The following video is part of our "Motley Fool Conversations" series, in which health-care editor/analyst David Williamson and industrials editor/analyst Isaac Pino discuss topics across the investing world.

In this video, David and Isaac discuss two biotechs that have recently seen shares soar. Regeneron has been on a tear and seemingly can't raise Eylea guidance fast enough. Amarin is well off 52-week highs, but bad news for a competitor is good news for Amarin. Can both stocks keep the runs going, or should investors stay on the sidelines post-pop? Watch and find out.

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This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.