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4 August 2011: Dow drops more than 500 points on debt fears

Worries about Europe's debt crisis and a slowing US economy sent the Dow down more than 500 points, its worst day since the 2008 crisis. Washington had just ended a bruising fight over the debt ceiling, and investors were rattled. The selling turned out to be a prelude: the next evening Standard and Poor's cut America's credit rating, and stocks fell even harder the following Monday.

The lesson: Fear can feed on itself, but a frightening week is rarely a good reason to abandon long-term plans.

What it meant for investors

$1,000 in S&P 500 index fund at the start of 2012 → $5,312 today, vs $5,312 in the S&P 500.

We start the clock at the start of 2012, the first year in our price data after the event. That is 5.3 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
2012$1,280$5,312$5,312
2015$2,060$3,301$3,301
2018$2,700$2,519$2,519

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 →

4 August 2011: Dow drops more than 500 points on debt fears