Portfolio Rebalancing

Portfolio rebalancing is the process of adjusting holdings to bring a portfolio back to its intended allocation. Over time, markets move and asset values change at different speeds, which naturally causes the portfolio’s risk level to drift away from the original plan.

Rebalancing is not a market forecast and it is not about trying to “sell high and buy low” perfectly. Its main purpose is risk control-maintaining the portfolio’s structure so it stays aligned with your goals and risk profile through different market cycles.

When Rebalancing Is Needed

Rebalancing becomes important when one part of a portfolio grows disproportionately and begins to dominate overall risk. For example, after a strong stock market run, equity exposure may rise above target levels, increasing volatility and potential drawdowns beyond what the investor originally planned.

On the other side, extended declines can leave investors underexposed to growth assets if they become overly defensive. Without a rebalancing process, portfolios often become more aggressive near peaks and more conservative near lows, driven by market moves instead of strategy.

Simple Rebalancing Methods

There are two common approaches: time-based rebalancing (such as quarterly or annually) and threshold-based rebalancing (when allocations move beyond a defined range). Time-based rebalancing is simple and predictable, while threshold-based rebalancing can be more responsive but may lead to more frequent adjustments.

The best method is the one you can follow consistently. A clear set of rules reduces emotional decisions and helps investors avoid delaying adjustments due to headlines, fear, or short-term market predictions.

• Rebalancing restores the portfolio to its target allocation
• Controls risk as markets cause allocations to drift
• Time-based and threshold-based methods are both common
• Rule-based rebalancing reduces emotional decisions
• Consistency matters more than perfect timing