X0101 EFFECT 33 LIVE 2020-03-13 11:00:00

N-14

0001469192 MAINSTAY FUNDS TRUST 333-235813 0001469192 MAINSTAY FUNDS TRUST S000067318 MainStay CBRE Global Infrastructure Fund C000216482 Class C 0001469192 MAINSTAY FUNDS TRUST S000045769 MainStay Cushing Renaissance Advantage Fund C000142695 Class C 0001469192 MAINSTAY FUNDS TRUST S000067318 MainStay CBRE Global Infrastructure Fund C000216483 Class I 0001469192 MAINSTAY FUNDS TRUST S000045769 MainStay Cushing Renaissance Advantage Fund C000142696 Class I 0001469192 MAINSTAY FUNDS TRUST S000067318 MainStay CBRE Global Infrastructure Fund C000216485 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000045769 MainStay Cushing Renaissance Advantage Fund C000142697 Investor Class 0001469192 MAINSTAY FUNDS TRUST S000067318 MainStay CBRE Global Infrastructure Fund C000216486 Class A 0001469192 MAINSTAY FUNDS TRUST S000045769 MainStay Cushing Renaissance Advantage Fund C000142694 Class A