MainStay DefinedTerm Municipal Opportunities Fund Declares Monthly Dividend Distributions for the Months of October, November and December

NEW YORK, Oct. 2, 2017

Portfolio and municipal market commentary will be published on or around October 15, 2017 at www.mainstayinvestments.com/mmd.

Dividend Distribution Schedule:

Month	Declaration Date	Ex-Date	Record Date ARIVA.DE Börsen-Geflüster Kurse MAINSTAY DEFINED TERM MUNI OPPT FD SBI USD0.001 16,08 $ -0,19%	Payable Date
October	10/2/2017	10/13/2017	10/16/2017	10/31/2017
November	10/2/2017	11/14/2017	11/15/2017	11/30/2017
December	10/2/2017	12/14/2017	12/15/2017	12/29/2017

The Fund's dividend will be derived from its monthly undistributed net investment income and is not expected to contain any return of principal.

The Fund's daily New York Stock Exchange closing prices, net asset values per share, as well as other information, are available at www.mainstayinvestments.com/mmd or by calling the Fund's shareholder servicing agent at (855) 456-9683.

To subscribe to the Monthly MainStay Muni Monitor to receive monthly perspectives from MacKay Municipal Managers™, go to www.mainstayinvestments.com/munis  and enter your email address.

There are risks inherent in any investment, including market risk, interest rate risk, credit risk and the possible loss of principal. There can be no assurance that the Fund's investment objectives will be achieved. Shares of closed-end funds frequently trade at a discount from their net asset value, which may increase investor risk.

About MainStay Funds
MainStay is the mutual fund family of New York Life Insurance Company. MainStay provides access to a powerful mix of autonomous, institutional investment managers, delivered by experienced professionals who understand the needs of today's investors. For more information on MainStay, please visit mainstayinvestments.com.

About MacKay Shields LLC
MacKay Shields LLC ("MacKay") serves as the Fund's investment sub-advisor. MacKay is an indirect wholly-owned subsidiary of New York Life Insurance Company and a wholly-owned subsidiary of New York Life Investment Management Holdings LLC. MacKay is a fixed-income focused investment management firm with $97 billion in assets under management as of June 30, 2017. MacKay manages fixed income strategies for high-net worth individuals, institutional clients, and mutual funds, including unconstrained bond, global high yield, high yield, high yield active core, municipal high yield, short duration high yield, low volatility high yield, municipal short term, core investment grade, municipal investment grade, core plus, core plus opportunities, convertibles, emerging markets credit, and bank loans.

Media Contact:
Allison Scott | New York Life | 212-576-4517 | allison_scott@newyorklife.com

Investors Contact:
855-456-9683 

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SOURCE New York Life Investment Management