shares of merck  co inc mrk advanced 132 to 10561 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 039 to 394994 and dow jones industrial average djia falling 013 to 3370028 this was the stocks fourth consecutive day of gains merck  co inc hit a new 52week high surpassing its previous peak of 10460 which the company reached on november 18th the stock outperformed some of its competitors monday as johnson  johnson jnj rose 051 to 17597 roche holding ag part cert rhhvf rose 054 to 31830 and pfizer inc pfe fell 010 to 4818 trading volume 89 m remained 451034 below its 50day average volume of 93 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