Shares of

Steel Technologies

(STTX)

were among the

Nasdaq's

losers Wednesday, tumbling 9% after the company gave a first-quarter earnings estimate that fell short of Wall Street's expectation.

The processor of flat-rolled steel said it expects to report earnings of 24 cents a share and revenue of $210 million for the first quarter ended Dec. 31. Analysts polled by Thomson First Call projected earnings of 35 cents a share and revenue of $221 million. The company estimates that its shipments totaled 270,000 tons, in line with its earlier projections. Steel Technologies shares were trading down $2.72 to $26.11.

Greenbrier

(GBX) - Get Report

shares gained 8% after the company's first-quarter earnings came in well above expectations. Greenbrier, which provides transportation equipment and services to the railroad industry, posted earnings of $8 million, or 51 cents a share, for the quarter ended Nov. 30. Analysts, on average, predicted earnings of 37 cents a share. The company's revenue of $186.4 million missed Wall Street's expectation of $222 million, but overall results were boosted by improved profit margins. Last year, Greenbrier reported first-quarter earnings of $5.4 million, or 35 cents a share, on revenue of $218 million.

For the full fiscal year, Greenbrier expects earnings of $2.30 to $2.45 a share. Analysts have a mean estimate for earnings of $2.30 a share. Greenbrier shares were up $2.19 to $30.45.

Shares of

Intermagnetics

( IMGC) surged 19% after the maker of magnetic resonance imaging products posted better-than-expected second-quarter earnings and announced a Department of Defense contract. For the second quarter ended Nov. 27, Intermagnetics' earnings rose to $6.8 million, or 24 cents a share, from $4.1 million, or 15 cents a share, a year earlier. Excluding items, the company earned 30 cents a share, topping analysts' forecast of 28 cents. Revenue grew to $78.1 million from $66.2 million. The company reiterated its forecast for full-year sales growth of more than 15%, with earnings up more than 20%.

Separately, Intermagnetics said its energy technology unit, SuperPower, received a $10.7 million contract from the Defense Department related to high-temperature superconducting wire development. Shares of Intermagnetics were up $5.77 to $36.57.

Boyd Gaming

(BYD) - Get Report

shares fell 3% after the company announced a plan to develop a $4 billion casino and resort on the Las Vegas strip. The project, scheduled to be completed in 2010, includes four hotels, retail space and an exhibition center. The new development will stand in the place of the Stardust Hotel and Casino. Boyd shares were off $1.61 to $46.79.

Estee Lauder

(EL) - Get Report

shares rose 5% after Standard & Poor's said it would add the cosmetics maker to the

S&P 500

. Estee Lauder replaces

Mercury Interactive

( MERQE), which is being delisted from Nasdaq after filing violations. The move is effective after the close of trading Wednesday. Estee Lauder shares recently traded up $1.71 to $35.05.

The most actively traded stocks on the

NYSE

Wednesday were

Lucent

( LU), up 4 cents to $2.73;

Pfizer

(PFE) - Get Report

, up 64 cents to $24.42;

Verizon

(VZ) - Get Report

, up 64 cents to $31.02;

Maxtor

( MXO), up 27 cents to $7.22;

Telesp Celular

(TCP) - Get Report

, up 42 cents to $4.52;

Ford

(F) - Get Report

, up 10 cents to $7.93;

General Electric

(GE) - Get Report

, down 19 cents to $35.18;

EMC

(EMC)

, up 27 cents to $13.95;

Citigroup

(C) - Get Report

, down 44 cents to $48.85; and

ExxonMobil

(XOM) - Get Report

, up 23 cents to $58.70.

Heavy volume traders on the Nasdaq included

Cisco

(CSCO) - Get Report

, up 44 cents to $17.89;

Sirius Satellite Radio

(SIRI) - Get Report

, down 13 cents to $6.39;

Oracle

(ORCL) - Get Report

, up 9 cents to $12.69;

Microsoft

(MSFT) - Get Report

, up 13 cents to $26.97;

Intel

(INTC) - Get Report

, up 21 cents to $25.78;

Sun Microsystems

(SUNW) - Get Report

, up 9 cents to $4.41;

Apple

(AAPL) - Get Report

, up 31 cents to $75.06;

JDS Uniphase

(JDSU)

, up 6 cents to $2.48;

Ciena

(CIEN) - Get Report

, up 10 cents to $3.15; and

Yahoo!

(YHOO)

, up 28 cents to $41.19.