shares of marsh  mclennan cos mmc sank 001 to 14918 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 021 to 364729 and dow jones industrial average djia falling 043 to 2913499 this was the stocks second consecutive day of losses marsh  mclennan cos closed 3396 below its 52week high 18314 which the company achieved on april 21st the stock underperformed when compared to some of its competitors tuesday as prudential plc pukpf rose 223 to 1010 willis towers watson plc wtw rose 001 to 20355 and arthur j gallagher  co ajg rose 016 to 16973 trading volume 15 m remained 133329 below its 50day average volume of 16 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