A market correction is a drop of at least 10% but less than 20% in a major stock index from its most recent peak. These declines are a normal feature of investing, not a rare emergency: the S&P 500 has seen 37 of them since World War II, roughly one every two years, and the typical non-recessionary correction bottoms out after about four months with a decline near 14.7%.
Correction, Pullback, or Bear Market
There’s no regulatory definition, but the industry lines are consistent. A drop under 10% is a pullback, usually resolved quickly. Between 10% and 20% is a correction. Once losses cross 20%, it’s a bear market, and the behavior changes sharply: bear markets average about 18 months of decline alone and can take years to fully recover.
The word “correction” carries a specific implication. It suggests prices had climbed higher than earnings, revenue growth, and debt levels justified, and the market is resetting toward fair value. Misreading a correction as a bear market, or the reverse, is how investors sell at the worst possible moment.
What Triggers a Correction
Federal Reserve Rate Moves
Interest rate hikes are one of the most reliable catalysts. Higher rates raise borrowing costs, squeeze corporate profit margins, and make bonds and savings more attractive relative to stocks. Inflation reports drive much of this: when prices run hot, traders price in future hikes, and stock valuations fall as future earnings get discounted at higher rates.1Board of Governors of the Federal Reserve System. What Economic Goals Does the Federal Reserve Seek to Achieve Through Its Monetary Policy?
Earnings Disappointments
When large companies report profits below expectations, the effects spread through entire sectors. A string of weak reports across industries signals slowing economic activity and shakes confidence broadly.
Geopolitical and Supply Shocks
Trade disputes, armed conflicts, and abrupt policy shifts from major economies disrupt supply chains and raise input costs. Uncertainty is hard to model, so markets reprice risk quickly and investors rotate into perceived safe havens like Treasury bonds or gold, which accelerates the equity decline.
Yield Curve Inversions
The yield curve normally slopes upward because lenders demand more to tie up money longer. When short-term Treasury rates exceed long-term rates, the curve is inverted, and that inversion has preceded every U.S. recession since the 1970s with only one false signal in the mid-1960s.2Federal Reserve Bank of Chicago. Why Does the Yield-Curve Slope Predict Recessions? The inversion doesn’t cause the downturn; it reflects bond traders’ expectation that trouble is coming.
How Long a Correction Lasts
Corrections feel longer than they are. On the S&P 500, non-recessionary corrections have averaged roughly four months from peak to trough, with recovery to the previous high taking another four months or so. That’s about eight months for the full round trip.
Day-to-day swings can be violent while the market searches for a floor, which makes the experience feel chaotic even when the timeline is measured in months. For an investor with a five-year-plus horizon and a diversified portfolio, a correction is a temporary setback inside a much longer growth trend. Over a 30-year investing career, you can expect to sit through 15 or more of these.
How Margin Turns a Correction Dangerous
If you bought stocks with borrowed money, a correction becomes a different kind of problem. Federal Reserve Regulation T requires an initial 50% deposit when you buy on margin.3U.S. Securities and Exchange Commission. Understanding Margin Accounts After that, FINRA rules require you to maintain equity of at least 25% of the current market value, and many brokerages set their in-house threshold at 30% to 40%.4FINRA. 4210 – Margin Requirements
When falling prices push your equity below the maintenance level, the broker issues a margin call. The rules here are harsh: your broker isn’t required to give advance notice, isn’t required to give you time to respond, and can sell positions in your account at its discretion to restore the ratio.5FINRA. Know What Triggers a Margin Call The broker picks which holdings to liquidate, and it happens at depressed prices. Losses that would have been temporary for a cash investor become permanent for a margin investor.
Tax Rules to Know Before You Sell
Long-Term Capital Gains Rates
Investments held more than a year qualify for long-term capital gains rates of 0%, 15%, or 20%, depending on taxable income.6Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed For 2026, single filers pay 0% on long-term gains with taxable income below $49,450, and the 20% rate doesn’t apply until income tops $545,500. For married couples filing jointly, the 15% rate starts at $98,900 and the 20% rate at $613,700. Selling winners to raise cash during a correction can push you into a higher bracket than necessary if you don’t check where you stand.
The Wash-Sale Rule
Sell a stock at a loss and buy the same or a substantially identical security within 30 days on either side of the sale, and the IRS disallows the loss deduction entirely.7Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities The disallowed loss isn’t lost forever; it’s added to the cost basis of the replacement shares. But in the current tax year, the deduction is gone.
To stay clear of the rule, wait at least 31 days before repurchasing, or buy a similar but not substantially identical fund. Swapping one S&P 500 index fund for a total stock market fund is generally considered different enough, though the IRS hasn’t drawn a bright line on every combination.
The $3,000 Annual Loss Cap
When realized losses exceed gains for the year, you can deduct up to $3,000 of the net loss against ordinary income, or $1,500 if married filing separately. Remaining losses carry forward indefinitely.8Internal Revenue Service. Topic No. 409, Capital Gains and Losses There’s no cap on offsetting capital gains dollar-for-dollar, which is why tax-loss harvesting is most valuable in years you also have gains to absorb.
What to Do During a Correction
Rebalance to Your Target Allocation
A correction shifts your mix. A portfolio that started the year at 70% stocks and 30% bonds might drift to 64/36 after a 15% stock decline. Rebalancing means selling some of what held value and buying stocks at reduced prices to return to target, which is a disciplined way to buy low without having to guess the bottom.
Checking once a year, or when the allocation drifts more than five percentage points from target, generally strikes the right balance between staying on track and avoiding needless trading costs. Directing new contributions, dividends, and interest into the underweighted asset class handles much of the rebalancing without triggering taxable sales at all.
Keep Contributing on Schedule
Fixed contributions on a regular schedule mean a correction automatically buys you more shares at lower prices. The same $500 monthly contribution picks up more shares of an index fund at $40 than at $50, and when prices recover, those extra shares amplify the rebound. This is dollar-cost averaging, and its main value is behavioral: it keeps you investing when instinct says stop.
Don’t Move to Cash and Wait
The most costly mistake during a correction is selling everything and sitting in cash until the market feels safe again. The market’s best days tend to cluster near its worst days, and missing even a handful of the strongest recovery sessions cuts long-term returns sharply. By the time the news feels reassuring enough to buy back in, much of the recovery has already happened. That gap, more than the correction itself, is what turns a temporary decline into a permanent loss.