Kevin Kroskey's Money & Mind

Global diversification gives investors a valuable tool for managing risk and volatility in a portfolio. But smart diversification has an important side effect. It requires maintenance. In a given period, asset classes experience divergent performance. This is inevitable and, in fact, desirable. A portfolio that holds assets that do not perform similarly (i.e., with low return correlation) will experience less overall volatility. That results in a smoother ride over time. However, dissimilar performance also changes the integrity of your asset mix, or allocation—a condition known as “asset drift.” As some assets appreciate in value and others lose value, your portfolio’s allocation changes, which affects its risk and return qualities. If you let the allocation drift far enough away from your original target, you end up with a different portfolio. Once you form a portfolio to match your current investment goals and risk tolerance, you should preserve its structural integrity since as