shares of vertex pharmaceuticals inc vrtx sank 007 to 29407 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 115 to 385443 and dow jones industrial average djia falling 052 to 3117384 the stocks fall snapped a sevenday winning streak vertex pharmaceuticals inc closed 167 short of its 52week high 29574 which the company reached on july 8th the stock underperformed when compared to some of its competitors monday as johnson  johnson jnj rose 004 to 17835 merck  co inc mrk rose 164 to 9430 and abbvie inc abbv rose 025 to 15323 trading volume 15 m remained 324804 below its 50day average volume of 18 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