Nasdaq Composite Enters Correction After Deepest One-Day Drop in 19 Months

The Nasdaq Composite closed sharply lower Thursday, November 5, 2026, its deepest one-day drop in 19 months and a slide into correction, meaning down at least 10% from a recent peak. Chipmakers sank on fears of tougher AI regulation. Broad index funds hold those same chip names, at smaller weights.