NEW YORK ( TheStreet) -- Regeneron Pharmaceuticals (Nasdaq: REGN) is trading at unusually high volume Wednesday with 3.7 million shares changing hands. It is currently at four times its average daily volume and trading down $15.86 (-12.4%) at $111.99 as of 3:45 p.m. ET. Regeneron has a market cap of $11.8 billion and is part of the health care sector and drugs industry. Shares are up 132.8% year to date as of the close of trading on Tuesday. Regeneron Pharmaceuticals, Inc., a biopharmaceutical company, discovers, develops, and commercializes medicines for the treatment of serious medical conditions in the United States. TheStreet Ratings rates Regeneron as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures and solid stock price performance. However, as a counter to these strengths, we also find weaknesses including weak operating cash flow, poor profit margins and disappointing return on equity. You can view the full Regeneron Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.