Underfolio

Every trading day › 2025

The stock market on September 17, 2025

September 17, 2025, a Wednesday. The S&P 500 fell 0.10% to close at 6600.35. Of 3,532 US stocks that traded, 1,597 rose and 1,836 fell.

The S&P 500-0.10%closed at 6600.35
How big a move#21,931of 24,799 trading days since 1928
$100 in the index since$117price only, to September 24, 2026
Stocks that rose1,597of 3,532; 1,836 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Bloom Energy Corp (BE)+8.7%
Hologic (HOLX)+7.7%
Workday, Inc. (WDAY)+7.2%

Biggest falls among the 500 largest companies

Builders FirstSource (BLDR)-5.6%
Uber (UBER)-5.0%
Bwx Technologies Inc (BWXT)-4.7%

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

‹ September 16, 2025 · Every September 17 · September 18, 2025 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.