Underfolio

Every trading day › 2023

The stock market on October 18, 2023

October 18, 2023, a Wednesday. The S&P 500 fell 1.34% to close at 4314.60. Of 4,131 US stocks that traded, 859 rose and 3,143 fell.

The S&P 500-1.34%closed at 4314.60
How big a move#3,829of 24,799 trading days since 1928
$100 in the index since$179price only, to September 24, 2026
Stocks that rose859of 4,131; 3,143 fell
Biggest companyAppleby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

DexCom, Inc. (DXCM)+4.5%
Nasdaq, Inc. (NDAQ)+4.0%
Abbott Laboratories (ABT)+3.7%

Biggest falls among the 500 largest companies

Albemarle Corporation (ALB)-9.8%
United Continental Holdings (UAL)-9.7%
Lucid Group (LCID)-9.4%

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

‹ October 17, 2023 · Every October 18 · October 19, 2023 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.