SRL for [joined]: Bowing to criticism , Bear Stearns , Morgan Stanley and Oppenheimer [joined] Paine Webber in suspending stock - index arbitrage trading for their own accounts .
ARG-0: Bear Stearns , Morgan Stanley and Oppenheimer | ARG-1: Paine Webber | ARG-M-PRD: in suspending stock - index arbitrage trading for their own accounts