shares of regeneron pharmaceuticals inc regn rallied 145 to 60754 friday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 192 to 386316 and the dow jones industrial average djia rising 215 to 3128826 the stocks rise snapped a fourday losing streak regeneron pharmaceuticals inc closed 13988 short of its 52week high 74742 which the company reached on april 8th the stock demonstrated a mixed performance when compared to some of its