Exhibit (b)
SECTION 906 CERTIFICATIONS
In connection with this report on Form N-CSR for the Registrant as furnished to the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| (1) | the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as applicable; and |
| (2) | the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
| By: | /s/ Kirk C. Lehneis | |
| Kirk C. Lehneis | ||
| President and Principal Executive Officer, MainStay Funds Trust | ||
| Date: January 6, 2023 | ||
SECTION 906 CERTIFICATIONS
In connection with this report on Form N-CSR for the Registrant as furnished to the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| (1) | the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as applicable; and |
| (2) | the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
| By: | /s/ Jack R. Benintende | |
| Jack R. Benintende | ||
| Treasurer and Principal Financial and Accounting Officer, | ||
| MainStay Funds Trust | ||
| Date: January 6, 2023 | ||