# EDGAR Filing Document

**Accession Number:** 0001469192
**File Stem:** 0001741773-23-000831
**Filing Date:** 2023-3
**Character Count:** 12015
**Document Hash:** 8e6aea99c7e5e6cb65acadab7f5887b1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001741773-23-000831.hdr.sgml**: 20230301

**ACCESSION NUMBER**: 0001741773-23-000831

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230301

**DATE AS OF CHANGE**: 20230301

**EFFECTIVENESS DATE**: 20230301

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAINSTAY FUNDS TRUST
- **CENTRAL INDEX KEY:** 0001469192
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-160918
- **FILM NUMBER:** 23692273

**BUSINESS ADDRESS:**
- **STREET 1:** 51 MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010
- **BUSINESS PHONE:** 212 576 7000

**MAIL ADDRESS:**
- **STREET 1:** 51 MADISON AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10010

## Series and Classes Contracts Data

### MainStay Epoch U.S. Equity Yield Fund (Series ID: S000026784)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000080506 | Investor Class | EPLIX           |
| C000080507 | Class A        | EPLPX           |
| C000080508 | Class C        | EPLKX           |
| C000080509 | Class I        | EPLCX           |
| C000180191 | Class B        | EPLBX           |
| C000180192 | Class R1       | EPLRX           |
| C000180193 | Class R2       | EPLSX           |
| C000180194 | Class R3       | EPLTX           |
| C000180195 | Class R6       | EPLDX           |
| C000221654 | SIMPLE Class   | EPLMX           |

### MainStay Epoch Global Equity Yield Fund (Series ID: S000026786)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000080514 | Class A        | EPSPX           |
| C000080515 | Class C        | EPSKX           |
| C000080516 | Class I        | EPSYX           |
| C000080517 | Investor Class | EPSIX           |
| C000127145 | Class R6       | EPSRX           |
| C000138227 | Class R2       | EPSZX           |
| C000166838 | Class R3       | EPSHX           |

### MainStay MacKay High Yield Municipal Bond Fund (Series ID: S000028227)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000086335 | Investor Class | MMHVX           |
| C000086336 | Class A        | MMHAX           |
| C000086337 | Class C        | MMHDX           |
| C000086338 | Class I        | MMHIX           |
| C000185918 | Class R6       | MMHEX           |

### MainStay Epoch International Choice Fund (Series ID: S000028522)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087295 | Investor Class | ICELX           |
| C000087296 | Class A        | ICEVX           |
| C000087297 | Class C        | ICEWX           |
| C000087298 | Class I        | ICEUX           |
| C000087299 | Class R1       | ICETX           |
| C000087300 | Class R2       | ICEYX           |
| C000087301 | Class R3       | ICEZX           |
| C000221657 | SIMPLE Class   | ICERX           |

### MainStay S&P 500 Index Fund (Series ID: S000028525)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087312 | Investor Class | MYSPX           |
| C000087313 | Class A        | MSXAX           |
| C000087314 | Class I        | MSPIX           |
| C000221659 | SIMPLE Class   | MSXMX           |

### MainStay Floating Rate Fund (Series ID: S000028529)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087333 | Investor Class | MXFNX           |
| C000087334 | Class A        | MXFAX           |
| C000087335 | Class B        | MXFBX           |
| C000087336 | Class C        | MXFCX           |
| C000087337 | Class I        | MXFIX           |
| C000166839 | Class R3       | MXFHX           |
| C000185929 | Class R6       | MXFEX           |
| C000221660 | SIMPLE Class   | MXFMX           |

### MainStay Conservative Allocation Fund (Series ID: S000028532)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087350 | Investor Class | MCKNX           |
| C000087351 | Class A        | MCKAX           |
| C000087352 | Class B        | MCKBX           |
| C000087353 | Class C        | MCKCX           |
| C000087354 | Class I        | MCKIX           |
| C000166840 | Class R3       | MCKRX           |
| C000210249 | Class R2       | MCKKX           |
| C000221661 | SIMPLE Class   | MCKSX           |

### MainStay Moderate Allocation Fund (Series ID: S000028533)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087355 | Investor Class | MMRDX           |
| C000087356 | Class A        | MMRAX           |
| C000087357 | Class B        | MMRBX           |
| C000087358 | Class C        | MMRCX           |
| C000087359 | Class I        | MMRIX           |
| C000166841 | Class R3       | MMRHX           |
| C000210251 | Class R2       | MMRKX           |
| C000221662 | SIMPLE Class   | MMRSX           |

### MainStay Growth Allocation Fund (Series ID: S000028534)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087360 | Investor Class | MGDNX           |
| C000087361 | Class A        | MGDAX           |
| C000087362 | Class B        | MGDBX           |
| C000087363 | Class C        | MGDCX           |
| C000087364 | Class I        | MGDIX           |
| C000166842 | Class R3       | MGDRX           |
| C000210253 | Class R2       | MGDKX           |
| C000221663 | SIMPLE Class   | MGDSX           |

### MainStay Equity Allocation Fund (Series ID: S000028535)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087365 | Investor Class | MGXNX           |
| C000087366 | Class A        | MGXAX           |
| C000087367 | Class B        | MGXBX           |
| C000087368 | Class C        | MGXCX           |
| C000087369 | Class I        | MGXIX           |
| C000166843 | Class R3       | MGXRX           |
| C000221664 | SIMPLE Class   | MGXSX           |

### MainStay Short Term Bond Fund (Series ID: S000028536)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087371 | Investor Class | MIXNX           |
| C000087372 | Class A        | MIXAX           |
| C000221665 | SIMPLE Class   | MIXMX           |

### MainStay MacKay Total Return Bond Fund (Series ID: S000028537)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087373 | Investor Class | MTMNX           |
| C000087374 | Class A        | MTMAX           |
| C000087375 | Class B        | MTMBX           |
| C000087376 | Class C        | MTMCX           |
| C000087377 | Class I        | MTMIX           |
| C000116270 | Class R1       | MTMRX           |
| C000116271 | Class R2       | MTRTX           |
| C000127150 | Class R6       | MTRDX           |
| C000166844 | Class R3       | MTRVX           |
| C000221666 | SIMPLE Class   | MTMSX           |

### MainStay WMC International Research Equity Fund (Series ID: S000028542)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000087393 | Investor Class | MYINX           |
| C000087394 | Class A        | MYITX           |
| C000087395 | Class C        | MYICX           |
| C000087396 | Class I        | MYIIX           |
| C000185938 | Class R6       | MYTDX           |

### MainStay Balanced Fund (Series ID: S000036714)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000112258 | Class A        | MBNAX           |
| C000112259 | Class B        | MBNBX           |
| C000112260 | Class C        | MBACX           |
| C000112261 | Class I        | MBAIX           |
| C000112262 | Class R1       | MBNRX           |
| C000112263 | Class R2       | MBCRX           |
| C000112264 | Class R3       | MBDRX           |
| C000112265 | Investor Class | MBINX           |
| C000185940 | Class R6       | MBERX           |

### MainStay WMC Small Companies Fund (Series ID: S000036715)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000112266 | Class B        | MOTBX           |
| C000112267 | Class C        | MOPCX           |
| C000112268 | Class I        | MOPIX           |
| C000112269 | Investor Class | MOINX           |
| C000112270 | Class A        | MOPAX           |
| C000118993 | Class R1       | MOPRX           |
| C000118994 | Class R2       | MOTRX           |
| C000166845 | Class R3       | MOVRX           |
| C000185942 | Class R6       | MOPDX           |

### MainStay MacKay New York Tax Free Opportunities Fund (Series ID: S000036992)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000113210 | Class A        | MNOAX           |
| C000113211 | Class C        | MNOCX           |
| C000113212 | Class I        | MNOIX           |
| C000113213 | Investor Class | MNOVX           |
| C000185944 | Class R6       | MNODX           |
| C000221672 | Class C2       | MNOLX           |

### MainStay MacKay Short Duration High Yield Fund (Series ID: S000039301)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000121097 | Class A        | MDHAX           |
| C000121098 | Class C        | MDHCX           |
| C000121099 | Class I        | MDHIX           |
| C000121100 | Class R2       | MDHRX           |
| C000121101 | Investor Class | MDHVX           |
| C000166846 | Class R3       | MDHTX           |
| C000185946 | Class R6       | MDHEX           |

### MainStay WMC Growth Fund (Series ID: S000039358)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000121293 | Class A        | KLGAX           |
| C000121294 | Class B        | KLGBX           |
| C000121295 | Class C        | KLGCX           |
| C000121296 | Class I        | KLGIX           |
| C000121297 | Class R2       | KLGRX           |
| C000121298 | Investor Class | KLGNX           |
| C000185948 | Class R6       | KLGDX           |

### MainStay MacKay California Tax Free Opportunities Fund (Series ID: S000039903)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000123763 | Class A        | MSCAX           |
| C000123764 | Class C        | MSCCX           |
| C000123765 | Class I        | MCOIX           |
| C000123766 | Investor Class | MSCVX           |
| C000185950 | Class R6       | MSODX           |
| C000221676 | Class C2       | MCAMX           |

### MainStay Epoch Capital Growth Fund (Series ID: S000054257)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000170407 | Class A        | MECDX           |
| C000170408 | Class C        | MECEX           |
| C000170409 | Class I        | MECFX           |
| C000170410 | Investor Class | MECVX           |

### MainStay Candriam Emerging Markets Equity Fund (Series ID: S000059215)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000194050 | Class A        | MCYAX           |
| C000194051 | Class C        | MCYCX           |
| C000194052 | Class I        | MCYIX           |
| C000194053 | Class R6       | MCYSX           |
| C000194055 | Investor Class | MCYVX           |

#### MAINSTAY FUNDS TRUST <br> 51 Madison Avenue <br> New York, NY 10010
March 1, 2023

<u>VIA EDGAR</u>

Securities and Exchange Commission<br>Division of Investment Management<br>100 F Street, N.E.<br>Washington, D.C. 20549<br>

Re: MainStay Funds Trust (the "Registrant")<br>SEC File Nos. 333-160918 and 811-22321

Dear Sir or Madam:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended ("1933 Act"), the Registrant hereby certifies that the Prospectuses and Statement of Additional Information that would have been filed under paragraph (c) of Rule 497 do not differ from those contained in Post-Effective Amendment No. 179 to the Registrant's Registration Statement on Form N-1A under the 1933 Act and Amendment No. 186 under the Investment Company Act of 1940, that became effective on February 28, 2023.

No fee is required in connection with this filing. Please direct any questions concerning the filing to the undersigned at 973-610-0124.

Very truly yours, <br>

/s/ Thomas C. Humbert

Thomas C. Humbert<br>Assistant Secretary

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