Why Did Regeneron Pharmaceuticals’ Stock Price Rise Last Week?

On March 28, 2018, Regeneron Pharmaceuticals (REGN) was trading at $344.36, a ~9.8% rise from its 52-week low of $313.53. On March 29, Regeneron stock closed at $344.36, which represented a ~7.2% rise from its share price in the week ended March 23, 2017. On March 21, 2018, Regeneron Pharmaceuticals announced a collaboration agreement with Alnylam Pharmaceuticals (ALNY) for the identification of RNA interference therapeutics for the treatment of chronic liver disease NASH (non-alcoholic steatohepatitis) and other related diseases.