The stock market on December 20, 1984
December 20, 1984, a Thursday. The S&P 500 fell 0.47% to close at 166.38. Of 5,767 US stocks that traded, 1,408 rose and 1,822 fell.
The S&P 500-0.47%closed at 166.38
How big a move#13,038of 24,799 trading days since 1928
$100 in the index since$4,630price only, to September 24, 2026
Stocks that rose1,408of 5,767; 1,822 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for5stocks
Biggest rises among the 500 largest companies
| ConocoPhillips (P) | +5.8% |
| Deluxe Corporation (DLX) | +5.5% |
| Progress Energy (CPL) | +4.2% |
Biggest falls among the 500 largest companies
| National Semiconductor (NSM) | -9.8% |
| FedEx (FDX) | -7.0% |
| Wang Labs Inc (WANG) | -5.5% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ December 19, 1984 · Every December 20 · December 21, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.