................................. 29,105,942 Accumulated Undistributed Net Investment Income............. (8,400,995) Accumulated Net Realized Loss............................... (500,201,022) -------------- NET ASSETS.................................................. $1,430,877,817 ============== MAXIMUM OFFERING PRICE PER SHARE: Class A Shares: Net asset value and redemption price per share (Based on net assets of $1,295,581,470 and 128,271,376 shares of beneficial interest issued and outstanding)............. $ 10.10 Maximum sales charge (4.75%* of offering price)......... .50 -------------- Maximum offering price to public........................ $ 10.60 ============== Class B Shares: Net asset value and offering price per share (Based on net assets of $110,122,667 and 10,921,529 shares of beneficial interest issued and outstanding)............. $ 10.08 ============== Class C Shares: Net asset value and offering price per share (Based on net assets of $25,173,680 and 2,503,405 shares of beneficial interest issued and outstanding)............. $ 10.06 ============== </Table> * On sales of $100,000 or more, the sales charge will be reduced. See Notes to Financial Statements 15 Statement of Operations For the Six Months Ended March 31, 2002 (Unaudited) <Table> <S> <C> INVESTMENT INCOME: Interest.................................................... $ 36,488,454 ------------ EXPENSES: Investment Advisory Fee..................................... 3,899,220 Distribution (12b-1) and Service Fees (Attributed to Classes A, B and C of $1,606,095, $551,335 and $127,504, respectively)............................................. 2,284,934 Shareholder Services........................................ 1,124,746 Custody..................................................... 111,048 Legal....................................................... 22,818 Trustees' Fees and Related Expenses......................... 17,082 Other....................................................... 318,417 ------------ Total Expenses............................................ 7,778,265 Less Credits Earned on Cash Balances...................... 25,894 ------------ Net Expenses.............................................. 7,752,371 ------------ NET INVESTMENT INCOME....................................... $ 28,736,083 ============ REALIZED AND UNREALIZED GAIN/LOSS: Realized Gain/Loss: Investments............................................... $ 22,579,250 Futures................................................... (591,112) Forward Commitments....................................... 3,860,684 ------------ Net Realized Gain........................................... 25,848,822 ------------ Unrealized Appreciation/Depreciation: Beginning of the Period................................... 89,407,587 ------------ End of the Period: Investments............................................. 29,978,425 Futures................................................. (321,985) Forward Commitments..................................... (550,498) ------------ 29,105,942 ------------ Net Unrealized Depreciation During the Period............... (60,301,645) ------------ NET REALIZED AND UNREALIZED LOSS............................ $(34,452,823) ============ NET DECREASE IN NET ASSETS FROM OPERATIONS.................. $ (5,716,740) ============ </Table> See Notes to Financial Statements 16 Statement of Changes in Net Assets (Unaudited) <Table> <Caption> SIX MONTHS ENDED YEAR ENDED MARCH 31, 2002 SEPTEMBER 30, 2001 -------------------------------------- <S> <C> <C> FROM INVESTMENT ACTIVITIES: Operations: Net Investment Income............................ $ 28,736,083 $ 78,495,845 Net Realized Gain................................ 25,848,822 12,896,537 Net Unrealized Appreciation/Depreciation During the Period..................................... (60,301,645) 73,567,948 -------------- -------------- Change in Net Assets from Operations............. (5,716,740) 164,960,330 -------------- -------------- Distributions from Net Investment Income: Class A Shares................................. (35,342,877) (69,265,808) Class B Shares................................. (2,555,632) (3,409,433) Class C Shares................................. (594,043) (960,268) -------------- -------------- Total Distributions.............................. (38,492,552) (73,635,509) -------------- -------------- NET CHANGE IN NET ASSETS FROM INVESTMENT ACTIVITIES..................................... (44,209,292) 91,324,821 -------------- -------------- FROM CAPITAL TRANSACTIONS: Proceeds from Shares Sold........................ 109,889,262 450,933,598 Net Asset Value of Shares Issued Through Dividend Reinvestment................................... 25,144,659 45,367,572 Cost of Shares Repurchased....................... (152,305,183) (558,005,453) -------------- -------------- NET CHANGE IN NET ASSETS FROM CAPITAL TRANSACTIONS................................... (17,271,262) (61,704,283) -------------- -------------- TOTAL INCREASE/DECREASE IN NET ASSETS............ (61,480,554) 29,620,538 NET ASSETS: Beginning of the Period.......................... 1,492,358,371 1,462,737,833 -------------- -------------- End of the Period (Including accumulated undistributed net investment income of ($8,400,995) and $5,617,558, respectively)..... $1,430,877,817 $1,492,358,371 ============== ============== </Table> See Notes to Financial Statements 17 Financial Highlights (Unaudited) THE FOLLOWING SCHEDULE PRESENTS FINANCIAL HIGHLIGHTS FOR ONE SHARE OF THE FUND OUTSTANDING THROUGHOUT THE PERIODS INDICATED. <Table> <Caption> SIX NINE MONTHS MONTHS YEAR CLASS A SHARES ENDED YEAR ENDED SEPTEMBER 30, ENDED ENDED MARCH 31, ------------------------------ SEPT. 30, DEC. 31, 2002 (A)(B) 2001 2000 1999 1998 1997 ------------------------------------------------------------------- <S> <C> <C> <C> <C> <C> <C> NET ASSET VALUE, BEGINNING OF THE PERIOD.................. $ 10.41 $ 9.77 $ 9.72 $ 10.64 $ 10.26 $ 10.05 -------- -------- -------- -------- -------- -------- Net Investment Income....... .21 .54 .56 .61 .48 .66 Net Realized and Unrealized Gain/Loss................. (.25) .61 .05 (.90) .39 .21 -------- -------- -------- -------- -------- -------- Total from Investment Operations....... (.04) 1.15 .61 (.29) .87 .87 Less Distributions from Net Investment Income........... .27 .51 .56 .63 .49 .66 -------- -------- -------- -------- -------- -------- NET ASSET VALUE, END OF THE PERIOD.................. $ 10.10 $ 10.41 $ 9.77 $ 9.72 $ 10.64 $ 10.26 ======== ======== ======== ======== ======== ======== Total Return (c)............. -0.37%* 12.07% 6.53% -2.71% 8.62%* 9.16% Net Assets at End of the Period (In millions)........ $1,295.6 $1,361.8 $1,389.6 $1,688.8 $1,933.8 $1,930.4 Ratio of Expenses to Average Net Assets.................. .99% 1.02% 1.00% 1.02% 1.02% 1.03% Ratio of Net Investment Income to Average Net Assets...................... 3.99% 5.41% 5.91% 6.01% 6.30% 6.62% Portfolio Turnover........... 37%* 65% 100% 94% 180%* 114% </Table> * Non-Annualized (a) As required, effective October 1, 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began amortizing premium on fixed income securities and presenting paydown gains and losses on mortgage- and asset-backed securities as interest income. The effect of these changes for the six months ended March 31, 2002 was to decrease net investment income per share by $.02, increase net realized and unrealized gains and losses per share by $.02, and decrease the ratio of net investment income to average net assets from 4.51% to 3.99%. Per share, ratios, and supplemental data for periods prior to March 31, 2002 have not been restated to reflect this change in presentation. (b) Based on average month-end shares outstanding. (c) Assumes reinvestment of all distributions for the period and does not include payment of the maximum sales charge of 4.75% or contingent deferred sales charge (CDSC). On purchases of $1 million or more, a CDSC of 1% may be imposed on certain redemptions made within one year of purchase. If the sales charges were included, total returns would be lower. These returns include combined Rule 12b-1 fees and service fees of up to .25% and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. See Notes to Financial Statements 18 Financial Highlights (Unaudited) THE FOLLOWING SCHEDULE PRESENTS FINANCIAL HIGHLIGHTS FOR ONE SHARE OF THE FUND OUTSTANDING THROUGHOUT THE PERIODS INDICATED. <Table> <Caption> SIX NINE MONTHS MONTHS YEAR ENDED YEAR ENDED SEPTEMBER 30, ENDED ENDED MARCH 31, ------------------------------ SEPT. 30, DEC. 31, 2002 (A)(B) 2001 (B) 2000 (B) 1999 (B) 1998 (B) 1997 (B) CLASS B SHARES ------------------------------------------------------------------- <S> <C> <C> <C> <C> <C> <C> NET ASSET VALUE, BEGINNING OF THE PERIOD.................. $10.40 $ 9.76 $9.71 $10.63 $10.26 $10.05 ------ ------ ----- ------ ------ ------ Net Investment Income....... .17 .47 .49 .53 .42 .59 Net Realized and Unrealized Gain/Loss................. (.25) .61 .05 (.89) .38 .21 ------ ------ ----- ------ ------ ------ Total from Investment Operations.................. (.08) 1.08 .54 (.36) .80 .80 Less Distributions from Net Investment Income........... .24 .44 .49 .56 .43 .59 ------ ------ ----- ------ ------ ------ NET ASSET VALUE, END OF THE PERIOD...................... $10.08 $10.40 $9.76 $ 9.71 $10.63 $10.26 ====== ====== ===== ====== ====== ====== Total Return (c)............. -0.81%* 11.35% 5.76% -3.49% 8.05%* 8.27% Net Assets at End of the Period (In millions)........ $110.1 $104.9 $59.5 $ 93.9 $153.2 $199.2 Ratio of Expenses to Average Net Assets.................. 1.76% 1.77% 1.75% 1.78% 1.78% 1.78% Ratio of Net Investment Income to Average Net Assets...................... 3.23% 4.66% 5.16% 5.24% 5.55% 5.87% Portfolio Turnover........... 37%* 65% 100% 94% 180%* 114% </Table> * Non-Annualized (a) As required, effective October 1, 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began amortizing premium on fixed income securities and presenting paydown gains and losses on mortgage- and asset-backed securities as interest income. The effect of these changes for the six months ended March 31, 2002 was to decrease net investment income per share by $.02, increase net realized and unrealized gains and losses per share by $.02, and decrease the ratio of net investment income to average net assets from 3.74% to 3.23%. Per share, ratios, and supplemental data for periods prior to March 31, 2002 have not been restated to reflect this change in presentation. (b) Based on average month-end shares outstanding. (c) Assumes reinvestment of all distributions for the period and does not include payment of the maximum CDSC of 4%, charged on certain redemptions made within the first and second years of purchase and declining to 0% after the fifth year. If the sales charge was included, total returns would be lower. These returns include combined Rule 12b-1 fees and service fees of 1% and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. See Notes to Financial Statements 19 Financial Highlights (Unaudited) THE FOLLOWING SCHEDULE PRESENTS FINANCIAL HIGHLIGHTS FOR ONE SHARE OF THE FUND OUTSTANDING THROUGHOUT THE PERIODS INDICATED. <Table> <Caption> SIX NINE MONTHS MONTHS YEAR CLASS C SHARES ENDED YEAR ENDED SEPTEMBER 30, ENDED ENDED MARCH 31, ------------------------------ SEPT. 30, DEC. 31, 2002 (A)(B) 2001 (B) 2000 (B) 1999 (B) 1998 (B) 1997 (B) -------------------------------------------------------------------- <S> <C> <C> <C> <C> <C> <C> NET ASSET VALUE, BEGINNING OF THE PERIOD......................... $10.37 $ 9.74 $9.69 $10.61 $10.24 $10.03 ------ ------ ----- ------ ------ ------ Net Investment Income.............. .17 .47 .49 .53 .42 .59 Net Realized and Unrealized Gain/Loss........................ (.24) .60 .05 (.89) .38 .21 ------ ------ ----- ------ ------ ------ Total from Investment Operations.............. (.07) 1.07 .54 (.36) .80 .80 Less Distributions from Net Investment Income.................. .24 .44 .49 .56 .43 .59 ------ ------ ----- ------ ------ ------ NET ASSET VALUE, END OF THE PERIOD......................... $10.06 $10.37 $9.74 $ 9.69 $10.61 $10.24 ====== ====== ===== ====== ====== ====== Total Return (c).................... -0.71%* 11.27% 5.78% -3.50% 8.07%* 8.28% Net Assets at End of the Period (In millions)............... $ 25.2 $ 25.6 $13.6 $ 18.7 $ 19.3 $ 16.4 Ratio of Expenses to Average Net Assets............................. 1.76% 1.76% 1.75% 1.78% 1.78% 1.79% Ratio of Net Investment Income to Average Net Assets......................... 3.23% 4.67% 5.16% 5.25% 5.51% 5.87% Portfolio Turnover.................. 37%* 65% 100% 94% 180%* 114% </Table> * Non-Annualized (a) As required, effective October 1, 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began amortizing premium on fixed income securities and presenting paydown gains and losses on mortgage- and asset-backed securities as interest income. The effect of these changes for the six months ended March 31, 2002 was to decrease net investment income per share by $.02, increase net realized and unrealized gains and losses per share by $.02, and decrease the ratio of net investment income to average net assets from 3.74% to 3.23%. Per share, ratios, and supplemental data for periods prior to March 31, 2002 have not been restated to reflect this change in presentation. (b) Based on average month-end shares outstanding. (c) Assumes reinvestment of all distributions for the period and does not include payment of the maximum CDSC of 1%, charged on certain redemptions made within one year of purchase. If the sales charge was included, total returns would be lower. These returns include combined Rule 12b-1 fees and service fees of 1% and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. See Notes to Financial Statements 20 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) 1. SIGNIFICANT ACCOUNTING POLICIES Van Kampen Government Securities Fund (the "Fund") is organized as a Delaware business trust, and is registered as a diversified open-end management investment company under the Investment Company Act of 1940 (the "1940 Act"), as amended. The Fund's investment objective is to seek to provide high current return consistent with preservation of capital. The Fund commenced investment operations on July 16, 1984. The distribution of the Fund's Class B and C Shares commenced on December 20, 1991 and March 10, 1993, respectively. The following is a summary of significant accounting policies consistently followed by the Fund in the preparation of its financial statements. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. A. SECURITY VALUATION Investments and forwards are stated at value using market quotations or indications of value obtained from an independent pricing service based upon the mean of the bid and asked prices. For those securities where quotations or prices are not available, valuations are determined in accordance with procedures established in good faith by the Board of Trustees. Futures contracts are valued at the settlement price established each day on the exchange on which they are traded. Short-term securities with remaining maturities of 60 days or less are valued at amortized cost, which approximates market value. B. SECURITY TRANSACTIONS Security transactions are recorded on a trade date basis. Realized gains and losses are determined on an identified cost basis. The Fund may purchase and sell securities on a "when-issued" or "delayed delivery" basis, with settlement to occur at a later date. The value of the security so purchased is subject to market fluctuations during this period. The Fund will maintain, in a segregated account with its custodian, assets having an aggregate value at least equal to the amount of the when-issued or delayed delivery purchase commitments until payment is made. At March 31, 2002, there were no when-issued or delayed delivery purchase commitments. The Fund may invest in repurchase agreements which are short-term investments in which the Fund acquires ownership of a debt security and the seller agrees to repurchase the security at a future time and specified price. The Fund may invest independently in repurchase agreements, or transfer uninvested cash balances into a pooled cash account along with other investment companies 21 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) advised by Van Kampen Asset Management Inc. (the "Adviser") or its affiliates, the daily aggregate of which is invested in repurchase agreements. Repurchase agreements are fully collateralized by the underlying debt security. The Fund will make payment for such securities only upon physical delivery or evidence of book entry transfer to the account of the custodian bank. The seller is required to maintain the value of the underlying security at not less than the repurchase proceeds due the Fund. C. INCOME AND EXPENSES Interest income is recorded on an accrual basis. Discount is accreted and premium is amortized over the expected life of each applicable security. Income and expenses of the Fund are allocated on a pro rata basis to each class of shares, except for distribution and service fees and transfer agency costs which are unique to each class of shares. As required, effective October 1, 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began amortizing premium on fixed income securities. Prior to October 1, 2001, the Fund did not amortize premiums on fixed income securities. The cumulative effect of this accounting change had no impact on total net assets of the Fund, but resulted in a $4,262,084 reduction in cost of securities and a corresponding $4,262,084 increase in net unrealized appreciation, based on securities held by the Fund on October 1, 2001. The effect of this change for the six months ended March 31, 2002 was to decrease net investment income by $4,357,224; increase net unrealized appreciation by $4,351,988 and increase net realized gain by $5,236. The Statement of Changes in Net Assets and Financial Highlights for prior periods have not been restated to reflect this change in presentation. The revised version of the Guide also requires that paydown gains and losses on mortgage- and asset-backed securities be presented as interest income. Previously, paydown gains and losses on mortgage- and asset-backed securities were shown as a component of realized gain/loss. The effect of this change for the six months ended March 31, 2002 was to increase net investment income and decrease realized gain/loss by $589,318. D. FEDERAL INCOME TAXES It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its taxable income to its shareholders. Therefore, no provision for federal income taxes is required. At March 31, 2002, for federal income tax purposes, the cost of long- and short-term investments is $1,403,778,799, the aggregate gross unrealized appreciation is $21,000,002 and the aggregate gross unrealized depreciation is $5,007,644, 22 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) resulting in net unrealized appreciation on long- and short-term investments of $15,992,358. The Fund intends to utilize provisions of the federal income tax laws which allow it to carry a realized capital loss forward for eight years following the year of the loss and offset these losses against any future realized capital gains. At September 30, 2001, the Fund had an accumulated capital loss carryforward for tax purposes of $519,680,716 which will expire between September 30, 2002 and September 30, 2009. Of this amount, $355,498,467 will expire on September 30, 2002. Net realized gains or losses may differ for financial and tax reporting purposes primarily as a result of the deferral of losses relating to wash sale transactions, straddle positions, and gains or losses recognized for tax purposes on open futures and forward transactions. E. DISTRIBUTION OF INCOME AND GAINS The Fund declares daily and pays monthly dividends from net investment income. Net realized gains, if any, are distributed annually. Distributions from net realized gains for book purposes may include short-term capital gains and gains on forwards and futures transactions. All short-term capital gains and a portion of futures gains are included in ordinary income for tax purposes. F. EXPENSE REDUCTIONS During the six months ended March 31, 2002, the Fund's custody fee was reduced by $25,894 as a result of credits earned on cash balances. 2. INVESTMENT ADVISORY AGREEMENT AND OTHER TRANSACTIONS WITH AFFILIATES Under the terms of the Fund's Investment Advisory Agreement, the Adviser will provide investment advice and facilities to the Fund for an annual fee, payable monthly, as follows: <Table> <Caption> AVERAGE DAILY NET ASSETS % PER ANNUM <S> <C> First $1 billion............................................ .540% Next $1 billion............................................. .515% Next $1 billion............................................. .490% Next $1 billion............................................. .440% Next $1 billion............................................. .390% Next $1 billion............................................. .340% Next $1 billion............................................. .290% Over $7 billion............................................. .240% </Table> For the six months ended March 31, 2002, the Fund recognized expenses of approximately $22,800 representing legal services provided by Skadden, Arps, Slate, 23 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) Meagher & Flom (Illinois), counsel to the Fund, of which a trustee of the Fund is an affiliated person. Under an Accounting Services agreement, the Adviser provides accounting services to the Fund. The Adviser allocates the cost of such services to each fund. For the six months ended March 31, 2002, the Fund recognized expenses of approximately $44,600 representing Van Kampen Investments Inc.'s or its affiliates' (collectively "Van Kampen") cost of providing accounting services to the Fund, which are reported as part of "Other" expenses on the Statement of Operations. Van Kampen Investor Services Inc., an affiliate of the Adviser, serves as the shareholder servicing agent for the Fund. For the six months ended March 31, 2002, the Fund recognized expenses of approximately $919,100. Transfer agency fees are determined through negotiations with the Fund's Board of Trustees and are based upon competitive market benchmarks. Certain officers and trustees of the Fund are also officers and directors of Van Kampen. The Fund does not compensate its officers or trustees who are officers of Van Kampen. The Fund provides deferred compensation and retirement plans for its trustees who are not officers of Van Kampen. Under the deferred compensation plan, trustees may elect to defer all or a portion of their compensation to a later date. Amounts deferred are retained by the Fund and to the extent permitted by the 1940 Act, as amended, may be invested in the common shares of those funds selected by the trustees. Investments in such funds of $251,815 are included in "Other" assets on the Statement of Assets and Liabilities at March 31, 2002. Appreciation/depreciation and distributions received from these investments are recorded with an offsetting increase/decrease in the deferred compensation obligation and do not affect the net asset value of the Fund. Benefits under the retirement plan are payable upon retirement for a ten-year period and are based upon each trustee's years of service to the Fund. The maximum annual benefit per trustee under the plan is $2,500. 24 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) 3. CAPITAL TRANSACTIONS At March 31, 2002, capital aggregated $1,839,308,039, $50,535,513 and $20,530,340 for Classes A, B and C, respectively. For the six months ended March 31, 2002, transactions were as follows: <Table> <Caption> SHARES VALUE <S> <C> <C> Sales: Class A............................................... 6,957,666 $ 71,708,589 Class B............................................... 3,042,694 31,425,282 Class C............................................... 655,799 6,755,391 ----------- ------------- Total Sales............................................. 10,656,159 $ 109,889,262 =========== ============= Dividend Reinvestment: Class A............................................... 2,198,107 $ 22,653,215 Class B............................................... 200,977 2,067,734 Class C............................................... 41,277 423,710 ----------- ------------- Total Dividend Reinvestment............................. 2,440,361 $ 25,144,659 =========== ============= Repurchases: Class A............................................... (11,704,426) $(120,679,589) Class B............................................... (2,412,357) (24,775,613) Class C............................................... (666,023) (6,849,981) ----------- ------------- Total Repurchases....................................... (14,782,806) $(152,305,183) =========== ============= </Table> 25 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) At September 30, 2001, capital aggregated $1,865,625,824, $41,818,110 and $20,201,220 for Classes A, B and C, respectively. For the year ended September 30, 2001, transactions were as follows: <Table> <Caption> SHARES VALUE <S> <C> <C> Sales: Class A............................................... 32,587,470 $ 330,395,518 Class B............................................... 8,942,042 90,932,923 Class C............................................... 2,930,802 29,605,157 ----------- ------------- Total Sales............................................. 44,460,314 $ 450,933,598 =========== ============= Dividend Reinvestment: Class A............................................... 4,159,799 $ 42,099,704 Class B............................................... 260,046 2,632,391 Class C............................................... 62,880 635,477 ----------- ------------- Total Dividend Reinvestment............................. 4,482,725 $ 45,367,572 =========== ============= Repurchases: Class A............................................... (48,111,210) $(486,125,771) Class B............................................... (5,207,554) (52,520,003) Class C............................................... (1,920,985) (19,359,679) ----------- ------------- Total Repurchases....................................... (55,239,749) $(558,005,453) =========== ============= </Table> Class B Shares purchased on or after June 1, 1996, and any dividend reinvestment plan Class B Shares received thereon, automatically convert to Class A Shares eight years after the end of the calendar month in which the shares were purchased. Class B Shares purchased before June 1, 1996, and any dividend reinvestment plan Class B Shares received thereon, automatically convert to Class A Shares six years after the end of the calendar month in which the shares were purchased. For the six months ended March 31, 2002 and the year ended September 30, 2001, 296,433 and 868,715 Class B Shares converted to Class A Shares, respectively and are shown in the above tables as sales of Class A Shares and repurchase of Class B Shares. Class C Shares purchased before January 1, 1997, and any dividend reinvestment plan Class C Shares received thereon, automatically convert to Class A Shares ten years after the end of the calendar month in which such shares were purchased. Class C Shares purchased on or after January 1, 1997, do not possess a conversion feature. For the six months ended March 31, 2002 and the year ended September 30, 2001, no Class C Shares converted to Class A Shares. Class B and C Shares are offered without a front end sales charge, but are subject to a contingent deferred sales charge (CDSC). The CDSC will be imposed on most redemptions made within five years of the purchase 26 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) for Class B Shares and one year of the purchase for Class C Shares as detailed in the following schedule. <Table> <Caption> CONTINGENT DEFERRED SALES CHARGE AS A PERCENTAGE OF DOLLAR AMOUNT SUBJECT TO CHARGE -------------------------- YEAR OF REDEMPTION CLASS B CLASS C <S> <C> <C> First.................................................... 4.00% 1.00% Second................................................... 4.00% None Third.................................................... 3.00% None Fourth................................................... 2.50% None Fifth.................................................... 1.50% None Sixth and Thereafter..................................... None None </Table> For the six months ended March 31, 2002, Van Kampen, as Distributor for the Fund, received net commissions on sales of the Fund's Class A Shares of approximately $75,400 and CDSC on redeemed shares of approximately $147,700. Sales charges do not represent expenses of the Fund. 4. INVESTMENT TRANSACTIONS During the period, the cost of purchases and proceeds from sales of government securities, including paydowns on mortgage-backed securities and excluding short-term investments and forward commitment transactions, were $517,225,928 and $455,204,192, respectively. 5. DERIVATIVE FINANCIAL INSTRUMENTS A derivative financial instrument in very general terms refers to a security whose value is "derived" from the value of an underlying asset, reference rate or index. The Fund has a variety of reasons to use derivative instruments, such as to attempt to protect the Fund against possible changes in the market value of its portfolio and to manage the portfolio's effective yield, maturity and duration. All of the Fund's portfolio holdings, including derivative instruments, are marked to market each day with the change in value reflected in unrealized appreciation/depreciation. Upon disposition, a realized gain or loss is recognized accordingly, except when taking delivery of a security underlying a futures contract or forward commitment. In this instance, the recognition of gain or loss is postponed until the disposal of the security underlying the futures contract or forward commitment. 27 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) Summarized below are the specific types of derivative financial instruments used by the Fund. A. FUTURES CONTRACTS During the period, the Fund invested in futures contracts, a type of derivative. A futures contract is an agreement involving the delivery of a particular asset on a specified future date at an agreed upon price. The Fund generally invests in exchange traded futures contracts on U.S. Treasury Bonds and typically closes the contract prior to the delivery date. Futures contracts are valued at the settlement price established each day on the exchange on which they are traded. Upon entering into futures contracts, the Fund maintains an amount of cash or liquid securities with a value equal to a percentage of the contract amount with either a futures commission merchant pursuant to rules and regulations promulgated under the 1940 Act, as amended, or with its custodian in an account in the broker's name. This amount is known as initial margin. During the period the futures contract is open, payments are received from or made to the broker based upon changes in the value of the contract (the variation margin). The risk of loss associated with a futures contract is in excess of the variation margin reflected on the Statement of Assets and Liabilities. Transactions in futures contracts for the six months ended March 31, 2002 were as follows: <Table> <Caption> CONTRACTS <S> <C> Outstanding at September 30, 2001........................... 421 Futures Opened.............................................. 9,171 Futures Closed.............................................. (8,784) ------ Outstanding at March 31, 2002............................... 808 ====== </Table> 28 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) The futures contracts outstanding as of March 31, 2002, and the descriptions and unrealized appreciation/depreciation are as follows: <Table> <Caption> UNREALIZED APPRECIATION/ CONTRACTS DEPRECIATION <S> <C> <C> LONG CONTRACTS: U.S. Treasury Notes 2-Year Futures June 2002 (Current Notional Value of $206,594 per contract)....... 250 $(558,703) U.S. Treasury Notes 5-Year Futures June 2002 (Current Notional Value of $103,734 per contract)....... 422 (47,794) SHORT CONTRACTS: U.S. Treasury Bonds Futures June 2002 (Current Notional Value of $98,156 per contract)........ 80 292,784 U.S. Treasury Notes 10-Year Futures June 2002 (Current Notional Value of $102,453 per contract)....... 56 (8,272) --- --------- 808 $(321,985) === ========= </Table> B. FORWARD COMMITMENTS The Fund trades certain securities under the terms of forward commitments, whereby the settlement occurs at a specific future date. Forward commitments are privately negotiated transactions between the Fund and dealers. While forward commitments are outstanding, the Fund maintains sufficient collateral of cash or securities in a segregated account with its custodian. Forward commitments are marked-to-market on a daily basis with changes in value reflected as a component of unrealized appreciation/depreciation. Purchasing securities on a forward commitment involves a risk that the market value at the time of delivery may be lower than the agreed upon purchase price resulting in an unrealized loss. This potential for loss may be greater than the amount shown on the Statement of Assets and Liabilities for forwards that do not intend to settle. Selling securities on a forward commitment involves different risks and can result in losses more significant than those arising from the purchase of such securities. 29 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) The Fund's market exposure from these positions is equal to the Current Value noted below. The following forward commitments were outstanding as of March 31, 2002: <Table> <Caption> PAR UNREALIZED AMOUNT CURRENT APPRECIATION/ (000) DESCRIPTION VALUE DEPRECIATION <C> <S> <C> <C> $ 21,500 FNMA April Forward, 6.00% coupon............. $ 21,419,375 $ (60,469) 74,000 FNMA April Forward, 6.50% coupon............. 73,607,060 (901,690) 144,000 FNMA April Forward, 7.00% coupon............. 149,084,640 449,640 35,250 FNMA April Forward, 7.50% coupon............. 36,494,677 66,005 74,000 FNMA May Forward, 6.50% coupon............... 73,260,000 (115,625) 37,250 FNMA May Forward, 7.50% coupon............... 38,414,063 11,641 ------------ --------- $392,279,815 $(550,498) ============ ========= </Table> C. CLOSED BUT UNSETTLED FORWARD COMMITMENTS In certain situations, the Fund has entered into offsetting transactions for outstanding forward commitments prior to the settlement of the obligation. In doing so, the Fund realizes a gain or loss on the transaction at the time the forward commitment is closed. Risks may result as a result of the potential inability of counterparties to meet the terms of their contracts. As of March 31, 2002, the Fund has net realized losses on closed but unsettled forward contracts of $993,496 which are scheduled to settle on April 11, 2002. 6. DISTRIBUTION AND SERVICE PLANS With respect to its Class A Shares, Class B Shares and Class C Shares, the Fund and its shareholders have adopted a distribution plan pursuant to Rule 12b-1 under the 1940 Act, as amended, and a service plan (collectively, the "Plans"). The Plans govern payments for: the distribution of the Fund's Class A Shares, Class B Shares and Class C Shares; the provision of ongoing shareholder services with respect to such classes of shares; and the maintenance of shareholder accounts with respect to such classes of shares. Annual fees under the Plans of up to .25% of Class A average net assets and 1.00% each of Class B and Class C average net assets are accrued daily. Included in these fees for the six months ended March 31, 2002 are payments retained by Van Kampen of approximately $526,400 and payments made to Morgan Stanley DW Inc., an affiliate of the Adviser, of approximately $73,600. 30 NOTES TO FINANCIAL STATEMENTS March 31, 2002 (Unaudited) 7. FUND MERGER On March 12, 2002, the Trustees of Van Kampen U.S. Government Trust for Income ("Target Fund") announced its intention to merge the Target Fund into the Van Kampen Government Securities Fund ("Acquiring Fund"). The Trustees of each of the funds have approved in principle an agreement and plan of reorganization between the funds providing for a transfer of assets and liabilities of the Target Fund to the Acquiring Fund in exchange for shares of beneficial interest of the Acquiring Fund (the "Reorganization"). The Reorganization is subject to the approval by the shareholders of the Target Fund. 31 VAN KAMPEN INVESTMENTS THE VAN KAMPEN FAMILY OF FUNDS Growth Aggressive Growth American Value* Emerging Growth Enterprise Equity Growth Focus Equity Growth Mid Cap Growth Pace Select Growth Small Cap Growth Small Cap Value Tax Managed Equity Growth Technology Growth and Income Comstock Equity and Income Growth and Income Harbor Real Estate Securities Utility Value Value Opportunities Global/International Asian Equity Emerging Markets European Value Equity Global Equity Allocation Global Franchise Global Value Equity International Advantage International Magnum Latin American Worldwide High Income Income Corporate Bond Government Securities High Income Corporate Bond High Yield Limited Maturity Government U.S. Government U.S. Government Trust for Income* Capital Preservation Reserve Tax Free Money Senior Loan Prime Rate Income Trust Senior Floating Rate Tax Free California Insured Tax Free Florida Insured Tax Free Income* High Yield Municipal** Insured Tax Free Income Intermediate Term Municipal Income Municipal Income New York Tax Free Income Pennsylvania Tax Free Income Strategic Municipal Income For more complete information, including risk considerations, fees, sales charges and ongoing expenses, please contact your financial advisor for a prospectus. Please read it carefully before you invest or send money. To view a current Van Kampen fund prospectus or to receive additional fund information, choose from one of the following: - visit our Web site at VANKAMPEN.COM-- to view a prospectus, select Download Prospectus [COMPUTER ICON] - call us at (800) 341-2911 Telecommunications Device for the Deaf (TDD) users, call (800) 421-2833. [PHONE ICON] - e-mail us by visiting VANKAMPEN.COM and selecting Contact Us [MAIL ICON] * Closed to new investors ** Open to new investors for a limited time 32 BOARD OF TRUSTEES AND IMPORTANT ADDRESSES VAN KAMPEN GOVERNMENT SECURITIES FUND BOARD OF TRUSTEES J. MILES BRANAGAN JERRY D. CHOATE LINDA HUTTON HEAGY R. CRAIG KENNEDY MITCHELL M. MERIN* JACK E. NELSON RICHARD F. POWERS, III* WAYNE W. WHALEN* - Chairman SUZANNE H. WOOLSEY INVESTMENT ADVISER VAN KAMPEN ASSET MANAGEMENT INC. 1 Parkview Plaza P.O. Box 5555 Oakbrook Terrace, Illinois 60181-5555 DISTRIBUTOR VAN KAMPEN FUNDS INC. 1 Parkview Plaza P.O. Box 5555 Oakbrook Terrace, Illinois 60181-5555 SHAREHOLDER SERVICING AGENT VAN KAMPEN INVESTOR SERVICES INC. P.O. Box 218256 Kansas City, Missouri 64121-8256 CUSTODIAN STATE STREET BANK AND TRUST COMPANY 225 Franklin Street P.O. Box 1713 Boston, Massachusetts 02110 LEGAL COUNSEL SKADDEN, ARPS, SLATE, MEAGHER & FLOM (ILLINOIS) 333 West Wacker Drive Chicago, Illinois 60606 INDEPENDENT AUDITORS ERNST & YOUNG LLP 233 South Wacker Drive Chicago, Illinois 60606 * "Interested persons" of the Fund, as defined in the Investment Company Act of 1940, as amended. 33 Van Kampen Privacy Notice The Van Kampen companies and investment products* respect your right to privacy. We also know that you expect us to conduct and process your business in an accurate and efficient manner. To do so, we must collect and maintain certain nonpublic personal information about you. This is information we collect from you on applications or other forms, and from the transactions you make with us, our affiliates, or third parties. We may also collect information you provide when using our web site, and text files (a.k.a. "cookies") may be placed on your computer to help us to recognize you and to facilitate transactions you initiate. We do not disclose any nonpublic personal information about you or any of our former customers to anyone, except as permitted by law. For instance, so that we may continue to offer you Van Kampen investment products and services that meet your investing needs, and to effect transactions that you request or authorize, we may disclose the information we collect to companies that perform services on our behalf, such as printers and mailers that assist us in the distribution of investor materials. These companies will use this information only for the services for which we hired them, and are not permitted to use or share this information for any other purpose. To protect your nonpublic personal information internally, we permit access to it only by authorized employees, and maintain physical, electronic and procedural safeguards to guard your nonpublic personal information. * Includes Van Kampen Investments Inc., Van Kampen Investment Advisory Corp., Van Kampen Asset Management Inc., Van Kampen Advisors Inc., Van Kampen Management Inc., Van Kampen Funds Inc., Van Kampen Investor Services Inc., Van Kampen Trust Company, Van Kampen System Inc. and Van Kampen Exchange Corp., as well as the many Van Kampen mutual funds and Van Kampen unit investment trusts. Van Kampen Funds Inc. 1 Parkview Plaza, P.O. Box 5555 Oakbrook Terrace, IL 60181-5555 vankampen.com [VAN KAMPEN INVESTMENTS LOGO] Copyright (C)2002 Van Kampen Funds Inc. All rights reserved. 29, 129, 229 Member NASD/SIPC. GOVT SAR 5/02 5557E02-AP-5/02