shares of blackrock inc blk slumped 032 to 73859 friday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 117 to 446312 and the dow jones industrial average djia rising 080 to 3475493 the stocks fall snapped a fourday winning streak blackrock inc closed 23457 below its 52week high 97316 which the company reached on november 12th the stock demonstrated a mixed performance when compared to some of its competitors friday as bank of america corp bac fell 030 to 4290 invesco ltd ivz rose 047 to 2140 and affiliated managers group inc amg fell 157 to 14267 trading volume 12 m eclipsed its 50day average volume of 909642 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