Prediction: The S&P 500 Will Pull Back This August. Here's What History Says About the Damage.

I think the S&P 500 (SNPINDEX: ^GSPC) will pull back a bit this August. However, history suggests the damage is usually uncomfortable but not catastrophic. More often, it's a normal pause in a longer‑term uptrend, rather than the start of a lasting bear market.

For long‑term investors, that argues for preparing mentally and tactically for volatility, rather than trying to sidestep it entirely.

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August really is a soft spot

Seasonality isn't destiny, but the numbers do show that August has a habit of underwhelming. One long‑term study of monthly returns since 1950 found that the S&P 500's average August gain rounds to basically zero, with August and September standing out as the weakest pair on the calendar. Looking at the last three decades, another analysis found that the index has declined by an average of about 0.5% in August and has only done worse in September, with an average drop of about 0.7%. Put simply, if you had to pick one two‑month stretch when the market tends to be grumpy, August–September would be near the top of the list.

This year, that seasonal soft spot is arriving with the S&P 500 already near record highs after a strong start to 2026. When you combine stretched sentiment, a long run higher, and a historically weak window, it's not surprising to see strategists warn about a pullback. It doesn't mean "crash," but it does mean the odds of a choppy month are higher than usual.

How bad do August pullbacks get?

Here's where the historical perspective really matters. Bank of America analysts' work on seasonality shows that the August–October period has been the worst three‑month stretch of the year on average since 1928, but even in down years, the typical correction has been around 7%. That's not fun to live through, yet it's well within the range of what most investors would call a normal bull‑market pullback.

Zoom out further, and the picture is surprisingly reassuring. One study of intra‑year drawdowns since 1980 found that in more than half of calendar years, the S&P 500 has experienced a double‑digit decline at some point, with the average maximum drop around 13%, even in years that ultimately finished positive. In other words, sizable swoons are a regular feature of equity markets, not a bug. Historically, a mid‑teens drawdown has been something investors endure many times over a long investing life.

Midterm years add another wrinkle

August 2026 isn't just any August; it's landing in a U.S. midterm election year, which has its own pattern. Since 1950, the S&P 500 has suffered an average peak‑to‑trough decline of about 18% in midterm years, meaning corrections into double‑digit territory are common. Research from Carson suggests those corrections have, on average, bottomed in August. That doesn't guarantee this August is "the" low, but it does show why people talk about midterm summers as statistically fragile.

At the same time, midterm years often see markets recover after the uncertainty passes. Historical work on presidential cycles shows that while returns around midterms tend to be weaker and more volatile, the year after the midterm election has frequently been strong as policy clarity improves and investors refocus on fundamentals. If you're a long‑term shareholder, that pattern argues against overreacting to a seasonal dip that may set up better future returns.

What investors can do with this prediction

To me, the most useful way to treat an "August pullback" prediction is as a stress test for your plan, not as a trading signal. History says a garden‑variety pullback in the 5% to 15% range is very plausible, but also that such drops have been common and often temporary. If a decline of that size would force you to change your strategy or sell under pressure, the real issue is portfolio construction, not the calendar.

Practically, that can mean checking your allocation before volatility hits, making sure you're not over‑levered to hot sectors that have led the rally, and lining up a watch list of high‑quality companies you'd be happy to buy if prices reset. It also means being honest about time horizon. If you need cash in the next year or two, that money probably shouldn't be riding on the S&P 500's behavior in a historically weak month.

Bank of America is an advertising partner of Motley Fool Money. Micah Zimmerman has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.