What it means
Imagine a pool of loans, such as car loans or business loans, bundled together and sold to investors as securities. Instead of selling one identical share of the pool, the issuer splits it into layers.
Cash coming in from borrowers is paid out to the layers in a set order, and losses are absorbed in the opposite order. The top layer is usually called the senior tranche.
It is paid first, carries the lowest risk and offers the lowest interest rate. Below it sit mezzanine tranches with more risk and higher returns, and at the bottom is the equity or first-loss tranche, which takes the first losses and offers the highest potential return.
This structure is called a waterfall because cash flows down from one tranche to the next, and each tranche is only paid after those above it are satisfied. Credit rating agencies rate each tranche separately, so a pool of mixed-quality loans can produce slices rated from the highest grades down to unrated.
The ability to tailor risk is the main attraction. Tranches are not confined to securitisation.
A loan from a bank may be paid out in tranches, each released when the borrower meets agreed milestones, such as completing a stage of construction. Investment rounds for start-ups are sometimes released in tranches linked to performance targets, and some share issues are made in tranches over time.
The 2008 financial crisis showed the risks. Complex structures made it hard for investors to see how much risk they held, and losses in the underlying loans hit tranches that had been rated very safe.
Today, regulators require clearer disclosure and many issuers must retain part of the risk. For a finance reader, the key questions are where a tranche sits in the waterfall, how much protection lies beneath it and how much loss the pool could suffer before it is affected.
That protection below a tranche is called credit enhancement or subordination.
In practice
Real-world examples.
Example
A bank bundles $500,000,000 of small business loans and sells them in three tranches. A pension fund buys the senior tranche for its stability, while a specialist fund buys the equity tranche for the higher return. Each investor takes the risk that suits its mandate.
Example
A property developer agrees a construction loan of $30,000,000 with a lender, paid out in four tranches. Each tranche is released after an independent surveyor confirms that the work has reached the next stage. The lender limits its risk if the project stalls.
Example
A start-up secures a $6,000,000 investment from a venture fund, paid in two tranches of $3,000,000. The second tranche is released only after the company reaches an agreed revenue target. The founders accept the condition in return for a higher valuation.
Formula
Calculation
Loss absorbed by a tranche = lesser of (remaining pool loss, tranche size), with losses allocated from the bottom tranche upward
Suppose a $100,000,000 pool is split into a senior tranche of $70,000,000, a mezzanine tranche of $20,000,000 and an equity tranche of $10,000,000. The pool suffers $12,000,000 of credit losses. The equity tranche absorbs the first $10,000,000, leaving $2,000,000, which the mezzanine tranche absorbs. The senior tranche absorbs 0, so it is fully repaid, while the mezzanine tranche has lost 2,000,000 / 20,000,000 = 10% of its value.Case study
Seen in the real world.
Marigold Auto Finance is a fictional lender used to illustrate how tranches work. It packaged $200,000,000 of car loans into a security with a $150,000,000 senior tranche, a $35,000,000 mezzanine tranche and a $15,000,000 equity tranche. The company kept the equity tranche to show confidence in the loans.
A downturn raised defaults and pool losses reached $20,000,000. In this illustrative story, the equity tranche was wiped out and the mezzanine tranche lost about $5,000,000, but the senior tranche was repaid in full. The lesson is that the order of payment, not just the quality of the pool, determines who bears the loss.
Watch out
Common mistakes.
- Assuming all tranches share losses equally. Losses hit the lowest tranche first, and the senior tranche is affected only after the layers below are exhausted.
- Believing a high rating means no risk. Ratings reflect probabilities and assumptions, which can fail under stress.
- Thinking tranches only exist in securitisation. Loans, investments and share issues can all be released in tranches.
Questions
People also ask.
What does senior tranche mean?
It is the layer with the first claim on cash flows and the lowest risk, usually offering the lowest return.
What is the equity tranche?
It is the bottom layer that absorbs the first losses and receives any excess profit, so it is the riskiest and the highest-yielding.
Why would a company issue in tranches?
Splitting the pool lets it appeal to different investors and can reduce overall funding costs.
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