An investment mandate sets a manager’s authority, objectives and limits. Follow a dated issuer-cap and cash-floor check and distinguish a mandate from an IPS.
Investment mandate
An investment mandate defines the authority given to an investment manager and the objectives and limits governing how a specified pool of assets may be managed. A promising trade can be outside the mandate: an attractive return forecast does not grant permission to buy a prohibited instrument or exceed a concentration limit.
For a quant team, the mandate determines which proposed portfolio weights are admissible before forecasts are turned into orders.
From permission to a testable rule
A useful mandate answers several different questions:
Question
What must be specified
Who may decide?
The account or sleeve covered, the manager's discretion, and who approves changes or exceptions.
What may be held?
Eligible markets and instruments; restrictions on short sales, derivatives, borrowing or particular issuers.
How much risk may be taken?
Position, sector, liquidity and other limits, with an explicit measurement basis.
What is success?
Investment objectives, horizon and an appropriate performance comparison, often a benchmark.
How is it supervised?
Valuation and monitoring times, reporting duties and the procedure when a limit is breached.
A benchmark is an evaluation reference; a position limit is a restriction. Beating the benchmark does not cancel a limit breach. Likewise, a return objective is an aim rather than a guaranteed outcome. CFA Institute's suitability standard requires its members and candidates managing to a specific mandate to keep investment actions consistent with that portfolio's objectives and constraints.
Documentation and legal obligations depend on the arrangement and jurisdiction. As a concrete UK example, FCA COBS 6.1.6 specifies relevant disclosures for firms within that section's scope, including permitted investments and transaction limits, discretionary management objectives, risk and performance comparisons. It is not a universal mandate template.
A dated pre-trade check
Consider a fictional USD account valued on 26 October 2026. Its mandate permits long-only listed equities and USD cash, prohibits borrowing and derivatives, caps aggregate holdings of any one equity issuer at 10% of NAV, and requires cash of at least 5% of NAV. These are illustrative contractual choices, not regulatory limits.
For this example, the mandate requires a check of the proposed post-trade portfolio at current marks before releasing orders, followed by checks at each daily closing valuation. Issuer exposure aggregates all share classes of that issuer. Cash means the USD cash balance after accounting for the proposed trades. Assume immediate settlement at the valuation marks, no costs, no liabilities and no external flows, so the proposed portfolio's net asset value is USD 1,000,000.
Test
Proposed holding
Calculation using dated NAV
Result
Issuer A maximum
USD 120,000
120,000 / 1,000,000 = 12%
Fails the 10% cap
Cash minimum
USD 60,000
60,000 / 1,000,000 = 6%
Passes the 5% floor
The issuer cap allows USD 100,000. The proposed issuer holding exceeds it by USD 20,000, or 2 percentage points of NAV. The cash floor requires USD 50,000, leaving USD 10,000 of cash headroom. Equality passes both inclusive rules. The denominator is the whole account's NAV, not the equity sleeve or the issuer's market capitalisation.
Synthetic proposed portfolio valued on 26 October 2026 has USD 1,000,000 NAV. Issuer A at 12% fails a 10% maximum by USD 20,000; cash at 6% passes a 5% minimum with USD 10,000 headroom.
Original synthetic check, in USD. Bars share a percentage-of-NAV scale. Dashed marks show the separate contractual maximum and minimum.
The cash pass does not make this proposal admissible. Reduce the proposed issuer holding or obtain a valid change through the mandate's approval process before trading. Passing these two tests alone would still leave every other mandate requirement to check.
The date matters. Prices, cash flows and NAV change, so yesterday's passing weights need not pass today. The actual mandate should distinguish a breach caused by an order from one caused by market movement and specify notification and remediation procedures. An automated control needs those instructions; it should not silently invent an exception or assume that every breach requires an immediate sale.
Mandate versus investment policy statement
An investment policy statement (IPS) describes the investor's broader objectives, constraints and governance of the investment programme. A manager's mandate can implement part of that policy for a particular sleeve. An institution might have one overall asset-allocation policy but separate equity and bond managers, each with different permissions and benchmarks. The documents can overlap or incorporate one another; the distinction is their function, not a mandatory naming convention. CFA Institute's institutional IPS guide discusses both overall governance and manager-specific contractual investment guidelines.
For the quantitative consequences, Portfolio Constraints explains how long-only and sector restrictions change the weights a model can express. The full lesson requires membership; a public preview is available. The mandate supplies the permissions and limits that such an optimisation must respect.
Qian, E. E., Hua, R. H. and Sorensen, E. H. Quantitative Equity Portfolio Management: Modern Techniques and Applications. Chapman & Hall/CRC, 2007, Chapter 11, pp. 357–359: holding constraints and long-only restrictions. The account and limits above are original illustrative assumptions.
