Underfolio

Every trading day › 1988

The stock market on October 20, 1988

October 20, 1988, a Thursday. The S&P 500 rose 2.13% to close at 282.88. Of 6,140 US stocks that traded, 2,184 rose and 1,436 fell.

The S&P 500+2.13%closed at 282.88
How big a move#1,467of 24,799 trading days since 1928
$100 in the index since$2,723price only, to September 24, 2026
Stocks that rose2,184of 6,140; 1,436 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Nabisco Group Holdings (NGH)+38.3%
Navistar International (NAV)+9.8%
Fortune Brands (FO)+8.8%

Biggest falls among the 500 largest companies

CSX Corporation (CSX)-4.3%
West Point Pepperell (WPM)-2.7%
Flagstar Corp-2.3%

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

‹ October 19, 1988 · Every October 20 · October 21, 1988 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.