The investment committee of the Art Institute of Chicago's $320 million endowment will be looking early next month at decreasing its domestic equity investments, said Robert Mars, executive vice president. About 65% of the fund is in U.S. equities. The committee will take a look at its equity weighting due to the run-up in the stock market. Managers may be terminated, but it is too early to tell. William T. Kennedy is assisting.