shares of mckesson corp mck slumped 039 to 20110 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 008 to 435419 and dow jones industrial average djia falling 015 to 3391984 this was the stocks fourth consecutive day of losses mckesson corp closed 890 short of its 52week high 21000 which the company reached on august 5th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as cerner corp cern fell 046 to 7335 amerisourcebergen corp abc fell 039 to 12150 and cardinal health inc cah fell 099 to 5104 trading volume 687537 remained 327888 below its 50day average volume of 10 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