shares of carmax inc kmx advanced 625 to 9114 monday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 057 to 415538 and the dow jones industrial average djia rising 026 to 3306150 carmax inc closed 6484 short of its 52week high 15598 which the company achieved on november 8th the stock outperformed some of its competitors monday as copart inc cprt rose 115 to 11496 autonation inc an rose 330 to 11974 and penske automotive group inc pag rose 316 to 10813 trading volume 20 m eclipsed its 50day average volume of 19 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