shares of wr berkley corp wrb slid 069 to 5730 thursday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 062 to 429393 and the dow jones industrial average djia rising 050 to 3383361 wr berkley corp closed 1969 below its 52week high 7699 which the company achieved on december 1st the stock underperformed when compared to some of its competitors thursday as chubb ltd cb fell 051 to 19160 progressive corp pgr rose 018 to 13108 and travelers cos inc trv rose 007 to 17491 trading volume 972792 remained 833794 below its 50day average volume of 18 m 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