Portfolio Management Pathway · Case Study in Portfolio Management: Institutional (Endowment)

How to Write an Endowment Investment Policy Statement

Updated 9 October 2026 · Fact-checked

An endowment IPS is a written policy that sets the fund's return objective, risk tolerance, constraints and spending rule. You build it by stating the required return (spending plus inflation plus costs), judging ability and willingness to take risk, then listing liquidity, time horizon, legal and unique needs, and governance.

Understand Endowment Investment Policy Statement (IPS)

An endowment is a pool of assets given to an institution, such as a university, hospital or foundation, to support its mission. Most endowments aim to last forever. That makes them long-lived investors who must pay out money every year while keeping the real value of the fund for future beneficiaries.

The investment policy statement (IPS) is the written document that guides all investment decisions. It does not pick securities. It states what the fund needs to achieve and what limits apply. A good IPS lets a new committee member read it and understand why the portfolio looks the way it does.

The core idea is intergenerational equity: today's beneficiaries and future beneficiaries should be treated fairly. If the fund pays out too much, the real value falls and future beneficiaries lose. If it pays out too little, today's beneficiaries lose. The spending policy is the tool that balances the two.

The IPS has the usual two parts. Objectives are return and risk. Constraints are liquidity, time horizon, tax, legal and regulatory, and unique circumstances. For an endowment, the unique circumstances often include the institution's dependence on the fund for its operating budget, ethical or mission-based investing rules, and the governance structure. The IPS should also name who decides what, how often it is reviewed, and how performance is judged.

In the exam you are given a case with facts on spending, inflation, costs, the budget and the board. Your job is to turn those facts into IPS statements and to justify each one briefly.

Key rules to remember

Required (nominal) return, geometric form: Required return = (1 + spending rate) × (1 + inflation) × (1 + cost rate) − 1; Spending rate is the payout ÷ assets. Cost rate covers management and administrative expenses. This form compounds the three components. It is one convention, not a universal rule. Many cases accept the simple sum below. Follow the definition the case gives, and state which form you used.
Required return, approximate form: Required return ≈ spending rate + inflation + cost rate; Quick sum. It is often accepted, and you should use it when the question allows an approximation or the numbers are small. State which form you used.
Real return objective: Real return objective = (1 + required nominal return) ÷ (1 + inflation) − 1; This is the return needed to preserve purchasing power while funding spending and costs. It follows the geometric convention, so if the case defines the objective as spending plus costs, use that definition. Use the inflation that applies to the institution, such as a higher education cost index, if given.
Simple spending rule: Spending = spending rate × beginning market value; Easy to apply and linked to the market, but spending is volatile when markets move.
Smoothed spending (rolling average) rule: Spending = spending rate × average market value of the last N years; Smooths spending and budget shocks, but lags the market. Spending can stay high after a fall.
Hybrid (Yale-type) spending rule, one common version: Spending = weight × prior-year spending × (1 + inflation) + (1 − weight) × spending rate × prior-year market value; This is one common version. Cases may define the rule differently, for example with a different inflation measure or market value date, so use the definition given in the case. The weight on prior spending sets how smooth the payout is: a higher weight gives steadier spending, a lower weight ties spending more closely to the market.

How to solve Endowment Investment Policy Statement (IPS) questions

Use this order for any endowment IPS question. It keeps your answer tied to the facts in the case.

1Read the case and mark the facts: spending needs, inflation, costs, budget dependence, time horizon, legal rules and governance.
2Set the return objective. Add spending rate, inflation and costs, using the geometric form if numbers are given. Say whether it is a real or nominal return.
3Assess risk tolerance in two parts. Ability: horizon, budget reliance, size of the fund relative to the budget, and spending flexibility. Willingness: board attitudes, mission and views on losses. Then state the overall tolerance as the lower of the two where they conflict.
4List the constraints one by one: liquidity (payouts, capital calls, unfunded commitments), horizon (often perpetual, so long), legal and regulatory (for example prudent investor rules and donor restrictions), and unique needs (mission-based limits, board capacity).
5Link spending policy to the objectives. Choose or critique the rule and say how it affects budget stability and real value.
6State governance: who sets policy, who implements it, rebalancing and review frequency, and how performance is measured against a benchmark.
7Write each point with a short reason from the case. Match your answer to the command word and the number of points asked for.

Quickest way: Return, Risk, then LTLU plus Spending

When to use it: Use when you have little time and the question asks for a single IPS element or a short list.

Underline numbers first and compute the required return before anything else.
Write the risk line as 'ability: high or low because ...; willingness: high or low because ...; overall: ...'.
List liquidity, time horizon, legal and unique needs in a line each, one reason each.
Add one sentence on spending rule and one on governance if asked.
Show the calculation and the number clearly so a correct figure earns credit.

Common mistakes in Endowment Investment Policy Statement (IPS)

Adding spending and inflation but leaving out investment costs.
Students remember 'spending plus inflation' as the formula and skip the expense detail in the case.
Fix: Always scan the case for management or administrative costs and include them in the required return.
Stating an overall risk tolerance without separating ability and willingness.
Students give a single general view such as 'high risk tolerance' to save time.
Fix: Give both parts with a reason each, then state the overall tolerance. If they conflict, the lower one governs.
Calling the time horizon short because annual payouts are due.
Students confuse the payout schedule with the life of the fund.
Fix: For a perpetual endowment, the horizon is long. Treat the annual payout as a liquidity need, not a short horizon.
Treating all unique needs as generic.
Students write 'none' or repeat the other constraints.
Fix: Look for mission-based investing rules, donor restrictions, governance limits and reliance on the fund for the operating budget. Quote the case.
Mixing real and nominal returns.
The case gives inflation and a nominal target, and students compare them directly.
Fix: Label each return as real or nominal. Convert using (1 + nominal) ÷ (1 + inflation) − 1.
Giving a recommendation without a justification.
Students think naming the answer is enough.
Fix: Add a short reason tied to a fact in the case, for example 'because the budget depends on the fund for a large share of income'.

Worked examples

Example 1

A university endowment spends 4.0% of assets each year. Expected inflation is 3.0% and annual investment costs are 0.5% of assets. Calculate the required nominal return using the geometric form, and the real return objective implied by it.

Show the solution

Required nominal return = (1.04) × (1.03) × (1.005) − 1.
1.04 × 1.03 = 1.0712.
1.0712 × 1.005 = 1.076556.
Required nominal return = 1.076556 − 1 = 0.076556, or 7.66%.
Real return = 1.076556 ÷ 1.03 − 1 = 1.04520 − 1, about 4.52%.

Answer: Required nominal return is about 7.66%. The real return objective is about 4.52%, which is spending plus costs compounded (1.04 × 1.005 − 1 = 4.52%).

Example 2

A foundation's endowment provides 60% of the annual operating budget. The board is comfortable with market swings and wants to maximise growth. The fund has a perpetual life, holds many private fund commitments with unfunded capital calls, and must follow donor restrictions on tobacco investments. State the fund's risk tolerance and key constraints.

Show the solution

Ability: the perpetual horizon raises ability. However, 60% reliance on the fund for the budget lowers ability, because a large fall would hurt operations. The long horizon offsets part of the budget reliance, so ability is moderate.
Willingness: the board is comfortable with swings and wants growth, so willingness is high.
Overall: ability (moderate) is lower than willingness (high), so the lower governs. Risk tolerance is moderate, not high.
Liquidity: annual spending payouts plus unfunded capital calls require a reserve of liquid assets.
Time horizon: long, since the fund is perpetual. Payouts are a liquidity need, not a short horizon.
Legal and unique: donor restriction on tobacco is a binding exclusion. Heavy budget reliance is a unique need that favours a stable spending rule.

Answer: Risk tolerance is moderate: willingness is high, but ability is only moderate because of 60% budget reliance, so the lower governs. Constraints: liquidity for spending and capital calls, a long horizon, the tobacco exclusion as a legal or donor restriction, and budget dependence as a unique need.

Exam tips

Show the required return calculation line by line, and type the final number clearly. A correct number on its own earns full credit, so avoid rounding too early.
Read the command word. 'Determine' needs the answer, 'justify' needs a reason from the case, and 'state' needs only the statement. Do not write more than asked.
Give only the number of responses requested, in the order asked. Extra responses may not be evaluated.
Split risk tolerance into ability and willingness every time, and name the overall result.
Quote a case fact in each justification. A fact-linked reason earns more than a general statement.

Endowment Investment Policy Statement (IPS) in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Endowment Investment Policy Statement (IPS): frequently asked questions

What does an endowment IPS include?

It includes the return objective, risk tolerance, and the constraints of liquidity, time horizon, legal and regulatory, and unique needs. It also covers the spending policy, governance, rebalancing and review. Each part should follow from the institution's mission and facts.

How do I calculate the return objective for an endowment?

Combine the spending rate, inflation and investment costs. The geometric form is (1 + spending) × (1 + inflation) × (1 + costs) − 1, and the simple sum is an approximation. State whether your answer is real or nominal.

Is the time horizon of an endowment short because it pays out every year?

No. Most endowments are perpetual, so the horizon is long. The yearly payout is treated as a liquidity requirement.

Which spending rule should an endowment choose?

It depends on the case. A simple rule links spending to the market but is volatile, a rolling average smooths spending but lags, and a hybrid blends the two. If the budget depends heavily on the fund, a smoother rule usually fits better.