Updated from 4:59 p.m. EDT

Chemicals company

Hercules

(HPC)

was one of the largest percentagegainers on Instinet, jumping 5.7% to $7.66. Thecompany lost 3.6% in regular New York Stock Exchange tradingon Thursday.

Euronet Worldwide

(EEFT) - Get Report

continued to slide, falling 2.8% to $9.96, afterslipping 3.8% in the regular session. The provider ofsecure electronic financial transaction softwaresaid Thursday that it has implemented the EuronetIntegrated Credit Card System and the EuronetIntegrated Debit Card System at Seylan Bank, SriLanka.

Orion Power

(ORN) - Get Report

was one ofthe biggest gainers in the early part of the extended session,but the stock fell off the chart as the session grew older. Thecompany gained 31.2% in regular trading Thursday.Earlier in the day,

Reliant Resources

(RRI)

said it would acquire Orion for about$2.9 billion in cash. Reliant will pay $26.80 for eachshare of Orion. The price represents a premium ofabout 40% to Orion's closing price Wednesday.

On a day when President Bush tried to rally thecountry around the airline sector,

ContinentalAirlines

(CAL) - Get Report

continued to trade inheavy volume after hours. Investors pushed the stock down11.9% in regular trading. The shares were holdingsteady at $13 a share in the late session, and the carrier was the No. 2 volume mover on Instinet.

For the fourth day in a row this week, volumeremained strong as 4.6 million shares changed hands inthe first 25 minutes of trading, with technologydominating the late session. Nearly 70% of thecompanies on the Instinet top 20 volume movers chartwere posting gains or were unchanged, but the majorityof the volume leaders on Island were losing ground.

Intel

(INTC) - Get Report

fell 0.6% to $20.42,while

Applied Micro Circuits

(AMCC)

slipped 0.2% to $6.49.

Cisco

(CSCO) - Get Report

and

Oracle

(ORCL) - Get Report

were both off less than1%.

BEA Systems

(BEAS)

was up0.8% to $9.35, and

JDS Uniphase

(JDSU)

was unchanged at $6.03.

Island ECN offers trading, mainly inNasdaq-listedstocks,from 7 a.m. to 8 p.m. EST.

Confused?

TheStreet.com

explains how therules changewhenthe sun goes down in Investing Basics: NightOwl, a section devoted to after-hourstrading.