After-hours traders were keeping most stocks close to the flatline in what amounted to a fairly quiet session following big losses during the regular day.

WorldCom ( WCOM) was the most active stock on Instinet after the close Monday, but the voice and data service provider's shares were flat at $1.84. Peregrine Software ( PRGN), which was hammered in regular trading, inched up 1.1% to 90 cents.

Volume was on the light side. In the first hour of the extra session, around 1.9 million shares had changed hands among the top-20 most active stocks on the Instinet platform.

The Nasdaq 100 Unit Trust ( QQQ - Get Report) was slipping 0.1% to $28.94, and Cisco ( CSCO - Get Report) was tacking on 0.2% to $12.92 the day before its quarterly earnings report.

Elsewhere, Intel ( INTC - Get Report) was gaining 0.8%, and IBM ( IBM) was adding 1.1%. In regular trading, Big Blue gave up 7%. ( AMZN) was up 0.1%, Sun Micro ( SUNW) was gaining 0.7%, and Microsoft ( MSFT) was down 0.3%.

Apple ( AAPL) and Hewlett-Packard ( HPQ) were flat with their 4 p.m. EDT closing levels.

Serena Software ( SRNA) was one of the biggest losers, falling 18% to $9.35 after the company lowered its guidance for the coming months. Mobile Mini ( MINI) was dropping almost 10% to $24.90 as the company met expectations for the latest quarter but warned of a shortfall for the full year.

Providian Financial ( PVN) was among the top winners, adding 5.5% to $6.70. Following the close, the credit card company said its first-quarter earnings plunged from the same period a year ago, but the result matched estimates.