Underfolio

Every trading day › 2026

The stock market on August 12, 2026

August 12, 2026, a Wednesday. The S&P 500 rose 0.26% to close at 7748.50. Of 3,335 US stocks that traded, 1,735 rose and 1,485 fell.

The S&P 500+0.26%closed at 7748.50
How big a move#17,386of 24,799 trading days since 1928
$100 in the index since$99.43price only, to September 24, 2026
Stocks that rose1,735of 3,335; 1,485 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Supermicro (SMCI)+19.0%
Lumentum Holdings Inc (LITE)+13.6%
Bloom Energy Corp (BE)+12.3%

Biggest falls among the 500 largest companies

CoreSite Realty Corporation (COR)-5.9%
First Solar (FSLR)-5.9%
Mercadolibre Inc (MELI)-5.8%

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

‹ August 11, 2026 · Every August 12 · August 13, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.