Bear Markets Arrive About Every Six Years. Then What?

U.S. stocks have fallen into a bear market roughly once every six years on average, a frequency that argues for holding a long-term perspective rather than trying to sidestep the next decline, according to a Nasdaq Markets analysis published September 13, 2026.

The arithmetic of stock market declines is not comforting on first reading. Over the long sweep of U.S. market history, a bear market — conventionally defined as a decline of 20% or more from a prior high — has arrived roughly once every six years on average. That is not a forecast. It is a base rate, and it applies to every investor holding equities, regardless of how calm the tape looks in any given week.

Right now the tape looks calm. The SPDR S&P 500 ETF Trust (NYSEARCA: SPY), the most widely held proxy for the U.S. large-cap benchmark, finished at $764.29 in its most recent session on Friday, September 11, 2026, up 0.85% from the prior close of $757.83. The Invesco QQQ Trust (NASDAQ: QQQ), which tracks the Nasdaq 100, closed at $714.88, higher by 0.87%. The SPDR Dow Jones Industrial Average ETF Trust (NYSEARCA: DIA) closed at $525.79, up 0.97%. Three broad benchmarks, three green sessions, no visible distress.

That is precisely when the six-year cadence is worth restating.

Why an Average Interval Is Not a Schedule

An average of one bear market every six years does not mean one arrives punctually on the six-year mark. Averages compress clusters and droughts into a single number. Some decades deliver two or three drawdowns in quick succession; others go a long stretch without one, which lulls investors into treating the calm as the natural state of things.

What the base rate does establish is that anyone with a multi-decade holding period should expect to sit through several bear markets. An investor with 30 years ahead of them is not planning around the possibility of a 20% decline. They are planning around the near-certainty of experiencing more than one. The planning question is therefore not "will it happen" but "what do I do when it does."

That reframing is the substance of the argument laid out by Nasdaq Markets, which holds that maintaining a long-term perspective is critical precisely because the frequency of declines is known in advance.

The Case That Declines Help Rather Than Hurt

The claim that a coming bear market is "good news" sounds like a rhetorical trick. It is not, provided two conditions hold: the investor is still accumulating, and the investor does not sell.

For someone contributing regularly — a 401(k) deferral each pay period, an automatic transfer into an index fund each month — a bear market is a period in which the same dollar buys more shares. Those shares are still owned when the market recovers. The mechanism is unglamorous and requires nothing more than continuing to do what was already being done. The investor who stops contributing during the decline, or worse liquidates, converts a temporary paper loss into a permanent realized one and forfeits the cheaper shares.

For someone drawing down — a retiree selling assets to fund living expenses — the calculus is genuinely different. Selling into a decline to cover spending locks in losses at the worst possible moment, a risk that goes by the name sequence-of-returns risk. That is why the standard advice for people near or in retirement is to hold a cushion of cash or short-duration bonds sufficient to cover spending needs without touching equities during a drawdown. The six-year base rate is exactly the kind of input that cushion should be sized against.

What the Base Rate Does Not Tell You

For someone drawing down — a retiree selling assets to fund living expenses — the calculus is genuinely different.

Frequency is one variable. Depth and duration are two more, and an average interval says nothing about either. Some bear markets are shallow and brief; others are severe and grind on. Nor does a historical average carry any information about timing. There is no signal in it. It cannot tell you whether the next decline begins next quarter or in four years, and anyone using it as a market-timing tool is misreading what an average is.

This is the practical limit of the argument. History supports the claim that U.S. equity markets have recovered from their declines and gone on to make new highs — that is the foundation on which the long-term case rests. It does not promise the recovery will be quick, and it does not promise it will be comfortable to sit through. Past frequency is a description of what has happened, not a guarantee about what will.

Positioning Before the Decline, Not During It

The decisions that determine how an investor fares in a bear market are almost all made before it starts. Once prices are falling, options narrow and emotions crowd out arithmetic. A short list of things that are easier to fix now than later:

Asset allocation that matches the actual time horizon. Money needed within a few years should not be in equities. Money not needed for decades probably should be.
Automated contributions. Removing the decision from the moment removes the temptation to skip it when headlines are bad.
A written cash reserve target. For anyone drawing income from a portfolio, a defined number of months of spending held outside equities is the single most effective defense against forced selling.
Rebalancing rules set in advance. Deciding ahead of time at what drift threshold you will sell winners and buy losers converts a stressful judgment call into an administrative task.
Diversification across the whole portfolio, not just within stocks. Concentration risk is invisible in a rally and painfully obvious in a drawdown.

What to Watch From Here

Nothing in the most recent closing data suggests stress. SPY's session range of $763.60 to $766.38, QQQ's range of $713.63 to $717.63 and DIA's range of $524.29 to $527.36 describe an orderly, narrow day in all three benchmarks, with the Dow tracker posting the strongest gain of the three at 0.97%.

Calm sessions are not evidence that a decline is far off, and they are not evidence that one is near. They are simply the condition under which most investors make their allocation decisions, which is an argument for making those decisions deliberately rather than reactively. The investors who come through the next bear market intact will largely be the ones who wrote down their plan while the market was quiet and then declined to renegotiate it once it was not.

Key facts

Bear market frequency: Once every six years on average in U.S. stocks
S&P 500 tracker (NYSEARCA: SPY): $764.29, +0.85%, close of Fri Sep 11, 2026, 20:00 GMT
Nasdaq 100 tracker (NASDAQ: QQQ): $714.88, +0.87% on the same session
Dow 30 tracker (NYSEARCA: DIA): $525.79, +0.97%, strongest of the three benchmarks

Frequently asked questions

What counts as a bear market?

A bear market is conventionally defined as a decline of 20% or more from a prior peak in a major stock index. It is distinguished from a correction, which is a smaller decline. Historically, U.S. stocks have entered a bear market roughly once every six years on average, though that figure is a long-run average rather than a fixed schedule.

Does a six-year average mean the next bear market is predictable?

No. An average interval describes the long-run frequency of past declines and contains no timing signal. Bear markets have clustered closely together in some periods and been absent for long stretches in others. The average is useful for setting expectations and sizing cash reserves, but it cannot tell an investor when the next decline will begin.

How can a market decline be good news for an investor?

For someone still contributing to a portfolio, a decline means each contribution buys more shares at lower prices, and those shares are still owned when the market recovers. The benefit depends on two conditions: continuing to contribute through the downturn, and not selling. An investor who liquidates converts a temporary paper loss into a realized one.

Why is a bear market riskier for retirees?

Retirees drawing income must sell assets to fund spending, and selling into a falling market locks in losses at the worst time. This is known as sequence-of-returns risk. The standard defense is holding a cash or short-duration bond reserve large enough to cover living expenses for a defined period so equities need not be sold during a drawdown.

Where did the major U.S. benchmarks last close?

As of the last trade on Friday, September 11, 2026 at 20:00 GMT, the SPDR S&P 500 ETF Trust closed at $764.29, up 0.85%. The Invesco QQQ Trust, tracking the Nasdaq 100, closed at $714.88, up 0.87%. The SPDR Dow Jones Industrial Average ETF Trust closed at $525.79, up 0.97%.

What should an investor do before the next bear market?

Set asset allocation to match the actual time horizon, automate contributions so the decision is removed from the moment, define a cash reserve target in months of spending, write rebalancing rules in advance, and check diversification across the whole portfolio. These are far easier to establish during calm markets than during a decline.

Sources

A Bear Market Is Coming at Some Point. History Says That's Actually Good News for Investors. — Nasdaq Markets

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