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.