These days, many people don't even want to look at their portfolio, let alone think about rebalancing it. But you developed an asset allocation strategy for a reason -- you wanted to control the risk in your portfolio by deciding how to allocate among different asset classes. Your portfolio won't stay within that allocation by itself. Since different investments earn different rates of return, over time your allocation will get out of line. To keep your allocation in line, you need to review your portfolio periodically and make adjustments to rebalance it.
While the theory of rebalancing is easy enough to understand, rebalancing is often a difficult concept for investors to implement. The problem is rebalancing goes against your basic instincts. With rebalancing, you are basically selling those investments performing well to purchase those that are underperforming. It might help to remember that, by rebalancing, you are following a basic investment principle -- you are buying low (those investments that are underperforming) and selling high (those investments that are performing well).
Decide how you want to rebalance and then follow through. There are three basic approaches to rebalancing:
- Rebalance annually. You can choose a date to rebalance, perhaps the beginning of the year, when you receive your annual statements, or at the end of a quarter. On that date every year, you compare your current allocation to your target allocation. Any allocations off by more than 5-10% would require rebalancing. Once you have rebalanced, don't be tempted to make other rebalancing changes during the year. Wait for your next rebalancing date.
- Rebalance whenever your allocation moves away from your target allocation by a designated percentage. With this type of rebalancing, you monitor your portfolio more frequently, perhaps monthly. Once your allocation moves from your target allocation by a certain predetermined percentage, perhaps 5-10%, you rebalance your portfolio.
- Rebalance based on your views about current market conditions. With this approach, rather than one specific percentage for each asset class, you might have a target range. For instance, you might allocate from 30% to 50% of your portfolio to large-cap stocks. Depending on your views of the market, you might want to allocate near the low or high end of that range. Thus, your allocations will change as your views about the market change.
Once you've decided what needs to be rebalanced, you need to implement those changes. If the change is within a tax-deferred account, such as a 401(k) plan or Individual Retirement Account(IRA), you can typically make these changes without tax ramifications. With taxable accounts, you'll want to consider the tax ramifications before implementing the changes. If selling an asset will result in a tax liability, consider other methods to implement the change. For instance, new investments can be made in the underweighted portion of your portfolio, or you can redirect periodic interest, dividends, or capital gains to the underweighted portion. If you will be making withdrawals, take them from the overweighted portion of your portfolio. However, if you can't implement the changes in a relatively short period, you might want to actually sell some investments. If the sale generates a gain, you might be able to sell other investments at a loss to offset that gain.