shares of blackrock inc blk slid 086 to 60928 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 013 to 375989 and dow jones industrial average djia falling 015 to 3048313 blackrock inc closed 36388 below its 52week high 97316 which the company reached on november 12th the stock underperformed when compared to some of its competitors wednesday as bank of america corp bac fell 076 to 3260 invesco ltd ivz rose 024 to 1660 and affiliated managers group inc amg fell 060 to 11692 trading volume 942811 remained 119996 below its 50day average volume of 11 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