shares of merck  co inc mrk inched 015 higher to 11127 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 153 to 398637 and dow jones industrial average djia falling 172 to 3285646 this was the stocks second consecutive day of gains merck  co inc closed 422 short of its 52week high 11549 which the company reached on january 6th the stock outperformed some of its competitors tuesday as johnson  johnson jnj fell 094 to 15409 and pfizer inc pfe fell 187 to 4034 trading volume 138 m eclipsed its 50day average volume of 81 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