shares of merck  co inc mrk advanced 303 to 7949 tuesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 074 to 451963 and the dow jones industrial average djia rising 056 to 3545731 merck  co inc closed 507 below its 52week high 8456 which the company reached on october 4th the stock outperformed some of its competitors tuesday as johnson  johnson jnj rose 234 to 16387 roche holding ag part cert rhhvf fell 128 to 38500 and pfizer inc pfe rose 186 to 4209 trading volume 156 m eclipsed its 50day average volume of 143 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