shares of marsh  mclennan cos mmc slumped 045 to 17972 monday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx rising 002 to 419263 and the dow jones industrial average djia falling 042 to 3328658 marsh  mclennan cos closed 271 short of its 52week high 18243 which the company achieved on may 1st the stock demonstrated a mixed performance when compared to some of its competitors monday as accenture plc cl a acn rose 036 to 29095 chubb ltd cb fell 148 to 19820 and american international group inc aig rose 020 to 5396 trading volume 14 m remained 367043 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