Underfolio

Every trading day › 2026

The stock market on August 19, 2026

August 19, 2026, a Wednesday. The S&P 500 rose 0.21% to close at 7707.98. Of 3,335 US stocks that traded, 1,799 rose and 1,425 fell.

The S&P 500+0.21%closed at 7707.98
How big a move#18,742of 24,799 trading days since 1928
$100 in the index since$99.95price only, to September 24, 2026
Stocks that rose1,799of 3,335; 1,425 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Moderna (MRNA)+177.0%
Estée Lauder Companies (The) (EL)+16.3%
Hecla Mining Co (HL)+14.4%

Biggest falls among the 500 largest companies

Sitime Corp (SITM)-9.0%
M/Acom Technology Solutions (MTSI)-7.8%
Steel Dynamics (STLD)-7.5%

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

‹ August 18, 2026 · Every August 19 · August 20, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.