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// WORKED EXAMPLETHE ARITHMETIC A DECISION RESTS ON

Suitability in Banking: a Worked Example

A product can pay the bank well and still be wrong for the file.

BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED · 7 MIN READ

// THE SHORT ANSWER

Before a bank sells a business a hedge or a fixed rate, the question to answer is whether the product fits what the customer is trying to do and whether the customer can bear it if things go the other way. That is suitability. Whether a statute requires the test depends on the market, the customer and whether the bank gave advice; a company's term loan often sits outside the rules while the swap beside it may sit inside them. For a lender the question is also a credit one, because a product that does not fit the business can become a claim the business cannot meet.

BASIS  Practitioner judgment from sixteen years in commercial banking, set out in How Bankers Think (Highbank Press, 2026). Every borrower on this site is a composite constructed for teaching, not a client. The market is mid-market commercial lending as practised in New Zealand and Australia; where a convention differs elsewhere, the page says so.

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PART OF How Banks Work

// 01 — WHY A LENDER HAS A STAKE IN THE FIT

A poorly fitting product is a conduct problem and, before long, a credit problem. An interest rate swap sold beside a loan is an exposure in its own right. If rates move against the customer and the hedge has to be closed, the amount owed joins the bank's claim on the business. The sale and the credit risk end up in one file.

The UK's experience is the standard warning. In 2012 the then regulator reviewed interest rate hedging products sold to small and medium businesses and found serious failings. They included poor disclosure of exit costs, failure to establish whether customers understood the risk, advice given in sales described as non-advised, over-hedging where the amount or term did not match the loan, and rewards that drove those practices.

// 02 — HOW THE TEST IS WRITTEN, MARKET BY MARKET

Need what risk is the customer trying to remove?
Fit do the amount and the term match the thing hedged?
Capacity can it carry the cost if the market goes the other way?
Understanding does it know what leaving will cost?

Those four questions are the common ground; the law differs on who is owed them. In New Zealand the fair conduct principle, which includes ensuring products are likely to meet the requirements and objectives of likely consumers, applies to consumers: a debtor under a consumer credit contract, or a retail client of other financial services. A hedge for a business that is not a wholesale client can fall within it, while a company's term loan generally does not. Financial advice to a retail client must also be suitable under the Code of Professional Conduct.

In Australia, the 'not unsuitable' test in responsible lending applies to consumer credit, broadly for personal, domestic or household purposes or residential investment property, and loans to companies are not regulated by it. Derivatives are different: a company or trust can be a retail client, for example where its business is small (fewer than 20 people, or 100 in manufacturing), which can bring design and distribution rules and, if personal advice is given, the best-interests and appropriate-advice duties. In the UK, conduct rules set a suitability test for personal recommendations and a narrower appropriateness test for some non-advised sales. The Consumer Duty follows the existing sourcebooks rather than covering all small businesses: regulated credit and investment business with a client who is not a professional client are inside it, while most lending to companies is not. The older principles on customers' interests and communications continue to apply elsewhere.

// 03 — THE EXAMPLE

A bedding manufacturer, constructed for this page like every figure in it, borrows US$8m on a floating rate for five years, repaying US$1m a year. Its EBITDA is US$1.9m. At the last review the owner told the bank that it plans to sell a surplus factory at the end of year two and use US$4m of the proceeds to reduce the loan. The bank offers a five-year swap fixing the rate on a flat US$8m. The credit charge built into the swap, 0.25% a year on the notional amount, is this example's.

Start of year 1 2 3 4 5
Loan balance (US$m) 8.0 7.0 2.0 1.0 0.0
Flat swap notional 8.0 8.0 8.0 8.0 8.0
Hedge above the loan 0.0 1.0 6.0 7.0 8.0
Bank's credit charge, flat: (8.0 × 5) = 40.0 × 0.25% = US$100,000
Bank's credit charge, matched: 8 + 7 + 2 + 1 = 18.0 × 0.25% = US$45,000
Excess hedge, years 3–5: 6 + 7 + 8 = 21 (US$m notional-years)
If rates fall 1.5 points: 21 × 1.5% = US$315,000 before discounting

The flat swap earns the bank US$55,000 more than a hedge shaped to the loan, and it hedges a debt that the bank already knows will shrink. If floating rates fall 1.5 points after the factory sale, the business pays about US$315,000 over three years on borrowings it no longer has, or one-sixth of a year's EBITDA. A hedge whose notional follows the repayment schedule and the planned sale, explained with its break cost, would have met the need.

The later moment matters as well. At the end of year two the factory is sold and the loan is cut to US$2m. The swap still runs at US$8m. The bank learns of the repayment because it receives the money, and the customer has not mentioned the hedge. The fair thing is to raise it then: the position has changed and the product no longer fits. Waiting for the next annual review means the customer may first hear of the mismatch from a loss.

// 04 — HOW IT DIFFERS FROM APPROPRIATENESS

The UK's two tests show the distinction clearly. Suitability, used for recommendations, looks at the client's objectives, financial situation, and knowledge and experience. Appropriateness, used for certain non-advised sales, asks a narrower question: whether the client has the knowledge and experience to understand the risks.

Affordability is a different question again. A credit assessment asks whether the customer can pay and whether the bank will be repaid. Suitability looks from the customer's side and asks whether this is the right thing to be paying for. The bedding maker could meet the payments on its swap in the first two years. It still should not have been sold a hedge larger and longer than its debt.

DEFINED IN ONE PARAGRAPH → · THE HEDGE RATIO → · A SWAP, FROM THE BORROWER'S SIDE →

// 05 — WHERE IT DECIDES A FILE

It decides what has to be written down. A file that shows the customer's stated objective, the alternatives considered, what the break cost could be and why the amount was chosen can defend a sale years later. A file that shows only the signed confirmation cannot, and the UK review noted poor record-keeping among its findings. It also decides how a banker reads an incentive. Where one product pays the bank more, the conflict of interest needs to be dealt with openly, and the reason for the recommendation recorded.

Then comes the life of the product. Not every statute imposes a continuing duty, and some tests are applied only at the point of sale. New Zealand's fair conduct principle applies across dealings with a consumer. In practice a bank's review events are the natural trigger: an early repayment, a sale of assets, a refinancing or a covenant reset all change what a hedge is doing, and the conversation about it belongs at that moment.

HEDGING POLICY → · A ONE-MINUTE FILE ON IT →

// SOURCES

The documents the statements on this page rest on. Each was opened and checked when cited.

  1. Financial Services Authority (UK), Interest rate hedging products: information about our work and findings, 2012 — Records the review's findings on exit costs, understanding of risk, non-advised sales, over-hedging, incentives and record-keeping — sections 01 and 05.
  2. Financial Conduct Authority (UK), FG22/5 Final non-Handbook Guidance for firms on the Consumer Duty, July 2022 — paragraphs 2.3, 2.4 and 2.11 — States that the Duty follows each sectoral sourcebook, including regulated credit and investment business with non-professional clients, excludes commercial lending in the mortgage sector, applies to SMEs only as existing sourcebooks do, and that Principles 6 and 7 continue elsewhere — section 02.
  3. Australian Securities and Investments Commission, Regulatory Guide 209 Credit licensing: Responsible lending conduct — RG 209.32 and RG 209.36 — Confirms that loans to companies, and loans wholly or predominantly for business purposes, are outside the responsible lending obligations — section 02.

// QUESTIONS PEOPLE ASK

What is the difference between suitability and appropriateness?
Suitability is the wider test and applies, in UK conduct rules, when a firm makes a personal recommendation. It looks at the client's objectives, financial situation, and knowledge and experience. Appropriateness applies to certain sales without advice and asks only whether the client has the knowledge and experience to understand the risks. A firm that has assessed suitability for a transaction does not generally need to assess appropriateness for it as well.
Does suitability apply to business loans?
Often not as a statutory test. Australia's responsible lending rules do not cover loans to companies, and New Zealand's fair conduct regime covers credit only under consumer credit contracts. The UK's Consumer Duty generally does not reach lending to companies, though regulated credit to a sole trader or small partnership can be inside it. A hedge or other derivative sold beside the loan is a different matter, and a small business can be a retail client for it. Where no statute applies, the bank's own standards and its credit interest still favour a product that fits.
What does a suitability assessment ask?
It asks what the customer is trying to achieve, what its financial position and exposure are, and how well it understands the product. For a business hedge, that means the size and term of the underlying debt, plans that might change either, how much cash could be called on if rates move against it, and whether the customer has seen an estimate of what early exit could cost. The answers, and the reasoning that follows from them, should be on the file.
Can a business claim for a mis-sold interest rate swap?
It depends on the market, the customer's classification, what was said and what the contract says. In the UK, a regulator-agreed review after 2012 gave redress to customers it classed as non-sophisticated. Elsewhere, a claim may rest on misleading conduct, negligent advice or a dispute scheme open to small businesses. Disclaimers and non-reliance clauses often matter, and the record of what the bank knew at the time matters most. A business with a live concern should take its own legal advice.

// NEXT TO IT

// ON WHOSE DESK

The seats that read this term in an ordinary week. Each page says what the seat is for, who arrives in it, and the shape of the round it runs.

  • Compliance officerTranslates the rules the bank operates under into things the business can actually do, and checks that it does them.
  • Internal auditorThe third line: checks independently that the first two did what they said they did, and reports to the board when they did not.
  • Financial crime analystDetects and investigates money laundering, sanctions breaches and fraud moving through the bank.

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