What Past Stock Market Declines Can Teach Us | American Funds

Market Fluctuations

What Past Market Declines Can Teach Us

Stock market declines are the last thing most investors want to experience, but they are an inevitable part of investing. Perhaps a little historical background can help you put stock market declines in perspective.

Types of Stock Market Declines

A look back at stock market history since 1949 shows that declines have varied widely in intensity, length and frequency. In the midst of a decline, it’s been nearly impossible to tell the difference between a slight dip and a more prolonged correction.

The table below shows that declines in the Standard & Poor's 500 Composite Index  have been somewhat regular events.

A History of Declines (1949–December 2018)

Type of
Decline
Average
Frequency1
Average
Length2
Last
Occurrence3

–5% or more

About 3 times a year

44 days

December 2018

–10% or more

About once a year

114 days

December 2018

–15% or more

About once every 4 years

270 days

December 2018

–20% or more

About once every 7 years

431 days

December 2018


Source: RIMES, Standard & Poor's.

1Assumes 50% recovery rate of lost value.

2Measures market high to market low.

3The average frequency and average length rows exclude the most recent decline in December 2018 because the 50% recovery of lost value occurred after 12/31/18.

Lessons Learned From Market Declines

Living with a market decline isn’t easy, but if you understand these 3 key lessons, you’ll be a more intelligent investor.

  1. No one can predict consistently when market declines will happen.

    It’s easy to look back today and say with hindsight that the stock market was overvalued at a particular time and due for a decline. But no one has been able to accurately predict market declines on a consistent basis.

    In January 1973, a New York Times poll of 8 market authorities predicted that the market would “move somewhat higher” in the future. The Dow industrials proceeded to decline 45% over the next 23 months. Then, although almost no one predicted it, the Dow rose 38% in 1975.

  2. No one can predict how long a decline will last.

    Since 1982, with few exceptions, market declines have been relatively brief. Earlier market declines have lasted longer.

    After the 1929 crash, it took investors 16 years to restore their investments if they invested at the market high. In 2000, it took about 5 years. But after the 1987 crash, it took about 23 months to get back. In 1990, it took about 8 months. (In all cases, dividends were assumed to be reinvested.)

  3. No one can consistently predict the right time to get in or out of the market.

    Successful market timing during a decline is extremely difficult because it requires a pair of near-perfect actions: getting out and then getting back in at the right time.

    A common mistake investors make is to lose patience and sell at or near the bottom of a downturn. But even if you have decent timing and get out early in a decline, you still have to figure out when to get back in.

    A bear market is not usually characterized by a straight-line decline in stock prices. Instead, the market’s downward trend is likely to be jagged — showing bursts of stock price increases, known as “sucker’s rallies,” and then declines.

Be sure to talk to your financial professional before making any changes to your financial plan.


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This content, developed by Capital Group, home of American Funds, should not be used as a primary basis for investment decisions and is not intended to serve as impartial investment or fiduciary advice.

Past results are not predictive of results in future periods.

Terms and Definitions
S&P 500 Index is a market capitalization-weighted index based on the results of approximately 500 widely held common stocks. This index is unmanaged, and its results include reinvested dividends and/or distributions but do not reflect the effect of sales charges, commissions, account fees, expenses or U.S. federal income taxes.