Brokerage firm made presentations to plan trustees recapping performance of investments, advising the trustees which investments to hold and which to sell Brokerage firm made presentations to plan trustees recapping performance of investments, advising the trustees which investments to hold and which to sell, and offering the trustees a choice of recommended investments. Plan lost 30% of funds invested in securities recommended by brokerage firm. Pursued ERISA fiduciary action against brokerage firm to recover losses.