Simple definition
Rebalancing is resetting your investments back to the mix you chose when markets pull them out of line. If you aim for 70% stocks and 30% bonds, a strong stock run might push you to 80/20 — more risk than you planned. Rebalancing sells some of what grew and buys what lagged, like trimming an overgrown hedge back to shape. It keeps your risk where you want it.
Why it matters
Left alone, a portfolio drifts toward whatever's been hot, quietly raising your risk right when a downturn could hurt most. Rebalancing enforces a disciplined 'sell high, buy low' habit and keeps your investments aligned with your goals and comfort with risk, instead of chasing the market.
Real-life example
You target 70% stocks and 30% bonds on a $100,000 portfolio. After a strong year, stocks grow until you're at $80,000 stocks and $20,000 bonds — an 80/20 split. To rebalance, you sell $10,000 of stocks and buy bonds, restoring your 70/30 mix and your intended risk level.
Common mistakes
- Never rebalancing and letting risk quietly creep upward.
- Rebalancing so often that fees and taxes eat the benefit.
- Only buying more of whatever's been winning lately.
- Ignoring the tax hit of selling in a taxable account.
Pro tips
- Pick a simple rule, like once a year or when a holding drifts 5%.
- Rebalance with new contributions to avoid selling and taxes.
- Do taxable rebalancing carefully to limit capital gains.
- Let target-date funds rebalance automatically if you prefer hands-off.
Related Money Dictionary terms
- Asset AllocationHow you split your money among stocks, bonds, and cash — the biggest driver of risk and growth.
- PortfolioThe full collection of investments you own, such as stocks, bonds, and funds held across your accounts.
- DiversificationSpreading your money across many different investments so a drop in any single one does less damage.
- Index FundA fund that owns a broad slice of the market at low cost — the backbone of most investing.
- Target-Date FundAn all-in-one investment that automatically shifts to safer holdings as you approach a chosen retirement year.
- Risk ToleranceHow much investment ups and downs you can handle emotionally and financially without changing your plan.
Frequently asked questions
How often should I rebalance?
There's no perfect schedule. Many investors rebalance once a year, or whenever a holding drifts more than a set amount, such as 5%, from its target. Rebalancing too often can rack up fees and taxes with little benefit. A simple, consistent rule you'll actually follow beats trying to time it perfectly.
Does rebalancing trigger taxes?
In a taxable account, selling investments that gained can create capital gains taxes. In tax-advantaged accounts like an IRA or 401(k), rebalancing generally has no immediate tax impact. To limit taxes, you can rebalance mostly inside retirement accounts or steer new contributions toward the holdings that have fallen below your target.
Do target-date funds rebalance for me?
Yes. A target-date fund automatically rebalances and gradually shifts to a more conservative mix as its target year approaches, so you don't have to do it yourself. That hands-off design makes them popular in retirement accounts. The tradeoff is less control over the exact mix compared with managing your own allocation.
Knowing what Rebalancing means is knowledge — the first half. A brick gets placed when you act on it: check your current stock-to-bond mix against your target and rebalance if it has drifted more than 5%.
Also builds: Retirement Accounts
Sources & references
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Plain-English education — not personalized legal, tax, or investment advice.