shares of regeneron pharmaceuticals inc regn slid 176 to 69245 friday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 029 to 439895 and dow jones industrial average djia falling 055 to 3373488 this was the stocks fourth consecutive day of losses regeneron pharmaceuticals inc closed 14510 below its 52week high 83755 which the company achieved on april 5th the stock demonstrated a mixed performance when compared to some of its competitors friday as amgen inc amgn fell 194 to 21865 moderna inc mrna rose 049 to 11887 and gilead sciences inc gild fell 239 to 7442 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