Optimal Rebalancing Frequency/Months?

Posted in Calendar Effects, Strategic Allocation

 

Is there a preferred frequency and are there preferred month(s) for rebalancing conventional asset class portfolio holdings? To investigate we consider annual, semiannual and quarterly rebalancing of a simple portfolio targeting a 60-40 stocks-bonds mix. We consider all possible combinations of calendar month ends as rebalancing points. Because of estimation complexity, we ignore rebalancing (and dividend-reinvestment) frictions and tax implications, thereby giving an advantage to frequent rebalancing. Using dividend-adjusted monthly closes for SPDR S&P 500 (SPY) to represent stocks and Vanguard Total Bond Market Index (VBMFX) to represent bonds over the period January 1993 (SPY inception) through April 2015 (268 months or about 22 years), we find that: (more…)

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