shares of vertex pharmaceuticals inc vrtx sank 051 to 33997 monday on what proved to be an allaround mixed trading session for the stock market with the sp 500 index spx rising 002 to 419263 and the dow jones industrial average djia falling 042 to 3328658 vertex pharmaceuticals inc closed 1449 short of its 52week high 35446 which the company achieved on may 2nd the stock underperformed when compared to some of its competitors monday as abbvie inc abbv fell 014 to 14490 krystal biotech inc krys rose 2235 to 11753 and arcturus therapeutics holdings inc arct rose 172 to 2719 trading volume 961647 remained 116380 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