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StocksMedium•27 February 2026•

1 min read

US Stocks Slump to Worst Monthly Performance in 11 Months on Inflation and AI Jitters

Key Facts

1The S&P 500 fell 0.43%, ending February down 1.43%, its worst performance in 11 months.

2The Nasdaq Composite slid 0.92% and the Dow Jones Industrial Average dropped 1.05%.

Major US stock indices closed lower on February 27, marking a significant downturn as the S&P 500 recorded its worst monthly performance in 11 months. The index fell 0.43% during the session, ending February with a total decline of 1.43%. Other benchmarks followed suit, with the Nasdaq Composite sliding 0.92% and the Dow Jones Industrial Average dropping 1.05%. Market sentiment was heavily weighed down by fresh inflation data and growing anxiety regarding the valuations of Artificial Intelligence (AI) investments. These macroeconomic and sector-specific pressures particularly punished technology and growth stocks. The broad decline across all major indices indicates a notable shift toward risk-off behavior among global investors.