Central Banks & Supervisors
The institutions that issue the currency, set the policy rate, lend when nobody else will, and decide what a bank is allowed to hold and how much capital it must hold against it.
The system around it: Sets the rules, runs the plumbing, keeps the score. the whole map
The seats
two of them, each answering the same six questions so that they can be read against each other.
Next to it
The other group on the same side of the price.
What an interview asks here
These questions are checking whether you know that the policy rate applies to almost nothing directly, and that everything else is expectations.
Try each one out loud before you open it. What is underneath is the shape of a complete answer, not a script — somebody who can produce those parts in their own words can also answer the four variations that follow, and somebody who has memorised a paragraph can answer one.
Q1A central bank changes its policy rate. Trace what actually happens.
What it is checking. The transmission question, and it separates people who know the lever from people who know the mechanism.
A complete answer contains:
- The rate applies directly to a small set of overnight balances; almost nothing else re-prices because of it mechanically.
- Markets price a path forward from it, which moves the whole curve and therefore mortgage rates, corporate borrowing and the currency.
- Banks then decide how much of that to pass on, constrained by deposit competition and their own capital.
- So the guidance about where the rate goes next is often the larger instrument, which is why the statement is drafted as carefully as the decision.
Read it properly: Monetary policy · Reading the statement
Q2What is the difference between lending to a solvent bank and rescuing an insolvent one?
What it is checking. The lender-of-last-resort question, and the honest answer includes how hard the judgement is.
A complete answer contains:
- The classical answer is to lend freely against good collateral to institutions that are solvent but cannot fund themselves.
- That draws a line between a liquidity problem and a capital one — which from outside look identical.
- In the moment the information is incomplete and the decision cannot wait, which is why resolution frameworks are written in advance.
- And the standing cost is moral hazard: the willingness to lend in a crisis changes the risks taken before one.
Read it properly: Central banking · Supervision and regulation
Q3Why is a risk weight a judgement rather than a measurement?
What it is checking. The most consequential number in banking regulation, and it is written as if it were a fact.
A complete answer contains:
- It is a rule about how much capital to hold against an exposure, chosen by a policymaker or produced by a model the supervisor approved.
- Two exposures with the same weight are not equally risky; they have been treated the same by a rule.
- Which creates a market in whatever the rule scores lightly — the activity moves to where the weight is low rather than stopping.
- That is not an argument against having them; it is the reason they are reviewed and stress-tested rather than trusted.
Read it properly: Supervision and regulation · Significant risk transfer
Q4What is a stress test actually for?
What it is checking. Whether you think it predicts or constrains.
A complete answer contains:
- It runs a firm's own book through a scenario the supervisor wrote, so the answer is comparable across firms.
- It is not a forecast: the scenario is chosen to be severe rather than likely.
- Its output is a capital requirement and, often, a restriction on distributions — so it binds rather than informs.
- Its weakness is that a scenario nobody finds stressful produces a passing grade and no information.
Read it properly: Supervision and regulation · 2023
Q5Explain why an instrument can do exactly what it was written to do and still surprise the market.
What it is checking. The 2023 additional-tier-one question, and it is about ranking rather than about the instrument.
A complete answer contains:
- Loss-absorbing instruments are written to be written down or converted when a trigger is hit or a resolution begins.
- Holders often price them on the assumption that the usual order of loss will be respected in practice.
- When resolution puts one class of holders ahead of another differently from that assumption, the document was followed and the expectation was not.
- Which is why reading the terms rather than the ranking convention is the whole of the analysis for these instruments.
Read it properly: 2023 · Contingent convertibles
Q6Why does a central bank's balance sheet matter as a policy instrument?
What it is checking. The part that stopped being unconventional and is rarely explained.
A complete answer contains:
- Buying assets removes duration from the market and adds reserves to the banking system, which affects longer rates directly rather than through expectations.
- It also makes the central bank a large holder, so the terms on which it stops holding are themselves a market event.
- The exit is therefore harder than the entry: buying is a decision, ceasing to hold is a shock that has to be signalled.
- And the collateral it will lend against shapes what banks are willing to hold in the first place.
Read it properly: Monetary policy · The yield curve
Q7Prudential and conduct supervision — how do they differ?
What it is checking. Two jobs that use different tools and are often confused into one.
A complete answer contains:
- Prudential asks whether the firm can survive: capital, liquidity, governance, resolvability.
- Conduct asks whether the customer was treated properly: disclosure, suitability, fair pricing, complaints.
- They are separate bodies in many jurisdictions because the skills and the evidence are different.
- And a firm can pass one comfortably while failing the other completely, which is exactly why both exist.
Read it properly: Supervision and regulation · Investor protection
Do these against a clock — one at a time, ninety seconds each, answer before you look.
Whose questions these are. Every question on this page was written for this publication. None is taken from anybody else’s question bank, and none is a claim about what any named firm asks — that is neither verifiable from here nor ours to assert. They are our own reading of which mechanism a question of this kind is testing. Information and education only.
Test yourself: five questions
Five quick questions on this part of the industry — checked entirely on your device, nothing stored or sent. Wrong answers come with explanations, and the seat pages above hold every answer. For education only.