NEW YORK ( TheStreet) -- Siga Technologies (Nasdaq: SIGA) is trading at unusually high volume Wednesday with 1.8 million shares changing hands. It is currently at four times its average daily volume and trading up $1.42 (+11.2%) at $14.16 as of 2:07 p.m. ET. Siga has a market cap of $644.4 million and is part of the health care sector and drugs industry. Shares are down 9% year to date as of the close of trading on Tuesday. SIGA Technologies, Inc., a bio-defense company, engages in the discovery, development, and commercialization of products for use in defense against biological warfare agents comprising smallpox and arenaviruses. TheStreet Ratings rates Siga as a hold. The company's strengths can be seen in multiple areas, such as its solid stock price performance, largely solid financial position with reasonable debt levels by most measures and notable return on equity. However, as a counter to these strengths, we also find weaknesses including deteriorating net income, weak operating cash flow and feeble growth in the company's earnings per share. You can view the full Siga Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.