Rebalancing is the process of adjusting your investment portfolio back to your original target mix of different asset types like stocks, bonds, and cash. Over time, some investments grow faster than others, throwing off your intended balance. For example, if you wanted 70% stocks and 30% bonds, but strong stock performance shifts it to 80% stocks and 20% bonds, rebalancing means selling some stocks and buying bonds to get back to your 70/30 target. This helps maintain your desired risk level and can improve returns by forcing you to “sell high and buy low” systematically.