X0101 EFFECT 33 LIVE 2016-12-27 16:15:00

N-14

0000787441 MAINSTAY FUNDS 333-214498 0000787441 MAINSTAY FUNDS S000006896 MainStay High Yield Corporate Bond Fund C000018693 Class A 0001469192 MAINSTAY FUNDS TRUST S000028541 MainStay High Yield Opportunities Fund C000087390 Class A 0000787441 MAINSTAY FUNDS S000006896 MainStay High Yield Corporate Bond Fund C000018695 Class C 0001469192 MAINSTAY FUNDS TRUST S000028541 MainStay High Yield Opportunities Fund C000087391 Class C 0000787441 MAINSTAY FUNDS S000006896 MainStay High Yield Corporate Bond Fund C000018696 Class I 0001469192 MAINSTAY FUNDS TRUST S000028541 MainStay High Yield Opportunities Fund C000087392 Class I 0000787441 MAINSTAY FUNDS S000006896 MainStay High Yield Corporate Bond Fund C000060792 INVESTOR CLASS 0001469192 MAINSTAY FUNDS TRUST S000028541 MainStay High Yield Opportunities Fund C000087389 Investor Class