Is A Fall Imminent For Regeneron Stock After A Stellar 25% Rise In A Week?

Regeneron Pharmaceuticals stock (NASDAQ: REGN) is up a solid 25% in a week, while it has seen a 16% rise in a month, significantly outperforming the broader indices, with the S&P500 index rising 3.7% in a week but down 3.2% in a month.