Monday's Small-Cap Winners & Losers

Small-cap stocks got dinged along with the major indices Monday, selling off hard in the opening hour of trading and then mostly staying in the red. The Russell 2000 slipped 0.7% to 725.14, and the S&P SmallCap 600 sank 1% to 380.64.

Heading up the losers, car rental company Dollar Thrifty (DTG Quote) lost 35% to $16.89 after slashing 2007 guidance Friday after the close. The Tulsa, Okla.-based company now predicts adjusted earnings ranging from 90 cents to 95 cents a share, down from a previous forecast of $1.75 to $1.85 a share. Analysts polled by Thomson Financial have been expecting a profit of $1.82 a share.

Also falling on lowered guidance was Virgin Mobile (VM Quote). The Warren, N.J., wireless company predicts a full-year 2007 loss of $3 million to $6 million. The Street is looking for a loss of $3.5 million.

Several retailers lost ground on downgrades from Thomas Weisel. The bank downgraded Sandpoint, Idaho's Coldwater Creek (CWTR Quote) to underweight from market weight and cut its price target to $4 a share from $6 a share. The stock stumbled 16% to $5.90.

Charming Shoppes (CHRS Quote) suffered similarly, losing 16% to $5.81 after Thomas Weisel dropped the Bensalem, Pa., company to market weight from overweight, while maintaining its $6 price target. Charming Shoppes made national headlines over the weekend due to a fatal shooting at one of its Illinois stores Saturday.

Several companies managed to eke out gains on the tough day. Shares of Austin, Texas-based semiconductor company SigmaTel (SGTL Quote) skyrocketed 60% to $2.86 on news that privately held Freescale Semiconductor will buy the company for $110 million, or $3 a share in cash.

Activist investor Carl Icahn helped drive up the value of two small-caps when he bought a 9.5% stake in Greenbrier (GBX Quote). Icahn further expressed interest in a merger between the Oswego, Ore., railcar maker and St. Charles, Mo.-based American Railcar (ARII Quote). Shares of Greenbrier jumped 20% to $25.00, while American Railcar climbed 17% to $20.70.

For more info on stocks held by Icahn, check out the Carl Icahn portfolio at Stockpickr.com.