shares of marsh  mclennan cos mmc shed 110 to 17810 wednesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 119 to 415877 and the dow jones industrial average djia rising 124 to 3342077 this was the stocks second consecutive day of losses marsh  mclennan cos closed 433 below its 52week high 18243 which the company reached on may 1st the stock underperformed when compared to some of its competitors wednesday as accenture plc cl a acn rose 195 to 28463 chubb ltd cb fell 034 to 19893 and american international group inc aig rose 273 to 5374 trading volume 17 m remained 53956 below its 50day average volume of 17 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