shares of wr berkley corp wrb advanced 107 to 8148 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 075 to 463409 and dow jones industrial average djia falling 030 to 3554418 wr berkley corp closed 345 short of its 52week high 8493 which the company reached on november 23rd the stock outperformed some of its competitors tuesday as arch capital group ltd acgl rose 092 to 4375 alleghany corp y rose 014 to 67592 and american financial group inc afg rose 090 to 13828 trading volume 813979 eclipsed its 50day average volume of 593655 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