But there are historical periods, especially choppy volatility ones, when the rebalancing bonus is significant enough to bend the mix of a blended portfolio well above either component by itself.
The Russian refusal to budge has played well with supporters of Russian President Vladimir Putin, who has cast it as a refusal to bend to Western pressure or sell out friends.
This web of well-intended federal rules predictably slows down the process of recovery as local officials seek a way to bend the general rules to meet their unique circumstances on the ground.
As well as moving any fallen trees from the river, the authority intends to clear the gravel bar at the bend in the Water of Ruchill, where it burst its banks, to reduce the pressure on the eroded bank.