Underfolio

Every trading day › 2023

The stock market on September 18, 2023

September 18, 2023, a Monday. The S&P 500 rose 0.07% to close at 4453.53. Of 4,156 US stocks that traded, 1,453 rose and 2,549 fell.

The S&P 500+0.07%closed at 4453.53
How big a move#22,689of 24,799 trading days since 1928
$100 in the index since$173price only, to September 24, 2026
Stocks that rose1,453of 4,156; 2,549 fell
Biggest companyAppleby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Tyler Technologies, Inc. (TYL)+3.9%
Rollins (ROL)+3.2%
Applovin (APP)+2.8%

Biggest falls among the 500 largest companies

Moderna, Inc. (MRNA)-9.1%
Unity Software (U)-7.9%
Incyte Corporation (INCY)-4.9%

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

‹ September 15, 2023 · Every September 18 · September 19, 2023 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.