Incomplete trading rebalances an overweight asset only far enough to return within a permitted tolerance, rather than fully restoring its target weight. It can preserve some drift when completing the trade would realize costly gains. section 13.2.3
Selling only part of an overweight position
With a 1% rebalancing tolerance, an asset 3% above target need only be sold until it falls within that tolerance. This can avoid realizing short-term gains and paying a larger tax bill. section 13.2.3
