There has been a lot of buzz in recent days about the idea of a bubble in the biotech space on the market today. The iShares NASDAQ Biotechnology Index (NASDAQ:IBB), an ETF that tracks a range of companies in the biotech space, peaked exactly a month ago, and has since lost 12% of its value, falling 3% in a single day yesterday. Investors are understandably concerned that the sell-off will lead to a continued decline in the days ahead.

In this video, Motley Fool health-care analyst David Williamson discusses why there may be some validity to the speculation of a bubble in this sector at the moment. David then gives investors his three top picks for which companies he would jump in on if a biotech pullback offered a lower price point, and why these three pharmaceutical businesses have the underlying strength to survive any market condition.

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.