X0101 EFFECT 33 LIVE 2023-01-23 16:30:00

N-1A

0001676326 Morgan Stanley ETF Trust 333-266913 S000077958 Calvert International Responsible Index ETF C000238675 Calvert International Responsible Index ETF S000077959 Calvert US Large-Cap Core Responsible Index ETF C000238676 Calvert US Large-Cap Core Responsible Index ETF S000077960 Calvert US Large-Cap Diversity, Equity and Inclusion Index ETF C000238677 Calvert US Large-Cap Diversity, Equity and Inclusion Index ETF S000077961 Calvert US Mid-Cap Core Responsible Index ETF C000238678 Calvert US Mid-Cap Core Responsible Index ETF S000077962 Calvert US Select Equity ETF C000238679 Calvert US Select Equity ETF S000077963 Calvert Ultra-Short Investment Grade ETF C000238680 Calvert Ultra-Short Investment Grade ETF