Updated from 11:39 a.m. EST

Shares of

Simclar

(SIMC)

were among the

Nasdaq's

winners Friday, rising 54.6% after the company posted a fourth-quarter sales jump of 15% and solid full-year results.

The company posted fourth-quarter earnings of $495,000 on sales of $13.4 million. A year ago, the company earned $459,000 on sales of $11.5 million. On a sequential basis, earnings and sales were roughly flat with third-quarter earnings of $486,000 and sales of $13.2 million. Shares traded up $2.40 to $6.80.

Navistar International

(NAV) - Get Report

rose 0.6% after the company reaffirmed its first-quarter and 2005 earnings guidance. Despite parts shortages that are causing additional inventory, the diesel engine and truck maker said that it still expects to post first-quarter earnings of 20 cents to 25 cents a share. Analysts polled by Thomson First Call are expecting earnings of 24 cents a share on sales of $2.07 billion. For the full year, Navistar reaffirmed its guidance of $4.60 to $5.00 a share. Analysts are expecting earnings of $4.86 a share on sales of $10.51 billion. Shares traded up 20 cents to $36.60.

Shares of

Best Buy

(BBY) - Get Report

fell 6.3% after the company posted in-line fourth-quarter results but said that first-quarter earnings would be lower than expected. The consumer electronics retailer posted operating income of $522 million, or $1.55 a share, on sales of $9.23 billion. A year ago, the company earned $469 million, or $1.40 a share, on sales of $8.45 billion. Looking ahead, Best Buy expects to post first-quarter earnings of 32 cents to 37 cents a share, which excludes a stock-based compensation expense of 5 cents. Analysts had been expecting 38 cents a share. For all of fiscal 2006, the company expects to post earnings of $3.18 to $3.33 a share, excluding items, on sales of more than $30 billion. Analysts are expecting earnings of $3.31 a share on sales of $30.35 billion. Shares traded down $3.41 to $50.60.

Gentex

(GNTX) - Get Report

fell 1.2% after the company, which makes auto-dimming mirrors for the auto industry, announced a 2-for-1 stock split. Shareholders of record as of May 6 will receive one new share of stock for each share they already own. The split takes effect on May 9. Gentex also announced that it accelerated the vesting of "underwater" stock options -- options that were granted to employees at prices that are above current stock price levels. Shares, which climbed as much as 3% in early trading, traded down 37 cents to $31.53.

Shares of

Service Corporation International

(SCI) - Get Report

fell 2.4% after the cemetery and funeral company posted fourth-quarter earnings that fell just below expectations. Excluding items, the company earned $23.4 million, or 7 cents a share, on sales of $433.2 million. Analysts had been expecting earnings of 8 cents a share. A year ago, the company earned $38 million, or 12 cents a share, on sales of $599.1 million. Looking ahead, the company expects 2005 earnings of 32 cents to 37 cents a share, in line with analysts' expectations of 35 cents a share. Shares traded down 18 cents to $7.30.

NYSE

volume leaders included

American International Group

(AIG) - Get Report

, down $4.46 to $50.95;

Elan

(ELN)

, up 14 cents to $3.38;

Wal-Mart

(WMT) - Get Report

, down $1.12 to $48.99;

Lucent Technologies

(LU)

, down 4 cents to $2.71;

Pfizer

(PFE) - Get Report

, down 12 cents to $26.15; and

General Electric

(GE) - Get Report

, down 59 cents to $35.47.

Nasdaq volume leaders included

Intel

(INTC) - Get Report

, down 22 cents to $23.01;

Microsoft

(MSFT) - Get Report

, down 5 cents to $24.12;

Cisco Systems

(CSCO) - Get Report

, down 19 cents to $17.70;

Oracle

(ORCL) - Get Report

, up 5 cents to $12.53;

Sirius Satellite Radio

(SIRI) - Get Report

, down 6 cents to $5.56; and

Red Hat

(RHAT)

, up $1.25 to $12.16.