Mental Accounting

Fenwick Oyelaran keeps three accounts with his adviser and insists on treating them separately: a vacation fund he refuses to expose to any volatility, a college account he calls untouchable, and a play account in which he is comfortable holding two speculative stocks at 40% of that account. He resists any discussion of his combined asset allocation. Which behavioral tendency is he displaying, and what is the practical risk?

1. A.Overconfidence - he overestimates his ability to pick the speculative stocks in the play accountHe may well be overconfident about those two holdings, but that is not what the question describes. The pattern in the stem is applying different risk rules across separate buckets.
2. B.Loss aversion - he feels losses roughly twice as intensely as equivalent gains, which is why he refuses to sell losing positionsLoss aversion is a real and well-documented bias, but the stem shows no reluctance to realize losses. The behavior described is compartmentalization, not an asymmetric reaction to loss.
3. C.Mental accounting - the household overall allocation is never evaluated, so total risk exposure can differ sharply from what he believes he holdsCorrect. Segregating money into buckets with different rules and declining to aggregate is the defining pattern, and the unexamined total allocation is the real cost.
4. D.Anchoring - he fixes on the original amounts deposited into each account and judges everything against themAnchoring means clinging to an arbitrary reference figure such as a purchase price. Nothing in the stem indicates he is measuring anything against a fixed number.

Why: Mental accounting is the tendency to place money in separate mental buckets and to apply different risk rules to each, rather than evaluating wealth as a single portfolio. The practical risk is that the household overall allocation is never examined, so the total exposure to any one risk can be far higher or lower than intended, and offsetting positions across accounts go unnoticed.

A client keeps a certificate of deposit he calls his safe money and a brokerage account he calls his play money, and refuses to consider the two together. Shown that the combined position is far more conservative than the allocation he says he wants, he still will not move funds between them. This behaviour best illustrates

1. A.mental accounting.Correct. Treating identical dollars as non-fungible according to which account holds them is the defining feature.
2. B.loss aversion.Wrong. He is not avoiding the realisation of a loss; he objects to aggregating the accounts at all.
3. C.anchoring.Wrong. No reference price or figure is fixing his thinking in place.
4. D.confirmation bias.Wrong. He has already seen the contrary analysis and is not filtering the evidence he receives.

Why: Mental accounting is the tendency to assign money to separate psychological buckets and evaluate each in isolation, as though dollars in one were a different substance from dollars in another. The cost is a portfolio that is never optimised as a whole, because gains in one bucket are not allowed to offset the shortfall in another and risk is measured bucket by bucket. Here the client has been shown the aggregate and still refuses to combine them, which rules out simple ignorance of the total. An adviser addresses it by reframing the buckets as one balance sheet serving one set of goals.

Fitzwilliam, a cautious investor whose 300,000 dollar portfolio is conservatively allocated, receives a 50,000 dollar inheritance. He tells his representative he wants to put the whole inheritance into speculative small cap funds because, in his words, it is found money he never counted on. The representative should:

1. A.accept the reasoning, since money the customer never expected to have carries no real risk of loss.Unexpected money can be lost exactly like any other money.
2. B.decline to discuss the inheritance at all, since inherited assets fall outside the customer investment profile.Inherited assets are part of his net worth and belong in the profile.
3. C.explain that the source of the money does not change its risk, and evaluate the proposal against his overall portfolio and profile.Correct. Mental accounting is a bias to be surfaced, not a suitability input.
4. D.treat the inheritance as a separate account with its own aggressive profile and document it that way.Splitting the paperwork does not split the risk; the customer wealth and goals remain one picture.

Why: Treating one pot of money as different in kind from another, when both belong to the same investor with the same goals, is mental accounting. Money is fungible: the inheritance is 50,000 dollars of Fitzwilliam wealth and belongs in the same plan as the rest. The representative should point out that a speculative allocation raises the risk of the whole portfolio by a sixth, and evaluate the recommendation against his actual profile rather than against the label he has attached to the source of the funds.

A client agrees that his all-cash portfolio is far too conservative for a thirty-year goal, but for two years he has declined to authorise any change, saying he would rather do nothing than pick the wrong moment to invest. This behaviour best illustrates

1. A.overconfidence.Wrong. He is doubting his own judgement rather than overrating it.
2. B.regret aversion.Correct. He has named the fear of a badly timed decision as the reason for doing nothing at all.
3. C.mental accounting.Wrong. A single undivided portfolio is at issue, with no separate buckets in play.
4. D.hindsight bias.Wrong. He claims no ability to have foreseen any past market movement.

Why: Regret aversion is the preference for inaction over action because an error of commission feels worse than an error of omission, even where the omission is more costly. The client is not disagreeing with the analysis, which is what distinguishes this from a genuine difference of view about the allocation; he simply cannot bear to be the person who invested on the wrong day. Two years of purchasing power foregone is the real loss, and it is invisible to him because nobody made a decision that caused it. Structured approaches such as investing on a fixed schedule work because they remove the moment of choice.