NEW YORK (

TheStreet

) --

Siga Technologies

(Nasdaq:

SIGA

) is trading at unusually high volume Tuesday with two million shares changing hands. It is currently at four times its average daily volume and trading down $1.23 (-10.2%) at $10.87 as of 3:52 p.m. ET.

Siga has a market cap of $625.2 million and is part of the

health care

sector and

drugs

industry. Shares are down 13.6% year to date as of the close of trading on Monday.

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

sell

. Among the areas we feel are negative, one of the most important has been weak operating cash flow. You can view the full

Siga Ratings Report

.

See all heavy volume stocks in our

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