Shares of

Stamps.com

(STMP) - Get Report

were among the

Nasdaq's

winners Wednesday, rising 20% after the online seller of stamps posted better-than-anticipated fourth-quarter results.

The company earned $4.1 million, or 17 cents a share, in the fourth quarter, up from $1.5 million, or 6 cents a share, a year earlier. Sales rose to $20.6 million from $11.7 million. Analysts surveyed by Thomson First Call expected earnings of 14 cents a share and sales of $17.2 million. "We are very pleased with our fourth-quarter revenue and earnings growth," the company said. "PhotoStamps sales picked up dramatically in the fourth quarter as we hit full stride in our marketing programs and experienced seasonal strength around the holidays."

Looking ahead, Stamps.com sees 2006 earnings of 53 cents to 63 cents a share, or 65 cents to 75 cents a share excluding stock-based compensation costs. Analysts project earnings of 63 cents a share. The company predicts sales of $75 million to $90 million, in line with analysts' forecast of $78.3 million. Shares were trading up $5.02 to $30.19.

USEC

(USU)

slumped 10% after the company said it will no longer pay a dividend. The uranium processor said it plans to instead use the cash to fund the building of its American Centrifuge Plant from 2007 to 2011. USEC said it would have paid nearly $250 million in dividends over the next five years. "USEC believes these funds will produce a better return for shareholders by investing them in the American Centrifuge and therefore reduce external financing. The board said it anticipates that USEC will not pay a dividend until this essential project is complete," the company said. Shares were trading down $1.44 to $12.16.

Shares of

General Cable

(BGC)

climbed 13% after the maker of cable products posted fourth-quarter results that topped forecasts. The company reported a loss of $3.3 million, or 8 cents a share. Excluding one-time items, the company earned 29 cents a share, well above analysts' projection of 18 cents. The company reported sales of $617.5 million, compared with Wall Street's target of $553.7 million. During the year-earlier period, the company earned $25.7 million, or 53 cents a share, on sales of $485.3 million. Excluding items, the year-ago profit was 12 cents a share.

Looking ahead, General Cable sees first-quarter earnings of 23 cents to 29 cents a share and sales of $680 million to $700 million. Analysts project earnings of 22 cents a share on sales of $574.3 million. Shares were trading up $3.08 to $26.05.

Blue Nile

(NILE)

tumbled 19% after the online jewelry retailer posted lower-than-expected fourth-quarter results and offered a soft 2006 forecast. In the holiday quarter, the company earned $5.3 million, or 29 cents a share, on sales of $73.2 million. Analysts expected earnings of 33 cents a share and sales of $80.3 million. During the year-earlier period, the company earned $4.6 million, or 24 cents a share, on sales of $64.5 million.

Looking ahead, Blue Nile sees first-quarter earnings of 11 cents to 12 cents a share, including stock-based compensation costs of 3 cents to 4 cents a share. The company predicts sales of $47 million to $49 million. Analyst forecast earnings of 19 cents a share and sales of $54.1 million.

For all of 2006, Blue Nile sees earnings of 62 cents to 72 cents a share, including 14 cents to 16 cents in options costs. Analysts predict earnings of 99 cents a share, before options. The company forecast sales of $220 million to $245 million, below Wall Street's target of $258 million. Shares were trading down $7.13 to $30.16.

Shares of

Aeroflex

soared 17% after the electronics components maker posted better-than-expected second-quarter earnings and sales. The company earned $7.8 million, or 10 cents a share, on sales of $135.2 million. Excluding items, the company earned $10.7 million, or 14 cents a share, in the December quarter. Analysts expected earnings of 12 cents a share, before items, on sales of $133 million. During the year-earlier period, the company earned $6.1 million, or 8 cents a share, on sales of $112.5 million. Excluding items, the company earned $7.4 million, or 10 cents a share, a year ago.

Looking ahead, Aeroflex sees third-quarter earnings of 11 cents a share, or 15 cents a share excluding amortization of acquired intangibles and stock-based compensation costs. The company predicts sales of about $140 million. Analysts project earnings of 14 cents a share on sales of $139 million. Shares were trading up $1.96 to $13.18.

Shares of footwear maker

Crocs

(CROX) - Get Report

soared more than 40% on their first day of trading. The company, which makes casual shoes using a resin material, had an initial public offering of 9.9 million shares priced at $21 a share. The offering price was above the already-raised estimated range of $19 to $20 a share. The shares recently traded up $9, or 43%, to $30.

NYSE

volume leaders included

Nortel Networks

, down 3 cents to $2.99;

Pfizer

(PFE) - Get Report

, up $1.06 to $26;

Time Warner

(TWX)

, down 5 cents to $18.31;

Disney

(DIS) - Get Report

, up 19 cents to $26.89;

Qwest

(Q)

, down 7 cents to $5.98;

Univision

, up $3.72 to $34.26;

Lucent Technologies

, up 4 cents to $2.70;

Exxon Mobil

(XOM) - Get Report

, up 17 cents to $60.40; and

General Electric

(GE) - Get Report

, up 3 cents to $32.34.

Nasdaq volume leaders included

Cisco Systems

(CSCO) - Get Report

, up $1.11 to $19.20;

Sirius Satellite Radio

(SIRI) - Get Report

, up 24 cents to $6;

Intel

(INTC) - Get Report

, down 3 cents to $20.64;

Oracle

(ORCL) - Get Report

, up 13 cents to $12.50;

Conexant Systems

(CNXT) - Get Report

, up 22 cents to $2.92;

Dell

(DELL) - Get Report

, up $1.30 to $30.99;

Sun Microsystems

(SUNW) - Get Report

, up 10 cents to $4.39;

Microsoft

(MSFT) - Get Report

, down 11 cents to $26.83; and

Apple Computer

(AAPL) - Get Report

, down 83 cents to $66.77.