Asset allocation is the process of dividing your investments among different asset categories like stocks, bonds, and cash to balance risk and reward according to your goals, risk tolerance, and investment timeline.
Research shows that asset allocation is responsible for about 90% of the variability in a portfolio's returns over time. It's more important than individual stock or fund selection.
A common rule of thumb suggests subtracting your age from 110 to determine the percentage of your portfolio that should be in stocks.
For example, if you're 30 years old: 110 - 30 = 80% in stocks, 20% in bonds/cash.
As market movements change the values of your assets, your allocation will drift from your target. Periodic rebalancing (selling higher-performing assets to buy lower-performing ones) helps maintain your desired risk level.
Use the Wealth Calculator to see how these concepts can be applied to your own financial planning.