Aeropostale is downgraded to 'neutral,' and Warner Chilcott is upgraded to 'buy.'
Amgen, Celgene and Pharmacyclics see short interest drop recently.
There's mixed interest in biotech, biopharmaceutical and emerging pharma companies.
The classification of ibrutinib as a breakthrough therapy could mean speedy approval by the agency.
Stocks are mixed as investors appear content to sit on the sidelines on the eve of Election Day.
Some of the hot categories of the year to date include health care and emerging-market debt.
Autodesk is downgraded at 2 firms, and General Growth is downgraded to 'neutral.'
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