The stock market on September 30, 1999
September 30, 1999, a Thursday. The S&P 500 rose 1.13% to close at 1282.71. Of 6,762 US stocks that traded, 3,265 rose and 2,586 fell.
The S&P 500+1.13%closed at 1282.71
How big a move#4,995of 24,799 trading days since 1928
$100 in the index since$601price only, to September 24, 2026
Stocks that rose3,265of 6,762; 2,586 fell
Biggest companyMicrosoftby market value that day
Last day of trading for12stocks
Biggest rises among the 500 largest companies
| Alteon Websystems Inc (ATON.) | +21.9% |
| Careinsite Inc. (CARI) | +20.9% |
| AutoZone (AZO) | +10.9% |
Biggest falls among the 500 largest companies
| UnitedHealth Group (UNH) | -19.5% |
| Aetna (AET) | -17.5% |
| Cigna (CI) | -10.6% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 29, 1999 · Every September 30 · October 1, 1999 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.