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24 October 1929: Black Thursday

Panic selling hit the New York Stock Exchange, with a record of nearly 13 million shares changing hands as prices collapsed in the morning. Leading bankers pooled money to buy stocks and briefly steadied the market, and the day ended with smaller losses than feared. The relief was short-lived. The following week brought even worse days, and the Dow would eventually lose nearly 90 percent from its peak.

The lesson: A rescue that calms one day of panic does not fix a bubble built over years.

What it meant for investors

$1,000 in S&P 500 index fund at the start of 1990 → $19,429 today, vs $19,429 in the S&P 500.

We start the clock at the start of 1990, the first year in our price data after the event. That is 19.4 times the money, but $0 less than a plain index fund made over the same years.

What S&P 500 index fund teaches: Owning the whole market removes the risk of picking the wrong company but not the risk of a lost decade, so time horizon matters as much as diversification.

Bought inPrice thenWorth todayS&P 500 would be
1990$350$19,429$19,429
1995$460$14,783$14,783
2000$1,470$4,626$4,626

green = beat the S&P 500 · red = lost money

What if you bought S&P 500 index fund? Every starting year and the full story →

24 October 1929: Black Thursday