shares of arthur j gallagher  co ajg rose 158 to 19390 friday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 189 to 397261 and the dow jones industrial average djia rising 100 to 3337549 the stocks rise snapped a threeday losing streak arthur j gallagher  co closed 761 below its 52week high 20151 which the company achieved on december 2nd the stock underperformed when compared to some of its competitors friday as marsh  mclennan cos mmc rose 208 to 17312 trading volume 793383 eclipsed its 50day average volume of 749655 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