X0101 EFFECT 33 LIVE 2015-05-01 0001193125-15-161701 485APOS 0000866256 PARNASSUS INCOME FUNDS 033-36065 S000000856 Parnassus Core Equity Fund C000002471 Investor Shares S000000856 Parnassus Core Equity Fund C000102327 Institutional Shares S000000857 Parnassus Fixed Income Fund C000002472 Investor Shares S000000857 Parnassus Fixed Income Fund C000156017 Institutional Shares