shares of merck  co inc mrk rose 244 to 10035 monday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 089 to 395725 and dow jones industrial average djia falling 063 to 3353670 merck  co inc closed 341 below its 52week high 10376 which the company reached on november 9th the stock demonstrated a mixed performance when compared to some of its competitors monday as johnson  johnson jnj rose 157 to 17191 roche holding ag part cert rhhvf rose 077 to 32986 and pfizer inc pfe rose 345 to 4924 trading volume 90 m remained 196372 below its 50day average volume of 92 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