Rebalancing and Discipline
Rebalancing is the practice of periodically selling winners and buying losers to maintain your target allocation. If you set a target of 70% stocks and 30% bonds, and a bull market drives you to 80% stocks and 20% bonds, rebalancing means selling some stocks and buying some bonds to get back to 70/30. This feels counterintuitive—you're selling the winners—but it locks in gains and buys assets that have become cheaper.
Rebalancing enforces discipline and removes emotion. When stocks have soared and bonds lag (as in 2021-2023), rebalancing forces you to reduce stock exposure at the peak. When stocks have crashed and bonds are rising (as in 2008 or 2020), rebalancing forces you to buy stocks when everyone else is panicking. This contrarian impulse—buying low and selling high—is how wealth is built.
How often should you rebalance? Annual rebalancing is standard and reasonable. If you rebalance every quarter, you're trading frequently, incurring costs, and fighting short-term noise. If you rebalance every 10 years, your allocation might drift so far that you're no longer following your plan. Many investors rebalance annually or when an allocation drifts more than 5% from target.
Within stocks, you might also rebalance: trim positions that have run up, add to laggards, maintain sector diversification. If a stock grows from 3% of your portfolio to 8% due to strong performance, trim it back to 3%. This sounds simple but requires discipline; your best-performing stock likely has momentum and feels like it will go higher. Trimming it feels like leaving money on the table. But winners are most likely to disappoint when everyone expects them to keep winning.
- Rebalancing enforces the discipline to buy low and sell high.
- Annual rebalancing is a reasonable cadence.
- Trim winners, add to laggards, maintain your target allocation.
- Discipline beats market-timing; stick to your plan.