What Is Rebalancing (And Why It Matters for Endowments)
Updated: Oct 13
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A portfolio can change even when no one touches it.
That may sound strange, but it happens all the time.
Imagine a nonprofit starts the year with a portfolio that is split evenly between stocks and bonds. Then stocks have a particularly strong year. By the end of it, stocks may represent a much larger portion of the portfolio than they did when the year began.
Nothing was added. Nothing was sold. The market simply moved.
Now the organization may be taking more risk than it originally intended.
That is where portfolio rebalancing comes in.
Rebalancing is the process of adjusting a portfolio back toward its intended asset allocation. For nonprofits and endowments, it is one of the ways an organization can keep its investment strategy aligned with the plan it originally approved.
What is Portfolio Rebalancing?
More specifically, Portfolio rebalancing means bringing an investment portfolio back toward its target mix after market movement causes it to drift.
If an organization decides that a certain percentage of its assets should be invested in stocks, bonds, cash, or other areas, those percentages will naturally change over time.
Some investments will grow faster than others. Some will decline. Various parts of the portfolio may grow while others shrink.
That movement is called portfolio drift.
Rebalancing is how the organization responds to that drift.
It may involve trimming an area that has grown beyond its target and adding to an area that has fallen below its intended level. The goal is to keep the portfolio aligned with the organization’s original strategy.
Why Does Portfolio Drift Matter?
Portfolio drift can quietly change the amount of risk an organization is taking.
Suppose a nonprofit begins with a portfolio designed to balance long-term growth with stability. After several strong years in the stock market, equities grow into a much larger share of the portfolio.
The organization may now have a portfolio with greater growth potential, but it may also face larger losses if the market declines.
That matters because nonprofit investment assets commonly support real organizational demands. The portfolio may help fund programs, provide annual distributions, strengthen reserves, or support an endowment intended to last for generations.
A shift in the portfolio can eventually become a shift in the organization’s financial position.
Rebalancing helps keep those changes intentional.
Rebalancing Starts with Asset Allocation
Before an organization can rebalance, it needs to know what it is rebalancing toward.
That is why asset allocation comes first.
Asset allocation determines how to divide the portfolio among different types of investments based on the organization’s goals, time horizon, spending needs, liquidity requirements, and risk tolerance.
Once that framework is established, rebalancing helps maintain it.
Think of asset allocation as the map, and rebalancing as one way the organization stays on course.
Why Rebalancing Can Feel Uncomfortable
Rebalancing often asks investors to do something that feels counterintuitive.
It may mean reducing an investment that has been performing well and adding to an area that has recently struggled.
That can be difficult.
When one part of the portfolio has delivered strong returns, it feels natural to want to keep more money there. When another area has disappointed, adding to it may feel far less appealing.
But investment decisions based only on recent performance can gradually pull the portfolio away from the strategy the organization intended to follow.
Rebalancing introduces discipline and true governance into that moment.
Instead of asking which investment feels most attractive today, the organization returns to a different question: Does the portfolio still reflect what we need it to do?
Rebalancing is Not Market Timing
Rebalancing and market timing are very different.
Market timing is an attempt to predict when markets will rise or fall and move investments accordingly.
Rebalancing is based on the organization’s existing plan.
The decision is not driven by a prediction about what the market will do next. It is driven by the fact that the portfolio has moved away from the organization’s intended allocation. That distinction matters.
A board or investment committee does not need to know where the market is headed next in order to recognize that its portfolio is carrying more risk than intended.
Rebalancing gives the organization a process for responding without being forced to make a forecast.
How Often Should a Nonprofit Rebalance?
No single schedule works for every nonprofit.
Some organizations review their portfolios on a regular calendar, such as quarterly or annually. Others use percentage ranges around each target allocation and consider rebalancing when an asset class moves beyond those limits.
The key is defining the process in advance.
A clear approach may help boards and investment committees avoid making rebalancing decisions based on emotion, headlines, or short-term performance.
The organization knows what it monitors, what may trigger action, and who is responsible for the decision.
For many nonprofits, these expectations are documented in an Investment Policy Statement, or IPS.
A nonprofit investment policy statement can outline the portfolio’s target allocation, acceptable ranges, and responsibilities for monitoring and rebalancing.
This gives future board and committee members a clear framework to follow, even as leadership changes.
Rebalancing and Diversification
Rebalancing also helps preserve diversification.
A portfolio may begin with a thoughtful mix of investments, but strong performance in one area can cause that portion of the portfolio to grow much larger over time.
If left unchecked, a diversified portfolio can slowly become more concentrated.
Rebalancing helps restore the intended balance.
For nonprofits, that means diversification is not something that happens once when the portfolio is created. It needs to be monitored and maintained.
What Happens During Market Volatility?
Rebalancing can become especially important during periods of market volatility.
When markets move quickly, portfolios can drift faster than usual. Those same periods can also create the most pressure for boards and committees to react.
That combination makes discipline especially valuable.
A defined rebalancing process gives the organization something concrete to return to when markets become uncomfortable. Instead of making decisions based on fear or recent headlines, leadership can evaluate the portfolio against the strategy it already established.
That does not mean every market decline should trigger a trade.
It means the organization has a framework for deciding when action is appropriate and when staying the course makes more sense.
Rebalancing Should Reflect the Organization
Like every part of a nonprofit investment strategy, rebalancing should reflect the organization’s actual needs.
An endowment with a long time horizon may approach portfolio drift differently than a reserve account that could be needed in the near future.
Cash flows matter too.
If an organization regularly adds new contributions or takes distributions, those cash flows may be used to move the portfolio closer to its target allocation without selling existing investments.
The process should fit the portfolio, not force every organization into the same formula.
A Practical Question for Boards
Boards and investment committees do not need to manage every trade themselves, but they should understand how rebalancing fits into the investment program.
A useful question is:
If our portfolio moves away from its target allocation, what happens next?
The answer should be clear.
Who is monitoring it? What amount of drift would prompt a review? Who has authority to act? How does the process connect back to the organization’s IPS?
If those answers are uncertain, the rebalancing process may need more definition.
Final Thoughts
Portfolio rebalancing is one of the quiet disciplines behind a long-term investment strategy.
It helps a nonprofit keep the portfolio aligned with the amount of growth, stability, and risk it originally intended.
Markets will continue to move. Some investments will lead while others fall behind. Over time, those differences can reshape the portfolio.
Rebalancing gives the organization a way to ensure those changes do not quietly shift the strategy, too.
For nonprofits and endowments, that consistency matters.
The portfolio should continue reflecting the mission, financial needs, and responsibilities it was built to support.
Portfolio Rebalancing FAQs
What is portfolio rebalancing in simple terms?
Portfolio rebalancing is the process of adjusting investments back to the portfolio’s intended mix after market movements change the percentages.
Why is rebalancing important for nonprofits?
Rebalancing can help keep a nonprofit’s investment portfolio aligned with its intended level of risk, spending needs, and long-term goals.
How often should a nonprofit rebalance its portfolio?
There is no universal schedule. Sometimes investments are rebalanced on a regular calendar basis, while others will act when investments move outside predetermined ranges. The organization’s investment strategy should define the process.
Is rebalancing the same as market timing?
No. Market timing attempts to predict future market movements. Rebalancing brings the portfolio back toward an allocation the organization has already established.
What is portfolio drift?
Portfolio drift occurs when market performance causes investments to become larger or smaller portions of the portfolio than originally intended.
Can rebalancing help maintain diversification?
Yes. Rebalancing can help prevent one area of the portfolio from growing too large after a period of strong performance, therefore helping maintain the organization’s intended diversification.
Should rebalancing be included in an Investment Policy Statement?
Yes. An Investment Policy Statement can document target allocations, acceptable ranges, monitoring responsibilities, and the process for rebalancing the portfolio.
Continue the Conversation
A strong rebalancing process starts with knowing what your portfolio is designed to accomplish and having a clear framework to keep it aligned over time.
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