War and Your 401(k): What History Shows

When headlines scream about military escalation, your first instinct may be to check your 401(k) balance. And when you see it has dropped 10% or 15%, the urge to sell everything and move to cash feels overwhelming. That instinct is natural. It is also one of the most expensive financial mistakes you can make.

Here is what historical data actually shows about how markets behave during armed conflicts and what the evidence says you should do with your retirement savings.

Historical Market Performance During Major Conflicts

The stock market has survived every war in modern history. Not just survived, but recovered and grown:

• World War II (1941-1945): The S&P 500 dropped 20% after Pearl Harbor, then gained 130% by war's end. Total return: roughly 82%.
• Korean War (1950-1953): Initial decline of 12%, recovery within 6 months. S&P 500 returned about 60%.
• Vietnam War (1964-1975): Markets were volatile but the S&P 500 still returned about 43% over the period.
• Gulf War (1990-1991): Markets dropped 17% leading up to the war, then rallied 33% in the following 12 months.
• Iraq/Afghanistan (2001-2003): Combined with the dot-com bust, markets fell 49% peak-to-trough. Full recovery took until 2007.
• Russia-Ukraine (2022): Initial selloff of 13%, followed by a full recovery within 8 months.

The average drawdown at the onset of major conflicts is approximately 15%. The average time to full recovery is 12-18 months. Use our 401(k) calculator to see how temporary drawdowns affect your long-term retirement projections.

Why Should You Avoid Selling Your 401(k) During a War?

When you sell during a downturn, you lock in losses and then face the hardest decision in investing: when to get back in. Between 2003 and 2023, if you missed just the 10 best trading days, your annualized return dropped from 9.7% to 5.5%. Six of those 10 best days occurred within two weeks of the 10 worst days. The cost of being out of the market during recovery is far greater than riding through the decline.

What You Should Actually Do

Keep Contributing

Do not stop your 401(k) contributions. When markets drop, your regular contributions buy more shares at lower prices. This is dollar-cost averaging, and it is your greatest advantage as a long-term investor.

Rebalance, Do Not Panic

If your target allocation is 80% stocks and 20% bonds, a market decline may shift you to 70/30. Rebalancing means buying more stocks at lower prices to return to your target.

Review Your Timeline

If you are 20+ years from retirement, a 15% drawdown is noise. If you are within 5 years, you should already have a more conservative allocation. Use our retirement calculator to model different scenarios.

Increase Contributions If You Can

Market downturns are actually the best time to increase your 401(k) contribution rate. You are buying assets at a discount.

When to Worry (And When Not To)

• Worry if: You are within 2-3 years of retirement with an aggressive allocation, have no emergency fund, or are concentrated in specific sectors.
• Do not worry if: You are 10+ years from retirement, have 6+ months of emergency savings, and hold a diversified portfolio.

Check your 401(k) projections with our 401(k) calculator, model compound growth at our compound interest calculator, and build a comprehensive retirement plan with our retirement calculator.

Practical Portfolio Moves During Volatile Markets

Beyond "don't panic," a few specific, low-drama actions are worth considering. None of them require predicting what happens next.

• Understand what steady contributions do. If prices fall 20%, the same $500 contribution buys 25% more shares than before the drop (1 / 0.80 = 1.25). Continuing to invest through a decline is the practical mechanism behind dollar-cost averaging, though it does not guarantee a profit.
• Rebalance back to your target. If a decline moves a 70/30 stock-bond mix to 60/40, rebalancing sells some of what held up and buys stocks at lower prices. Many 401(k) plans can do this automatically once a year.
• Add inflation protection if energy and food prices are a concern. TIPS and I bonds are designed to keep pace with inflation; a small allocation to broad commodities is another option some investors use. See our inflation guide for how these work.
• Check for concentration. If a single company or sector is 30% or more of your holdings, including company stock in your 401(k), consider trimming it regardless of headlines.
• Consider tax-loss harvesting in taxable accounts only. Selling a losing position to realize a loss, then buying a similar (not substantially identical) fund, can offset gains and up to $3,000 of ordinary income per year. It does not apply inside a 401(k) or IRA, and the wash-sale rule disallows the loss if you buy the same or a substantially identical security within 30 days before or after the sale.
• Match risk to timeline, not to the news. Money you need within about five years usually belongs in lower-volatility holdings whatever the market is doing. If a downturn would force you to sell, that is a sign to revisit your allocation and emergency fund, not to time the market.

Historical patterns are context, not a guarantee: past recoveries do not promise the same outcome next time, and every conflict and market backdrop is different. If you are within a few years of retirement or unsure about your allocation, consider talking with a fee-only financial planner.

The Bottom Line

Wars are terrible. Markets during wars are volatile. But the historical record is unambiguous: investors who stay the course during conflicts come out ahead. Every single time. The worst thing you can do for your 401(k) during a war is sell. The best thing you can do is keep contributing and let time and compounding work.