X0101 EFFECT 33 LIVE 2013-07-24 10:00:00

N-14

0000701039 CALVERT FUND 333-189509 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000205355 FIRST VARIABLE RATE FUND FOR GOVERNMENT INCOME /MD/ S000000111 First Government Money Market Fund C000000248 Class O 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000205355 FIRST VARIABLE RATE FUND FOR GOVERNMENT INCOME /MD/ S000000111 First Government Money Market Fund C000000249 Class B 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000205355 FIRST VARIABLE RATE FUND FOR GOVERNMENT INCOME /MD/ S000000111 First Government Money Market Fund C000000250 Class C 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000319676 CALVERT TAX FREE RESERVES S000005138 Money Market Portfolio C000014072 Class O 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000356682 CALVERT SOCIAL INVESTMENT FUND S000008716 Calvert Money Market Portfolio C000023753 Money Market Portfolio 0000701039 CALVERT FUND S000013508 Calvert Ultra-Short Income Fund C000036621 Class A 0000701219 CALVERT CASH RESERVES S000005142 Institutional Prime Fund C000014076 Class I