Rebalancing
Rebalancing means periodically adjusting a portfolio back to its target allocation, selling some of what has grown beyond its share and adding to what has fallen below it.
Why a portfolio drifts
Every portfolio starts with a plan for how much goes where, for example 60% in one asset and 40% in another. As prices move, those shares change on their own. In crypto, where assets can rise or fall sharply within weeks, a portfolio can drift far from its original mix without you buying or selling anything.
Drift matters because it quietly changes your risk. If the most volatile asset grows to dominate the portfolio, a single decline hurts much more than you originally signed up for.
An example
Say you hold 10,000 dollars split 50/50 between BTC and a stablecoin. BTC doubles, so the BTC part is now worth 10,000 and the stablecoin part still 5,000, a 67/33 split. To return to 50/50 you would sell about 2,500 dollars of BTC and hold it in the stablecoin, ending with 7,500 in each. If BTC had halved instead, you would move stablecoins into BTC.
Common methods
Calendar rebalancing resets the portfolio on a fixed schedule, such as every quarter. Threshold rebalancing acts only when an asset drifts beyond a set band, for example more than 5 percentage points from its target. Some investors combine both, and some direct new deposits into underweight assets instead of selling anything.
Rebalancing is rule-based by design: it systematically trims what has risen and adds to what has fallen, which removes some emotion from decisions.
Costs and trade-offs
Every trade can cost fees, spread and slippage, and in many countries selling at a profit is a taxable event. Rebalancing too often can eat returns. In a strong, long trend it can also mean repeatedly selling the asset that keeps rising, so it is mainly a risk-control tool rather than a way to boost returns.
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Frequently asked questions
How often should a portfolio be rebalanced?
There is no single correct interval. Quarterly or yearly schedules and drift bands of several percentage points are common choices; the right one depends on costs, taxes and how much drift you can tolerate.
Does rebalancing increase returns?
Not reliably. Its main purpose is to keep risk in line with your plan, and depending on how markets move it can help or reduce returns.
Can rebalancing be automated?
Yes. Some platforms and on-chain index products rebalance automatically according to preset rules, though you still pay the trading costs and take on the risk of the platform or smart contract.
Related terms
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