shares of merck  co inc mrk inched 017 higher to 10897 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 143 to 399056 and the dow jones industrial average djia rising 158 to 3400504 merck  co inc closed 240 short of its 52week high 11137 which the company reached on december 9th the stock underperformed when compared to some of its competitors monday as johnson  johnson jnj rose 119 to 17784 and pfizer inc pfe rose 085 to 5216 trading volume 110 m eclipsed its 50day average volume of 94 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