Underfolio

Every trading day › 1973

The stock market on September 27, 1973

September 27, 1973, a Thursday. The S&P 500 rose 0.23% to close at 109.08. Of 4,979 US stocks that traded, 1,724 rose and 1,284 fell.

The S&P 500+0.23%closed at 109.08
How big a move#18,250of 24,799 trading days since 1928
$100 in the index since$7,063price only, to September 24, 2026
Stocks that rose1,724of 4,979; 1,284 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Champion International (CHA)+6.2%
Ceridian Corp (CEN)+6.2%

Biggest falls among the 500 largest companies

GenCorp (GY)-10.0%
American Airlines Group (AMR)-5.8%
Pittston Brinks (PZB)-5.1%

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

‹ September 26, 1973 · Every September 27 · September 28, 1973 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.