Rebalancing: The First Step in Understanding Portfolio Changes

Rebalancing is an important concept that is frequently mentioned in investing. However, many investors often do not understand the true meaning and necessity of this process. If on a recent trading day, certain stocks in an existing portfolio decreased while new ones were added, this is not simply an arbitrary decision made by someone. Rebalancing is a systematic process that regularly checks the differences between target allocations and current status, and makes judgments accordingly.

The Necessity and Process of Rebalancing

Rebalancing in GC is not just about changing stocks. It involves regularly comparing the performance, signals, and holdings of the portfolio to determine whether replacements are necessary. This process is designed to set criteria and only make changes when these criteria are exceeded. For example, rebalancing will only occur if the weight of a specific asset class exceeds or falls below 5% of the target weight. In other words, rebalancing is a regular and systematic management method to maintain the balance of the portfolio. Therefore, it is important to remember that not every change is necessarily required.

Criteria for Replacement Decisions

When rebalancing occurs, existing positions are reviewed and new candidates for inclusion are considered in turn. What is important here is to have a threshold so that changes are not made every day, but only when there is a significant difference. For instance, if the performance of a particular stock remains below average for three months, replacing that stock may be considered. This is not based on the investor's judgment, but rather on a rules-based process. Therefore, days with no changes should be accepted as a normal outcome. Rebalancing is the optimal way to enhance the quality of decision-making and ensure investment sustainability in the market.

Limitations of Rebalancing and Building Trust

Having criteria for rebalancing does not guarantee the optimal timing for stock replacements. Transaction costs or sudden market changes can occur at any time. GC acknowledges these limitations and emphasizes that rebalancing is not merely a device for predicting the future. This aligns with GC's principle of 'not hiding the basis for judgment' as part of building trust. We exclude logic without predictive power and transparently disclose results to provide users with trust.

Understanding the importance of rebalancing and its process can greatly assist in making investment decisions. Participate in the GC Investor Challenge to experience portfolio changes firsthand and gain a deeper understanding of this process. Investment decisions ultimately depend on the judgment of the user.