shares of merck  co inc mrk advanced 211 to 9232 monday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 008 to 3222342 and the sp 500 index spx falling 039 to 400801 merck  co inc hit a new 52week high surpassing its previous peak of 9140 which the company reached on november 4th the stock outperformed some of its competitors monday as johnson  johnson jnj rose 070 to 17808 roche holding ag part cert rhhvf fell 009 to 31550 and pfizer inc pfe rose 150 to 5067 trading volume 140 m eclipsed its 50day average volume of 113 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