shares of arthur j gallagher  co ajg rallied 147 to 22406 monday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 090 to 451844 and the dow jones industrial average djia rising 116 to 3547313 arthur j gallagher  co closed 224 below its 52week high 22630 which the company achieved on august 4th the stock outperformed some of its competitors monday as marsh  mclennan cos mmc rose 130 to 19205 trading volume 525292 remained 323447 below its 50day average volume of 848739 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