Updated from 5:03 p.m. EDT
Volume remained numbingly low for the top movers on Instinet as a lack of corporate news stunted after-hours activity.
The 20 most-active stocks produced a net gain of 0.23% as less than 1 million shares changed hands during the first 30 minutes after the close of the regular session.
, the top mover on Instinet, and
, the second leading volume mover on Island ECN, both remained unchanged on light volume.
was the leader on Island, up 1.8% to $7.50. The company claimed the number four spot on Instinet, gaining 1.8%. The chip technology company rose nearly 30% during the regular session following news that
new Pentium 4 microprocessor was now available. Intel's new microprocessors use Rambus-designed memory. Shares of
were unchanged in the extended session on Instinet and up 0.48% on Island.
Other tech names were circulating in the later session.
, which gained 3.9% during the regular session, was up 0.4% to $7.80 and ranked number two in volume.
tracking stock were all unchanged.
Island ECN offers trading, mainly in Nasdaq-listed stocks, from 7 a.m. to 8 p.m. EST.
explains how the rules change when the sun goes down in Investing Basics: Night Owl, a section devoted to after-hours trading.