Underfolio

Every trading day › 1980

The stock market on August 8, 1980

August 8, 1980, a Friday. The S&P 500 rose 0.25% to close at 123.61. Of 4,572 US stocks that traded, 1,748 rose and 1,162 fell.

The S&P 500+0.25%closed at 123.61
How big a move#17,680of 24,799 trading days since 1928
$100 in the index since$6,233price only, to September 24, 2026
Stocks that rose1,748of 4,572; 1,162 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Hudson's Bay Oil & Gas Co (HBO)+7.6%
Mesa Inc (MXP.)+7.1%
Pioneer Corp-Texas (PNA)+5.9%

Biggest falls among the 500 largest companies

Snap-On (SNA)-4.3%
Polaroid (PRDCQ)-4.3%
Northwest Industries (NWT)-4.0%

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

‹ August 7, 1980 · Every August 8 · August 11, 1980 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.