shares of mckesson corp mck shed 110 to 24563 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 122 to 435645 and dow jones industrial average djia falling 019 to 3429773 mckesson corp closed 1122 below its 52week high 25685 which the company reached on january 13th the stock underperformed when compared to some of its competitors tuesday as cerner corp cern fell 037 to 9137 amerisourcebergen corp abc fell 037 to 13106 and cardinal health inc cah fell 012 to 5075 trading volume 862314 remained 110849 below its 50day average volume of 973163 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