shares of regeneron pharmaceuticals inc regn slid 108 to 68344 thursday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 199 to 405784 and the dow jones industrial average djia rising 161 to 3263719 the stocks fall snapped a fourday winning streak regeneron pharmaceuticals inc closed 6398 below its 52week high 74742 which the company reached on april 8th the stock underperformed when compared to some of its competitors thursday as johnson  johnson jnj fell 009 to 17946 novartis ag adr nvs rose 001 to 9126 and amgen inc amgn rose 002 to 25305 trading volume 523279 remained 126452 below its 50day average volume of 649731 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