Some recent research on rebalancing: There's a tradeoff between staying true to the desired asset allocation -- versus: execution costs (commission and slippage), and normal market action (fluctuations, trends).
Rebalancing too frequently can create extra costs. On the other hand, rebalancing infrequently allows the asset mix to drift -- and can increase risk (nominal risk and risk relative to the desired mix). Based on other publications -- as well as Monte Carlo simulations I performed -- the data DOES show that rebalancing too frequently can give up some gains in exchange for potential expected asset mix drift. This is evidence of how markets can trend -- and yield excess performance for holding assets that are trending... (But some of these topics might be the topic of other research/articles)... The "sweet spot" for rebalancing seems to be 6-14 months, depending on the assets/investment vehicles -- and investment goals.
Interestingly, some products (like commodity indices) are designed to rebalance annually rather than monthly (or even daily)...
Rebalancing too frequently can create extra costs. On the other hand, rebalancing infrequently allows the asset mix to drift -- and can increase risk (nominal risk and risk relative to the desired mix). Based on other publications -- as well as Monte Carlo simulations I performed -- the data DOES show that rebalancing too frequently can give up some gains in exchange for potential expected asset mix drift. This is evidence of how markets can trend -- and yield excess performance for holding assets that are trending... (But some of these topics might be the topic of other research/articles)... The "sweet spot" for rebalancing seems to be 6-14 months, depending on the assets/investment vehicles -- and investment goals.
Interestingly, some products (like commodity indices) are designed to rebalance annually rather than monthly (or even daily)...
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