shares of wr berkley corp wrb slid 053 to 7296 wednesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 128 to 396961 and the dow jones industrial average djia rising 080 to 3397301 wr berkley corp closed 403 below its 52week high 7699 which the company reached on december 1st the stock demonstrated a mixed performance when compared to some of its competitors wednesday as chubb ltd cb fell 007 to 22461 progressive corp pgr fell 058 to 13225 and travelers cos inc trv rose 021 to 19163 trading volume 900833 remained 347099 below its 50day average volume of 12 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