The CPF Investment Scheme (CPFIS) allows CPF members to invest part of their CPF-OA, SA and or SRS savings into Unit Trusts. To invest with CPF-OA or SRS, simply open a CPF SRS Investment Account with one of the 3 CPF agent banks (DBS POSB, UOB, or OCBC). Note: If you want to invest only the monies in your CPF Special Account (CPF-SA), you are not required to open a CPF Investment Account.