Underfolio

Every trading day › 1980

The stock market on October 23, 1980

October 23, 1980, a Thursday. The S&P 500 fell 1.81% to close at 129.53. Of 4,628 US stocks that traded, 840 rose and 2,299 fell.

The S&P 500-1.81%closed at 129.53
How big a move#2,076of 24,799 trading days since 1928
$100 in the index since$5,948price only, to September 24, 2026
Stocks that rose840of 4,628; 2,299 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Richardson-Vicks Inc (RVI)+12.0%
Texas Gas Transmission LLC+5.3%
Ryder System (R)+4.3%

Biggest falls among the 500 largest companies

Pacific Bell-12.1%
M/a-com (MAI)-7.3%
Fina Inc -cl A (FI)-6.0%

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

‹ October 22, 1980 · Every October 23 · October 24, 1980 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.