shares of mckesson corp mck slid 142 to 31523 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 356 to 414687 and dow jones industrial average djia falling 312 to 3299797 the stocks fall snapped a twoday winning streak mckesson corp closed 2037 short of its 52week high 33560 which the company achieved on april 21st the stock demonstrated a mixed performance when compared to some of its competitors thursday as cerner corp cern fell 026 to 9412 amerisourcebergen corp abc fell 102 to 15519 and cardinal health inc cah fell 433 to 5787 trading volume 11 m remained 100288 below its 50day average volume of 13 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