S&P 500 · October 10, 2025
Two trillion dollars, one post
-2.71%
single-day change vs previous close
What happened that day?
- On 10 October 2025 the S&P 500 fell 2.71%
- That afternoon the US president posted on social media that tariffs on Chinese goods would rise sharply
- The figure was an additional one hundred percent, on top of what was already being charged
- Combined with existing tariffs that amounts to shutting trade down, and the market read it that way
- About two trillion dollars of US market value disappeared in a session — the worst day since April that year
- More than four hundred of the five hundred S&P names closed lower
- Peak to trough it was only 3.18%. The shock was large but it did not last
Sources
Every figure on this page is recomputed from the original daily closing prices and checked against them at build time. The account of what happened is written from the sources listed above.