Stephens College endowment fund, Columbia, Mo., hired the Stratevest Group to manage 25% of its $18 million in assets. Stratevest was hired as a balanced manager, said Gordon Afdahl, associate vice president and controller. NationsBank had been the fund's sole investment manager. It will continue to manage 75% of the fund in a balanced strategy. NationsBank subsidiary TradeStreet will run the equity portion. The search was conducted in-house.