US equity markets suffered a sharp decline during Thursday’s trading session, with the Nasdaq Composite tumbling 5.5% as growth stocks faced a steep retreat. The S&P 500 lost 4.4% of its value on Nov 5, marking the benchmark’s steepest single-day drop since the tariff-induced volatility seen in April 2025.
The selloff was concentrated in the technology sector, which was the only one of 11 industry groups to underperform the S&P 500 during the session. The losses represent a 4-sigma event—a volatility spike that occurs on average once every 19 months—and rank as the 37th most severe daily decline for the S&P 500.
