shares of mckesson corp mck dropped 028 to 35437 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 020 to 378328 and dow jones industrial average djia falling 014 to 3027387 the stocks fall snapped a twoday winning streak mckesson corp closed 2086 short of its 52week high 37523 which the company reached on august 16th trading volume 499215 remained 482717 below its 50day average volume of 981932 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