shares of carmax inc kmx inched 093 higher to 12749 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 138 to 479119 and the dow jones industrial average djia rising 098 to 3630238 the stocks rise snapped a twoday losing streak carmax inc closed 2849 below its 52week high 15598 which the company achieved on november 8th the stock underperformed when compared to some of its competitors monday as copart inc cprt rose 174 to 14873 autonation inc an rose 111 to 11336 and penske automotive group inc pag rose 228 to 10519 trading volume 14 m eclipsed 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