shares of arthur j gallagher  co ajg dropped 011 to 18520 thursday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 008 to 3333667 and the sp 500 index spx falling 007 to 420727 the stocks fall snapped a fourday winning streak arthur j gallagher  co closed 182 below its 52week high 18702 which the company achieved on april 21st the stock underperformed when compared to some of its competitors thursday as marsh  mclennan cos mmc rose 032 to 17023 willis towers watson plc wtw rose 050 to 21645 and brown  brown inc bro rose 026 to 6654 trading volume 11 m eclipsed its 50day average volume of 812183 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