shares of marathon oil corp mro shed 630 to 2113 tuesday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx rising 016 to 383139 and the dow jones industrial average djia falling 042 to 3096782 marathon oil corp closed 1211 short of its 52week high 3324 which the company achieved on may 31st the stock underperformed when compared to some of its competitors tuesday as exxon mobil corp xom fell 313 to 8481 and chevron corp cvx fell 263