When I set out my Investing Strategy some years ago, which included my initial asset allocation as well as how that allocation would change over time, I effectively established a portfolio risk vs return characteristic. Over time that asset allocation has and will continue to change as different asset classes provide different returns in relation to each other. To recapture the required portfolio risk vs return characteristic I then need to periodically rebalance the portfolio. Importantly, I rebalance to manage risk rather than to maximise returns. Over the years I've found that I follow effectively two types of rebalancing – what I call Active and Passive Rebalancing.
With this in mind and given my whole mantra has always been to minimise expenses and taxes I instead adopted and have stayed with a valuation based rebalancing approach. This is not complicated and is simply if any asset allocation moves more than 25% away from a nominal holding I will either sell or buy (as appropriate) enough of that asset to move the allocation back to nominal. This methodology plus the Passive Rebalancing element, which I’ll cover in a minute, has meant I've been forced to do very infrequent rebalancing.
Active Rebalancing
Active is what you will predominantly read about in books or online. There is not much conflict out there as to what it is. It is simply selling down the assets that have performed the best and using those funds to top up those assets that have performed the worst. What you will see plenty of conflict about is the frequency of when you should rebalance. I've seen preset frequencies talked about which could be monthly, quarterly, half yearly, annually or even longer periods. It could also be triggered by a memorable date such as a birthday or the New Year. Personally I'm conscious that every time I rebalance Actively it’s likely I’ll be staring down the barrel of trading expenses, possibly taxes and certainly lost time that could be spent doing something else.With this in mind and given my whole mantra has always been to minimise expenses and taxes I instead adopted and have stayed with a valuation based rebalancing approach. This is not complicated and is simply if any asset allocation moves more than 25% away from a nominal holding I will either sell or buy (as appropriate) enough of that asset to move the allocation back to nominal. This methodology plus the Passive Rebalancing element, which I’ll cover in a minute, has meant I've been forced to do very infrequent rebalancing.