Traders were fairly active in the extended session Thursday, but few stocks were straying far in either direction from their closing levels.

Ultramar Diamond Shamrock

(UDS)

, which is merging with

Valero Energy

(VLO) - Get Report

, was the most active stock on the Instinet platform following the 4 p.m. EST end of regular trading. Ultramar was flat at $49.57.

eFunds

(EFDS)

, a provider of electronic payment and other services, was the No. 2 volume mover, but the issue was unchanged at $15.60.

Overall, volume was fairly convincing, especially considering the slow sessions that normally occur during the holidays. In the first half-hour of extra trading, about 3.2 million shares changed hands among the top 20 volume movers on Instinet.

Oracle

(ORCL) - Get Report

was off 0.1% at $13.97, and

ADC Telecom

(ADCT) - Get Report

was flat at $4.63.

Cisco

(CSCO) - Get Report

was slipping 0.2% to $18.45, and

BEA Systems

(BEAS)

was down 2% to $15.33.

Microsoft

(MSFT) - Get Report

was unchanged at $67.86, and

Sun Micro

(SUNW) - Get Report

was inching down 0.2% to $12.79.

Big winners and losers were hard to find.

JNI

(JNIC)

was up 2.2% to $8.81, and

TiVo

(TIVO) - Get Report

was higher by 2.1% to $6.28, but volume was extremely light on both issues.

Excelon

(EXLN)

was off 9 cents at 91 cents.