shares of vertex pharmaceuticals inc vrtx sank 085 to 34741 friday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 016 to 412408 and dow jones industrial average djia falling 003 to 3330062 vertex pharmaceuticals inc closed 705 below its 52week high 35446 which the company reached on may 2nd the stock demonstrated a mixed performance when compared to some of its competitors friday as abbvie inc abbv rose 038 to 14715 krystal biotech inc krys fell 238 to 8816 and arcturus therapeutics holdings inc arct fell 550 to 3058 trading volume 509222 remained 587064 below its 50day average volume of 11 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