Underfolio

Every trading day › 2026

The stock market on August 20, 2026

August 20, 2026, a Thursday. The S&P 500 fell 0.87% to close at 7641.16. Of 3,335 US stocks that traded, 1,037 rose and 2,179 fell.

The S&P 500-0.87%closed at 7641.16
How big a move#7,264of 24,799 trading days since 1928
$100 in the index since$101price only, to September 24, 2026
Stocks that rose1,037of 3,335; 2,179 fell
Biggest companyNvidiaby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Nordson Corporation (NDSN)+8.0%
Microstrategy Inc (MSTR)+7.8%
Coinbase Global (COIN)+7.6%

Biggest falls among the 500 largest companies

Moderna (MRNA)-23.5%
Walmart (WMT)-9.2%
Intuitive Surgical (ISRG)-5.8%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ August 19, 2026 · Every August 20 · August 21, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.