Tuesday's Small-Cap Winners & Losers

ActivIdentity (ACTI) was one of Tuesday's small-cap winners as the Fremont, Calif.-based company said it landed major contracts from the Defense Department, the Army and the Air Force. Shares were trading up 56 cents, or 12.3%, to $5.10.

Government Properties Trust(GPT) surged on news the Omaha, Neb.-based REIT had agreed to be acquired by Record Realty Trust, an Australian company, for $10.75 a share in cash. The price represents a 17.2% premium over Government Properties' closing share price Monday. Shares were climbing $1.30, or 14.2%, to $10.47.

Arena Pharmaceuticals(ARNA) stumbled after the San Diego-based biopharmaceutical company was downgraded by A.G. Edwards to hold from buy. Shares were sinking $1.72, or 10.2%, to $15.19. ...