What Is Rebalancing?

Rebalancing is the process of adjusting a portfolio to maintain a desired asset allocation. 

Why Does Rebalancing Matter?

As markets fluctuate, portfolios naturally change.

Rebalancing helps investors:

Without rebalancing, portfolios may gradually become riskier or more conservative than intended.

How Does Rebalancing Work?

Suppose an investor starts with:

If strong stock performance causes the allocation to become:

The investor may sell a portion of stocks and increase bond exposure to restore the original 60/40 allocation and the goal is not to predict markets, but to maintain a consistent strategy.

Common Rebalancing Approaches

Calendar Rebalancing

Portfolios are adjusted at regular intervals, such as:

Threshold Rebalancing

Adjustments are made when allocations deviate beyond predetermined ranges. For example, rebalancing may occur if an asset class moves more than 5% away from its target weight.

Combination Approach

Many investors combine periodic reviews with allocation thresholds.

Benefits of Rebalancing

Risk Management

Rebalancing helps maintain the intended risk profile.

Diversification

It prevents excessive concentration in a single asset class.

Discipline

Rebalancing encourages systematic decisions rather than emotional reactions.

Long-Term Consistency

It keeps portfolios aligned with investment objectives over time.

Potential Drawbacks

Rebalancing may involve:

Because of these factors, excessive rebalancing may not always be desirable.

Rebalancing and Asset Allocation

Asset allocation determines the target portfolio structure and rebalancing helps maintain that structure over time. Together, they form an important part of long-term portfolio management.

Rebalancing and Market Timing

Rebalancing is not a market timing strategy and its purpose is to maintain risk exposure rather than predict future market movements.

Consistent rebalancing supports disciplined investing.

Key Takeaways

✓ Rebalancing restores a portfolio to its target asset allocation.

✓ Market movements naturally cause allocations to drift over time.

✓ Rebalancing helps manage risk and preserve diversification.

✓ Portfolios can be rebalanced using calendar schedules or allocation thresholds.

✓ Rebalancing focuses on discipline rather than forecasting.