Not every company in biotech land is loved by investors. In fact, many biotechs top the list of companies with high short interest as a percentage of float.

As of the end of February, Myriad Genetics (NASDAQ:MYGN) was the second-most shorted company as a percentage of float. Sarepta Therapeutics (NASDAQ:SRPT) came in at No. 9. OncoMed Pharmaceuticals (NASDAQ:OMED)VIVUS (NASDAQ:VVUS), and MannKind (NASDAQ:MNKD) rounded out the top five most-shorted biotechs. 

In the slideshow below, you can see their metrics and reasons why some investors don't like them.

Fear not if your favorite biotech makes the list; Questcor Pharmaceuticals and Ziopharm Oncology, which were in last month's list, fell back in favor -- at least somewhat -- dropping off the top-five list.

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Brian Orelli and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.