iShares S&P 500 Index Fund Investor A Shares Fonds

The investment seeks to provide investment results that correspond to the total return performance of publicly-traded common stocks in the aggregate, as represented by the Standard & Poor's 500® Index. The fund is a "feeder" fund that invests all of its assets in the Master Portfolio of MIP, which has the same investment objective and strategies as the fund. At least 90% of the value of the fund's assets is invested in securities comprising the S&P 500 Index. The percentage of the fund's assets invested in a given stock is approximately the same as the percentage such stock represents in the S&P 500 Index.