Shares of OMI ( OMM) were among the NYSE's winners Friday, jumping 14% after the operator of oil tankers said it is evaluating strategic alternatives.

The company said that its strategic alternatives include a sale, merger, or the continued execution of its operating plan. OMI has hired financial adviser Perella Weinberg Partners to help it with the process. Shares were trading up $3.17 to $26.10.

Manitowoc ( MTW) rose 8% after the maker of heavy-lifting equipment boosted its 2007 profit forecast. The company now sees earnings of $4.20 to $4.30 a share, up from an earlier projection of $3.85 to $4 a share. Analysts polled by Thomson First Call project earnings of $4.02 a share. For the first quarter, Manitowoc expects earnings to exceed Wall Street's forecast by about 10%. Analysts currently project earnings of 79 cents a share.

"All three of our business segments are performing well, but the operating leverage that strong current and near-term industry conditions have created for our crane segment are driving truly exceptional performance," the company said. Shares were adding $4.73 to $60.20.

Shares of AnnTaylor Stores ( ANN) climbed 6% after the women's clothing retailer posted better-than-expected fourth-quarter earnings. For the quarter ended Feb. 3, the company earned $21.5 million, or 31 cents a share, on revenue of $610.5 million. Analysts expected earnings of 29 cents a share and revenue of $610.8 million. During the year-earlier period, AnnTaylor earned $27.4 million, or 38 cents a share, on revenue of $574 million.

For 2007, AnnTaylor forecast earnings of $2.15 to $2.25 a share, above analysts' projection earnings of $2.11. The company also said that it would repurchase up to $300 million in stock. Shares were up $2.03 to $37.70.

Shares of FCStone Group ( FCSX) soared 22% on their first day of trading. The company, a provider of commodity risk management services, saw its initial public offering price 5.1 million shares at $24 a share, raising about $122 million. The pricing came in at the high end of the proposed range of $21 to $24 a share. BMO Capital Markets and Banc of America Securities led the underwriting syndicate. Shares were trading up $5.17 to $29.17.

Six Flags ( SIX) fell 4% after the theme park operator reported a wider fourth-quarter loss. The company posted a loss of $195.2 million, or $2.07 a share, on revenue of $104.3 million. Analysts expected a loss of $1.18 a share. A year earlier, Six Flags recorded a loss of $144.5 million, or $1.55 a share, on revenue of $104.5 million. Shares were down 26 cents to $6.22.

NYSE volume leaders included General Electric ( GE), up 9 cents to $34.61; Pfizer ( PFE), up 1 cent to $25; CVS ( CVS), down 42 cents to $32.92; Exxon Mobil ( XOM), down 16 cents to $70.53; AT&T ( T), up 16 cents to $37.10; Citigroup ( C), down 23 cents to $49.90; EMC ( EMC), up 11 cents to $13.04; and Time Warner ( TWX), up 5 cents to $19.49.

Nasdaq volume leaders included Microsoft ( MSFT), down 1 cent to $27.27; Intel ( INTC), down 4 cents to $19.10; Cisco Systems ( CSCO), up 1 cent to $25.82; Sun Microsystems ( SUNW), down 2 cents to $6.20; Accredited Home Lenders ( LEND), up $2.02 to $11.45; Oracle ( ORCL), down 3 cents to $16.69; Sirius Satellite Radio ( SIRI), down 4 cents to $3.26; and CMGI ( CMGI) down 2 cents to $1.90.