XBRL Filings for The MainStay Funds

The following Funds are a series of The MainStay Funds:
MainStay Common Stock Fund, MainStay Convertible Fund, MainStay Emerging Markets Debt Fund, MainStay Government Fund, MainStay High Yield Corporate Bond Fund, MainStay Income Builder Fund, MainStay International Equity Fund, MainStay Large Cap Growth Fund, MainStay MAP Equity Fund, MainStay Money Market Fund, MainStay Tax Free Bond Fund, MainStay Unconstrained Bond Fund

Prospectus dated February 28, 2017
Reverse Supplement dated February 28, 2017, for MainStay MAP Equity Fund
Supplement dated February 28, 2017, for The MainStay Funds Class T Shares
Supplement dated February 28, 2017, for The MainStay Funds Class R6 Shares