The Nasdaq 100 Index plunged 3% at 12:22 p.m., putting the tech-heavy gauge on track for its biggest drop since October. Find out more.

The Nasdaq lost nearly a month's worth of gains Friday.

The Nasdaq 100 Index plunged 3% at 12:22 p.m., putting the tech-heavy gauge on track for its biggest drop since October. Find out more.