Underfolio

Every trading day › 2026

The stock market on September 9, 2026

September 9, 2026, a Wednesday. The S&P 500 fell 0.48% to close at 7636.36. Of 3,329 US stocks that traded, 712 rose and 2,504 fell.

The S&P 500-0.48%closed at 7636.36
How big a move#12,728of 24,799 trading days since 1928
$100 in the index since$101price only, to September 24, 2026
Stocks that rose712of 3,329; 2,504 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Cloudflare Inc (NET)+10.5%
Datadog Inc (DDOG)+7.1%
Meta Platforms (META)+6.6%

Biggest falls among the 500 largest companies

Caseys General Stores Inc (CASY)-14.2%
Ubiquiti Inc (UI)-10.3%
Vertiv Holdings, LLC (VRT)-9.6%

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

‹ September 8, 2026 · Every September 9 · September 10, 2026 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.