Underfolio

Every trading day › 1988

The stock market on October 11, 1988

October 11, 1988, a Tuesday. The S&P 500 fell 0.11% to close at 277.93. Of 6,140 US stocks that traded, 1,529 rose and 2,058 fell.

The S&P 500-0.11%closed at 277.93
How big a move#21,519of 24,799 trading days since 1928
$100 in the index since$2,772price only, to September 24, 2026
Stocks that rose1,529of 6,140; 2,058 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

National Semiconductor (NSM)+9.5%
Maytag (MYG)+6.3%
Louisiana Land & Exploration (LLX.)+5.6%

Biggest falls among the 500 largest companies

Kroger (KR)-4.6%
Pinnacle West Capital Corporation (PNW)-3.9%
American Express (AXP)-3.3%

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

‹ October 10, 1988 · Every October 11 · October 12, 1988 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.