Step 10
Level: beginner
Rebalancing helps bring a portfolio back to its target weight after the market causes some assets to increase or decrease excessively. If only looking at each individual position, investors easily ignore the aggregate risk of the entire asset.
Rebalancing can be scheduled, based on deviation thresholds, or a combination of both. Rebalancing forces investors to trim assets that have increased in weight and add to assets that have decreased relatively, but consider taxes, fees, liquidity and changes in the fundamental thesis. A good portfolio needs to both serve its goals and withstand fluctuations and changes in investors' lives.
When there are clear rules on weight, review, rebalancing and stress testing, investors are less likely to have to make decisions in a state of panic or excitement.
Rebalancing helps bring a portfolio back to its target weight after the market causes some assets to increase or decrease excessively.
Managing a portfolio is different from choosing a good investment idea. A good asset can become risky if the weight is too large, the time horizon is unsuitable or the correlation with the rest of the portfolio is too high. Therefore, the focus of Step 10 is on how to run the portfolio according to the chosen goal.
Rebalancing can be scheduled, based on deviation thresholds, or a combination of both. Rebalancing forces investors to trim assets that have increased in weight and add to assets that have decreased relatively, but consider taxes, fees, liquidity and changes in the fundamental thesis.
Portfolios should be evaluated in three layers. The first layer is the goal: what the portfolio is meant to serve and for how long. The second layer is structural: asset weights, correlation, liquidity and concentration risk. The third layer is operational: when to review, when to rebalance, when to reduce risk, and when to do nothing.
Set rebalancing rules before the market fluctuates, for example quarterly or when weights are off by more than 5 percentage points.
Portfolio rules need to be measurable. For example: maximum weight of a position, minimum cash weight, rebalancing threshold, drawdown level to review or stress test schedule. If the rule is just a general intention, it is often broken when the market is volatile.
Not rebalancing because assets are performing well, making the portfolio quietly riskier.
Mistakes often do not come from a single position, but from many small deviations that accumulate: excessive weight, shared-source risk, failure to rebalance, lack of cash or emotional behavior. Good portfolio management is about detecting these deviations before they become major losses.
Adjust portfolio to target weight after deviation.
Only rebalance when the weight exceeds a predetermined level.
The desired weight of each asset class or group of positions in the portfolio.
Portfolios can serve long-term growth, capital preservation, income generation, medium-term goals or a combination of goals.
Portfolio risk can come from asset class, industry, individual positions, liquidity, leverage, correlation or investor behavior.
The portfolio needs rules on weight, rebalancing, review, stress testing, cash and action triggers.
Application in portfolio management
The target portfolio of 60 percent stocks, 40 percent bonds could become 75/25 after a strong market increase. Rebalancing helps reduce stock risk to planned levels.
Actual risks
Not rebalancing because assets are performing well, making the portfolio quietly riskier. When this happens repeatedly, the portfolio can deviate from its original goals, with the investor only realizing after the damage has been done.
Returns alone do not show what risk the portfolio is taking on. Monitor weight, drawdown, liquidity and target deviation.
If investors do not know when to review or rebalance, they can easily delay until emotions take over.
Not rebalancing because assets are performing well, making the portfolio quietly riskier. Safety depends on the source of risk and concentration, not just the number of assets.
Exercise 1 - reflection
What issues does your current portfolio exhibit regarding portfolio rebalancing? Describe with data if possible.
Exercise 2 - case_study
The target portfolio of 60 percent stocks, 40 percent bonds could become 75/25 after a strong market increase. Rebalancing helps reduce stock risk to planned levels. Identify portfolio risks, signals that need to be reviewed and define the appropriate action.
Exercise 3 - action_plan
Create five portfolio operating rules that you will use over the next 12 months.