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NEW YORK ( TheStreet) -- Siga Technologies (Nasdaq: SIGA) hit a new 52-week low Thursday as it is currently trading at $4.60, below its previous 52-week low of $4.68 with 53,920 shares traded as of 9:41 a.m. ET. Average volume has been 710,600 shares over the past 30 days. Siga has a market cap of $249.4 million and is part of the health care sector and drugs industry. Shares are down 66.3% year to date as of the close of trading on Wednesday. SIGA Technologies, Inc., a bio-defense company, engages in the research, discovery, development, and commercialization of novel products for the prevention and treatment of infectious diseases.