What it means
The alternative arrangement is an advisory account, where the manager recommends and the client decides. Discretion removes that step, so a manager can act quickly on a market move, rebalance a portfolio or exit a position without waiting for a client who may be in a meeting or on a flight.
Authority is granted through a limited power of attorney or a discretionary mandate document, which is where the real protections sit. A well-drafted mandate specifies the objective, the benchmark, permitted asset classes, concentration limits, any prohibited investments and the reporting the client will receive.
Fees usually work differently from a transactional account. Most discretionary managers charge an annual percentage of assets under management, billed quarterly, which reduces the incentive to trade excessively compared with commission-based arrangements.
The main risk is not fraud but drift. Portfolios can quietly move away from the agreed risk profile, so the mandate should set clear ranges, and the client should read the quarterly reporting rather than filing it unopened.
Regulators treat these accounts carefully because of the conflict inherent in trading someone else's money. Managers with discretion typically owe a fiduciary duty, must maintain suitability records, and are subject to rules against churning, which means trading excessively to generate fees or commission.
In practice
Real-world examples
Example 1
A surgeon with no time to monitor markets grants discretion to a manager with a mandate limiting equities to a maximum of 70% of the portfolio. When markets fall sharply, the manager rebalances back into equities within days, something an advisory arrangement would have delayed.
Example 2
A charitable foundation appoints a discretionary manager but writes an exclusion list into the mandate, prohibiting tobacco, gambling and weapons holdings. The manager must trade within those constraints and reports compliance quarterly to the trustees.
Example 3
A company treasurer places $4,000,000 of surplus cash on a discretionary basis with a mandate restricted to government bonds and investment grade paper maturing within two years. The restriction means the manager can act on rate moves without any risk of straying into unsuitable assets.
Think of it
Giving someone a discretionary account is like hiring a private chauffeur. You tell them your destination, budget, and preferred route style, but you let them handle the steering wheel, gears, and traffic choices in real time without asking for your input at every single traffic light.
Formula
Calculation
Annual management fee = Portfolio value x fee rate, and net return = Gross return - fees. A business owner places $850,000 with a discretionary manager charging 1.25% a year on assets under management, billed quarterly. Annual fee = $850,000 x 1.25% = $10,625, which is $10,625 / 4 = $2,656.25 per quarter. Suppose the portfolio returns 7% gross over the year, or $850,000 x 7% = $59,500. Net gain = $59,500 - $10,625 = $48,875, a net return of $48,875 / $850,000 = 5.75%. The fee has absorbed 1.25 percentage points of the 7% gross return, which is exactly why fee levels deserve as much scrutiny as performance figures.Case study
Seen in the real world
Bellhaven Trading Company is a fictional business used to illustrate how discretion can go wrong without a tight mandate. After selling a division, its two owners placed $2,000,000 with a discretionary manager, signing a short mandate that described the objective only as balanced growth with no specific limits.
Over three years the manager built an increasingly concentrated portfolio, with almost 40% in a single technology sector fund because it had performed well. The owners received quarterly statements showing strong returns and did not examine the underlying allocation. When that sector fell 35% in a single quarter, the portfolio dropped far more than a genuinely balanced strategy would have, and the owners discovered they had no contractual basis for complaint because the mandate had set no concentration limit.
Bellhaven renegotiated the arrangement with a proper mandate: a maximum of 15% in any single fund, a maximum of 25% in any one sector, a stated benchmark and a semi-annual review meeting. The illustrative lesson is that discretion delegates the decisions but not the responsibility, and the mandate is the only tool a client has to define the boundaries in advance.
Watch out
Common mistakes
- Signing a vague mandate that states an objective but sets no limits on concentration, asset classes or gearing.
- Assuming discretionary authority allows a manager to withdraw funds, when trading authority and withdrawal authority are separate permissions that should never be combined casually.
- Judging a discretionary manager on gross performance without deducting the annual fee, which can consume a meaningful slice of the return every year.
Questions
People also ask
What is the difference between discretionary and advisory?
In a discretionary account the manager trades without asking, while in an advisory account the manager recommends and the client approves each decision.
Can I override my discretionary manager?
You can normally instruct restrictions, add exclusions or terminate the mandate, but interfering with individual trades defeats the purpose and most managers will ask you to choose one arrangement or the other.
How do I monitor a discretionary account sensibly?
Review performance against the agreed benchmark, check the asset allocation against the mandate limits, and confirm that turnover and fees look reasonable relative to the strategy.