shares of merck  co inc mrk rose 116 to 8164 monday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 005 to 3561925 and the sp 500 index spx falling 032 to 468294 merck  co inc closed 976 below its 52week high 9140 which the company reached on november 4th the stock outperformed some of its competitors monday as johnson  johnson jnj fell 132 to 15970 roche holding ag part cert rhhvf fell 112 to 39251 and pfizer inc pfe rose 079 to 5120 trading volume 108 m remained 60 million below its 50day average volume of 167 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