shares of carmax inc kmx inched 085 higher to 8329 friday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 053 to 447803 and dow jones industrial average djia falling 043 to 3506562 carmax inc closed 2295 short of its 52week high 10624 which the company achieved on august 16th the stock demonstrated a mixed performance when compared to some of its competitors friday as carvana co cl a cvna fell 1226 to 4544 acv auctions inc acva fell 178 to 1654 and openlane inc kar rose 391 to 1543 trading volume 11 m remained 711976 below its 50day average volume of 18 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