What is Rebalancing Band?
US investor education describes two common ways to rebalance: on a calendar schedule, or when an asset class's weight moves past a threshold set in advance. A band rule is the threshold approach; Academy's allocation case tests a band of ±5 percentage points checked at year-ends, a teaching choice rather than a standard. A band usually trades less often than a fixed annual rule, and because its trades depend on the path of returns, the same returns in a different order can give a different ending value.
Also called tolerance band, threshold rebalancing, rebalancing threshold
- Calendar rule
- Trade back to target on fixed dates, whatever the drift
- Band (threshold) rule
- Trade back only when a weight is outside the range
- Cash-flow approach
- Steer new contributions or withdrawals toward the underweight holding
A ±5-point band around a 60% target (illustrative)
- Range with no trade
- 55%–65%
- Year-end stock weight (no trade)
- 63%
- Year-end stock weight (trade back to 60%)
- 67%
- Exactly at the upper edge (no trade)
- 65%In Academy's case, a trade needs a gap of more than 5 points
Costs and taxes
Each rebalancing trade can carry commissions, a bid-ask spread and, in a taxable account, tax on gains. The band width is a policy choice, not a rule set by any regulator.