The original mandate for MPSIF called for a family of three equity investment funds (the "sub-funds") each pursuing their own separate investment theme. In conjunction with the Advisory Board, the inaugural student class selected the following three sub-funds:
- Growth Fund
- Small Cap Fund
- Value Fund
Each sub-fund received an initial allocation of $600,000 from the donor's gift. The remaining $200,000 from the two million dollar gift is separately managed by Stern, from which funds may be used to pay for administrative expenses associated with the operation of MPSIF.
In May 2002, in order to improve its operating efficiency, MPSIF established a separate Fixed Income Advisory Group to manage a Fixed Income Fund. The Fixed Income Fund is staffed by students who also are members of a MPSIF equity funds.