shares of merck  co inc mrk inched 074 higher to 9300 tuesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 202 to 408885 and the dow jones industrial average djia rising 134 to 3265459 this was the stocks second consecutive day of gains merck  co inc hit a new 52week high surpassing its previous peak of 9287 which the company reached on may 16th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as johnson  johnson jnj rose 042 to 17882 roche holding ag part cert rhhvf rose 226 to 32262 and pfizer inc pfe rose 132 to 5134 trading volume 176 m eclipsed its 50day average volume of 114 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