shares of merck  co inc mrk inched 003 higher to 7491 tuesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 190 to 456700 and dow jones industrial average djia falling 186 to 3448372 the stocks rise snapped a threeday losing streak merck  co inc closed 1649 below its 52week high 9140 which the company achieved on november 4th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as johnson  johnson jnj fell 239 to 15593 roche holding ag part cert rhhvf fell 128 to 38500 and pfizer inc pfe rose 254 to 5373 trading volume 297 m eclipsed its 50day average volume of 161 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