shares of vertex pharmaceuticals inc vrtx shed 149 to 34269 tuesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 047 to 438871 and dow jones industrial average djia falling 072 to 3405387 this was the stocks second consecutive day of losses vertex pharmaceuticals inc closed 1177 short of its 52week high 35446 which the company achieved on may 2nd the stock underperformed when compared to some of its competitors tuesday as abbvie inc abbv fell 059 to 13782 krystal biotech inc krys rose 274 to 12477 and arcturus therapeutics holdings inc arct fell 034 to 2610 trading volume 12 m remained 8827 below its 50day average volume of 12 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