shares of marsh  mclennan cos mmc slumped 001 to 16225 wednesday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx rising 014 to 399201 and the dow jones industrial average djia falling 018 to 3279840 this was the stocks second consecutive day of losses marsh  mclennan cos closed 2089 short of its 52week high 18314 which the company reached on april 21st despite its losses the stock outperformed some of its competitors wednesday as accenture plc cl a acn fell 020 to 26366 chubb ltd cb fell 166 to 20337 and american international group inc aig fell 195 to 5735true trading volume 13 m remained 198306 below its 50day average volume of 15 m editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use