shares of marsh  mclennan cos mmc slid 013 to 18665 wednesday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 074 to 447216 and the dow jones industrial average djia rising 025 to 3434743 marsh  mclennan cos closed 237 short of its 52week high 18902 which the company reached on june 30th the stock demonstrated a mixed performance when compared to some of its competitors wednesday as accenture plc cl a acn rose 171 to 31388 chubb ltd cb fell 095 to 19028 and american international group inc aig fell 017 to 5865 trading volume 15 m remained 167735 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