shares of arthur j gallagher  co ajg shed 074 to 20508 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 073 to 411524 and dow jones industrial average djia falling 077 to 3279992 this was the stocks third consecutive day of losses arthur j gallagher  co closed 1415 below its 52week high 21923 which the company achieved on may 15th despite its losses the stock outperformed some of its competitors wednesday as marsh  mclennan cos mmc fell 077 to 17305 trading volume 624426 remained 362853 below its 50day average volume of 987279 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