Short Interest in Specialty Pharma Names Ebb and Flow (VRX) (HZNP) (MNK)

Amid the Valeant Pharma (NYSE: VRX) controversy, investors are keeping a close eye on short interest in specialty pharma names. After the close, following the just released data, Guggenheim analyst Louise Chen offered some insight.

Data shows that Horizon Pharma (NASDAQ: HZNP) saw the largest increase in short interest at +57.9% over the two-week period ending 10/30/15, while Shire (NASDAQ: SHPG) saw the largest decrease at -51.8%.

Citron Research short targets Valeant and Mallinckrodt (NYSE: MNK) saw short interest rise rise 8.2% and 18.8%, respectively.

In addition to Shire, Endo Pharmaceuticals (NASDAQ: ENDP) saw a sharp drop of 30.6%.

Cooper (NYSE: COO), a stock not talked about much on trading desks, saw a sharp rise of 38.7%.

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