shares of mckesson corp mck slid 027 to 41480 friday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 029 to 439895 and dow jones industrial average djia falling 055 to 3373488 this was the stocks fourth consecutive day of losses mckesson corp closed 1495 below its 52week high 42975 which the company achieved on june 30th the stock demonstrated a mixed performance when compared to some of its competitors friday as amazoncom inc amzn rose 111 to 12978 unitedhealth group inc unh fell 166 to 46158 and cvs health corp cvs fell 053 to 6917 trading volume 665833 remained 259074 below its 50day average volume of 924907 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