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📊 Portfolio Management7 min🤖 Written by QMA Brain (AI)

⚖️When and How to Rebalance Your Portfolio? Threshold-based vs Time-based

2026-05-10 · 219 views

When and How to Rebalance Your Portfolio?

Rebalancing your portfolio is a key part of effective investment management. It ensures that your investment allocation changes to reflect your goals and risk tolerance. There are two main approaches to rebalancing: threshold-based and time-based. In this article, we will explore both approaches and also discuss the integration of tax-loss harvesting, while leveraging our QMA Portfolio Health Check to assess your portfolio.

Threshold-Based Rebalancing (5/25 Rule)

One of the most common approaches is threshold-based rebalancing, which usually involves setting certain thresholds for individual investments. For example:

  • 5/25 Rule: If the percentage allocation of a particular stock in your portfolio deviates by more than 5% from the target weight, or if the stock's weight exceeds 25% of the total portfolio, it’s time to rebalance.

Example: If you have a portfolio with a target allocation of 60% stocks and 40% bonds, and one stock, for instance, AAPL, increases to 30%, it would be appropriate to sell a portion of AAPL and reinvest in bonds to maintain the target allocation.

Advantages and Disadvantages of Threshold-Based Rebalancing

  • Advantages:
- Ensures that your portfolio stays aligned with your investment strategy - Rebalancing is done based on specific data, reducing psychological stress for the investor
  • Disadvantages:
- Can lead to more frequent transactions, increasing fees - When markets move sharply, rebalancing can result in losses

Time-Based Rebalancing (e.g., Quarterly)

The second approach is time-based rebalancing. This approach involves regularly reviewing your portfolio at a set time period, typically quarterly or annually. Regardless of market fluctuations, rebalancing will occur even if the weights remain within the original set limits.

Advantages and Disadvantages of Time-Based Rebalancing

  • Advantages:
- A planned approach that reduces the need to monitor the market - Suitable for investors with a lower risk tolerance and for those who prefer systematic approaches
  • Disadvantages:
- May overlook situations where threshold-based rebalancing could yield better results - You might rebalance unnecessarily, especially if conditions don’t warrant it

Integrating Tax-Loss Harvesting

Another important aspect of portfolio rebalancing is integrating tax-loss harvesting. This strategy is utilized to reduce taxes on capital gains. The process involves selling losing investments within the portfolio to offset profitable investments.

How Does It Work?

  1. Identify losing investments you want to sell.
  2. Consider purchasing a similar investment to avoid the wash-sale rule.
  3. Use the loss to offset taxable gains and reduce overall tax burden.

How to Use QMA Portfolio Health Check

The QMA Portfolio Health Check tool is ideal for analyzing and optimizing your portfolio. With this tool, you can:

  • Obtain a 5-pillar score to measure your portfolio's health
  • Identify diversification and risk
  • Assess the performance of individual stocks, including considerations for tax strategies
  • Set alerts for threshold-based or time-based rebalancing

This tool will help you make informed decisions regarding your portfolio and optimize its health.

Where to Find This in QMA

All the tools and strategies mentioned above can be found directly on the QMA platform. Check out our Portfolio Health Check section and discover how you can improve your portfolio.

Conclusion

Rebalancing a portfolio is a crucial part of investment management. Whether you choose a threshold-based or time-based approach, it is essential to monitor and adjust your portfolio regularly in line with your investment goals and risk tolerance. Also, remember to factor in tax-loss harvesting to optimize your costs.

--- Consult your advisor before making any investment decisions.*

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Content created by AI in collaboration with Jaroslav Vojtášek. Not investment advice. The author may hold the stocks mentioned. Investing involves risk of loss.

Operator: Jaroslav Vojtášek, Company ID (IČO) 48783447.

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