Shares of Houston Exploration ( THX) were among the NYSE's winners Monday, rising 5% after the oil exploration company agreed to be acquired by Forest Oil ( FST) for $1.5 billion in cash and stock.

The deal works out to $52.47 a share, representing an 8% premium over Houston Exploration's Friday closing price of $48.69. The transaction is expected to close during the second quarter. Shares of Houston Exploration recently were up $2.32 to $51.01, while Forest Oil shares were down 88 cents to $30.34.

Shares of RadioShack ( RSH) jumped 12% after the consumer electronics retailer said that fourth-quarter earnings will be higher than a year earlier. During last year's fourth quarter, the company earned $51 million. RadioShack attributed the gain to improved margin and inventory management and lower SG&A expenses. Shares were trading up $2.09 to $18.90.

Schnitzer Steel ( SCHN) shares sank 7% after the recycled-metals company's first-quarter profit missed Wall Street's projection. For the quarter ended Nov. 30, Schnitzer earned $21 million, or 69 cents a share, down from $42 million, or $1.34 a share, a year earlier. Analysts anticipated a profit of 99 cents a share for the latest quarter. Revenue rose to $510 million from $341 million, missing Wall Street's expectation of $511.9 million. Shares were sliding $2.66 to $35.06.

Group 1 Automotive ( GPI) fell 3% after the auto dealer offered a 2007 earnings guidance below Wall Street's expectation. The company expects earnings of $4 to $4.25 a share for the year. Analysts polled by Thomson First Call, meanwhile, project earnings of $4.28 a share. Group 1 forecast same-store revenue growth of 1% to 2%. Shares were trading down $1.60 to $48.21.

Shares of MarineMax ( HZO) plunged 15% after the boat retailer slashed its fiscal 2007 earnings guidance. The company now sees earnings of $1.40 to $1.50 a share for the year ending Sept. 30. Previously, the company forecast earnings of $2.05 to $2.15 a share. Analysts project earnings of $2.11 a share.

For the first quarter, MarineMax estimates a loss of 20 cents to 25 cents a share, with revenue of about $235 million. Analysts, on average, project a loss of 6 cents a share and revenue of $234.3 million. Shares were trading down $3.70 to $21.07.

CompuCredit ( CCRT) fell 5% after the financial services company lowered its fourth-quarter earnings estimate. The company expects earnings to be 20% below its previous forecast of 50 cents a share. Analysts, on average, project earnings of 51 cents a share.

CompuCredit attributed the revision to higher marketing costs, increased expenses associated with new products, weaker-than-expected results in its auto finance segment and accelerated depreciation of leasehold improvements. CompuCredit said these issues don't change its outlook for 2007. Shares were trading at $37.65, down $1.77.

NYSE volume leaders included EMC ( EMC), up 38 cents to $13.99; Motorola ( MOT), down 40 cents to $18.54; Ford ( F), up 4 cents to $7.66; Pfizer ( PFE), down 33 cents to $25.97; AT&T ( T), down 20 cents to $33.40; and Corning ( GLW), down 29 cents at $18.75.

Nasdaq volume leaders included Level 3 Communications ( LVLT), up 15 cents to $6.08; Intel ( INTC), up 4 cents to $21.14; Cisco Systems ( CSCO), up 5 cents to $28.52; Microsoft ( MSFT), up 9 cents to $29.73; Apple Computer ( AAPL), up 56 cents to $85.65; Tellabs ( TLAB), down 46 cents to $10.26; and eBay ( EBAY), down $1.28 to $29.50.

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