Most investors spend considerable time thinking about which funds to hold, how to allocate across asset classes, and whether to rebalance quarterly or annually. Far fewer spend time thinking about the document that should govern all of those decisions.
That document is called an Investment Policy Statement, or IPS. And in our view, it is the most underused tool in personal investing.
An IPS is not complicated. It is not just for institutional investors or pension funds. It is not a legal document, and it does not require a lawyer to create. It is, at its core, a written set of guidelines that defines how you invest your money, why you invest that way, and what rules you commit to following when the inevitable temptations arise.
Those temptations are the whole point. Markets are volatile. Headlines are alarming. Friends tell you about a stock that is going to double. The portfolio you built carefully over years suddenly looks like it needs to be reconsidered because something has changed and the old approach no longer seems right. In those moments, an IPS is not just a document. It is a decision you made in a calm, rational state, waiting for you to consult before you do something you will regret.
This guide explains what an Investment Policy Statement is, what it contains, why it matters, and how to build one that actually protects your financial plan.
An Investment Policy Statement is a written document that defines the guidelines governing how your investment portfolio is managed. It records your investment goals, your risk tolerance, your asset allocation strategy, your investment philosophy, your liquidity needs, and the rules that will govern rebalancing, withdrawals, and changes to the portfolio over time.
It serves two audiences. First, it serves you. It is a written record of the decisions you made deliberately, in a calm and rational state, before the market started doing something that made those decisions feel wrong. Second, if you work with a financial advisor, it serves as a formal agreement about how your money will be managed, what the advisor can and cannot do without your direction, and what benchmarks and guidelines apply to your portfolio.
The IPS does not tell you exactly what to buy. It tells you how to think about buying, when to revisit, what your constraints are, and what rules govern your behavior as an investor. Think of it as the constitution of your financial life. The specific investments are the legislation. The IPS is the framework within which all of that legislation operates.
The Investment Policy Statement was originally developed for institutional investors: endowments, pension funds, foundations, and sovereign wealth funds that manage capital on behalf of beneficiaries. In that context, an IPS is a governance requirement. It protects the institution from the potentially harmful discretion of any individual manager who might act in ways inconsistent with the beneficiaries' interests.
Individual investors face a different version of the same problem. The harmful discretion they need protection from is their own.
DALBAR's annual behavioral finance research has documented this gap for decades. The average equity fund investor has underperformed the S&P 500 by nearly 3% per year over the past 30 years, not because they chose bad funds, but because they moved in and out of those funds at exactly the wrong times. They sold during downturns and bought during recoveries. They chased recent performance and abandoned strategies that had temporarily underperformed. They let fear and greed drive decisions that should have been governed by a plan.
An IPS directly addresses this problem. It does not eliminate market volatility. It eliminates the excuse to abandon your strategy because of market volatility. When the S&P 500 drops 30% and panic is running high, an investor without an IPS has nothing standing between them and a call to their advisor to move to cash. An investor with an IPS has a document they wrote in a calm moment, reminding them exactly what they decided to do in precisely this scenario.
This is worth more than most people realize. The gap between a sensible investment strategy executed consistently and the same strategy executed inconsistently is enormous over a 20- or 30-year investment horizon. The IPS is what produces consistency.
An IPS can be as simple as a single page or as detailed as a multi-page document covering every contingency. For most individual investors, a focused one-to-two page document covers everything that matters. Here is what a complete IPS should address.
What is this money for, and what do you need it to do? The objective defines the purpose of the portfolio and provides the lens through which every other decision should be made.
Common objectives include:
Your objective is not fixed. It will likely shift over the course of your financial life as circumstances change. But at any given point in time, it should be clearly stated and specific.
How long will this money be invested before you need it? Time horizon is one of the most important inputs into investment strategy, because it determines how much volatility is genuinely tolerable.
An investor with a 30-year time horizon can afford to hold a significant equity allocation, because they have time to recover from market declines. An investor who will need the money in three years cannot, because a 30% decline in year one is simply not recoverable in time.
Important: For retirement investors, the relevant time horizon is not the date of retirement. It is the expected duration of the retirement itself, which for a 65-year-old couple today could easily be 25 to 30 years. The portfolio needs to last longer than most people intuitively assume.
Asset allocation is the most consequential investment decision most people make, yet it is rarely written down explicitly. The IPS should specify your target allocation across the major asset classes: equities (domestic and international), fixed income (short-term and intermediate-term), real assets, and cash.
It should also specify acceptable ranges around each target. For example: 60% equities (acceptable range: 55% to 65%), 35% fixed income (acceptable range: 30% to 40%), 5% cash (acceptable range: 3% to 8%). These ranges define when rebalancing is required and when the portfolio is within acceptable bounds.
For retirees, the equity-bond split is particularly important. Moving too conservatively in early retirement introduces longevity risk: the portfolio does not grow enough to sustain spending over a 25- to 30-year horizon. Maintaining too aggressive an allocation introduces sequence of returns risk: a major market decline early in retirement forces selling assets at depressed prices to fund living expenses, permanently impairing the portfolio's long-term trajectory.
Risk tolerance has two components that are sometimes confused:
Your IPS should reflect both dimensions. If there is a significant gap between the two, that gap needs to be resolved, not ignored. A risk tolerance that is higher than your emotional capacity will produce bad decisions under stress.
This section articulates how you believe markets work and how you will seek to benefit from that belief. It does not have to be elaborate. A simple, clear statement of philosophy is more valuable than a complicated one.
At Arcadia Private Wealth, our investment philosophy is built around four core principles:
How much of your portfolio needs to remain accessible at all times? For retirees, this section should specify how much is held in cash or short-term fixed income to fund living expenses without needing to sell equities during market downturns. A common approach is to maintain one to two years of planned withdrawals in highly liquid, stable assets.
For pre-retirees, liquidity needs typically center on the emergency reserve and any known large expenditures within the next one to three years.
If you are drawing from the portfolio, the IPS should specify how withdrawals will be funded. Which accounts will be drawn from first, second, and third? How will withdrawals be adjusted if the portfolio experiences a significant decline? What is the sustainable withdrawal rate assumption built into the plan?
For retirees, this section connects directly to the retirement income strategy. It prevents ad hoc withdrawal decisions that could undermine the long-term sustainability of the portfolio.
Markets drift. Even a carefully designed allocation will shift over time as different asset classes perform differently. The IPS should specify when rebalancing occurs: time-based (quarterly, annually), threshold-based (when any asset class drifts more than a set percentage from its target), or some combination. Threshold-based rebalancing tends to be more effective, as it ensures rebalancing happens when it is most needed.
Rebalancing also has tax implications in taxable accounts. The IPS should acknowledge these and specify how they are managed, such as using new contributions to rebalance toward underweight positions or directing dividends to underweight asset classes before selling overweight positions.
All of the above is important. But the real value of an IPS is not revealed during calm periods. It is revealed during two specific types of situations.
When markets fall sharply, the instinct to take action, to get out before it gets worse, is nearly universal. It is also nearly always wrong.
An investor with a well-constructed IPS does not have to fight that instinct alone. They can open their document and read the section on risk tolerance, which they wrote in a calm moment, describing exactly how they would respond to a market decline of this magnitude. They can read the rebalancing policy, which tells them not to sell into the decline but to evaluate whether the decline has created an opportunity to rebalance toward underweight equity positions. They can read the investment philosophy, which articulates why staying the course is expected to produce better outcomes than attempting to time the market.
This raises the bar. It makes the decision to abandon the strategy a deliberate, conscious choice rather than a reflexive, emotional reaction.
Every era produces its version of the same story. In the late 1990s, it was internet stocks. In 2017, it was cryptocurrency. In 2021, it was meme stocks and SPACs. In each case, the narrative was compelling, the momentum was real, and the eventual correction was painful for those who had abandoned their investment philosophy to participate.
An IPS that specifies a diversified, low-cost investment philosophy and prohibits concentrated positions in individual sectors or securities provides a structural barrier to this type of error. The dot-com bubble did not just hurt investors who had no diversification discipline. It hurt investors who had diversification discipline in January of 1998 and had abandoned it by January of 2000. The IPS is what makes discipline a policy rather than an intention.
Creating an IPS does not require professional expertise, though it is best done in consultation with your financial advisor if you have one. Here is a practical process:
This is worth stating explicitly, because it is the most common mistake investors make when they have an IPS.
The state of the economy does not warrant a change to your IPS. Market volatility does not warrant a change. A Federal Reserve rate decision does not warrant a change. A geopolitical event does not warrant a change. A friend's investment story does not warrant a change.
Your IPS should only change when your actual financial situation or goals have changed. A change in spending needs, a change in time horizon, a new financial goal, a significant shift in risk capacity: these are legitimate reasons to revisit the document.
If you find yourself wanting to change your IPS in response to market events, that is a signal to consult the document more carefully, not to revise it.
No. A one-page document that clearly addresses your objective, time horizon, target asset allocation, investment philosophy, and rebalancing policy is more valuable than a 20-page document that is too complex to consult under stress. Start simple and add detail only where it genuinely serves a purpose.
Yes. If you work with an advisor, your IPS should be a shared document that governs the advisory relationship. Your advisor should reference it when making recommendations and should flag any proposed actions that are inconsistent with its guidelines.
At minimum, annually. In practice, you should also review it immediately following any major life change: a job change, a retirement date moving closer, a significant inheritance, a divorce, the birth of a grandchild, a major health diagnosis, or any other event that materially affects your financial situation or goals.
Yes. In fact, this is often appropriate. The IPS governing your Traditional IRA may differ from the one governing your taxable brokerage account, because the accounts have different tax treatment, different withdrawal patterns, and different roles in your overall financial plan.
A financial plan is broader. It covers income, spending, savings, insurance, taxes, estate planning, and investments as an integrated whole. An IPS is specifically focused on the investment portfolio. The two documents should be consistent and complementary, with the IPS representing the investment component of the broader financial plan.
An Investment Policy Statement is not bureaucratic paperwork. It is the written record of your most important investment decisions, made in a calm and rational state, designed to protect those decisions from being overridden by fear, greed, or the noise of the financial news cycle.
Every serious investor benefits from having one. Not because it guarantees good outcomes, but because it dramatically improves the odds of staying the course through the conditions that cause most investors to abandon their strategy at exactly the wrong moment.
At Arcadia Private Wealth, we develop an IPS with every client as a foundational element of the financial planning relationship. It is how we ensure that the investment strategy governing your portfolio reflects your actual goals, your actual risk tolerance, and a clear philosophy, not the most recent market narrative.
If you have never seen or created an Investment Policy Statement for your own portfolio, we would be glad to walk through that process with you.

Grant Webster, CFP®, TPCP®
Founder, Wealth Advisor