Underfolio

Every trading day › 2026

The stock market on August 21, 2026

August 21, 2026, a Friday. The S&P 500 rose 0.43% to close at 7674.37. Of 3,334 US stocks that traded, 2,050 rose and 1,146 fell.

The S&P 500+0.43%closed at 7674.37
How big a move#13,667of 24,799 trading days since 1928
$100 in the index since$100price only, to September 24, 2026
Stocks that rose2,050of 3,334; 1,146 fell
Biggest companyNvidiaby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Robinhood (HOOD)+13.7%
Moderna (MRNA)+8.9%
Coinbase Global (COIN)+8.2%

Biggest falls among the 500 largest companies

Marvell Technology Group Ltd (MRVL)-5.6%
Sempra Energy (SRE)-5.1%
Edison International (EIX)-4.1%

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

‹ August 20, 2026 · Every August 21 · August 24, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.