<SEC-DOCUMENT>0001741773-21-002936-index.html : 20210930
<SEC-HEADER>0001741773-21-002936.hdr.sgml : 20210930
<ACCEPTANCE-DATETIME>20210929175502
ACCESSION NUMBER:		0001741773-21-002936
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210930
DATE AS OF CHANGE:		20210929
EFFECTIVENESS DATE:		20210930

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MAINSTAY FUNDS
		CENTRAL INDEX KEY:			0000787441
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-02610
		FILM NUMBER:		211292950

	BUSINESS ADDRESS:	
		STREET 1:		51 MADISON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		2125767000

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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS MAINSTAY SERIES FUND /NY/
		DATE OF NAME CHANGE:	19911126

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MACKAY SHIELDS SERIES FUND
		DATE OF NAME CHANGE:	19860506
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<CLASS-CONTRACT-ID>C000221692
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<OWNER-CIK>0000787441
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<SERIES-NAME>MainStay MacKay Tax Free Bond Fund
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<CLASS-CONTRACT-NAME>Class A
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<CLASS-CONTRACT-NAME>Class C
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<CLASS-CONTRACT-NAME>INVESTOR CLASS
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<CLASS-CONTRACT-ID>C000082082
<CLASS-CONTRACT-NAME>Class I
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<CLASS-CONTRACT-ID>C000185560
<CLASS-CONTRACT-NAME>Class R6
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<CLASS-CONTRACT-ID>C000221693
<CLASS-CONTRACT-NAME>Class C2
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<OWNER-CIK>0000787441
<SERIES-ID>S000006899
<SERIES-NAME>MainStay MacKay Convertible Fund
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<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>c497.htm
<DESCRIPTION>AMENDED SAI DATED 9-30-21
<TEXT>
Document 1 - file: c497.htm

</DOCUMENT>
</SEC-DOCUMENT>