# Understanding Tranches: Definition, Examples, and Investment Strategies

## What Are Tranches?

Tranches slice financial products, like bonds or mortgages, into segments differentiated by risk or maturity, making them appealing to diverse investors with varying appetites for risk and return.  

### Key Takeaways

*   Tranches are slices of pooled securities, such as bonds or mortgages, divided by risk and characteristics, to attract varied investors.
*   Investors can choose tranches based on their desired risk level and potential return, with senior tranches being safer but less rewarding than junior ones.
*   Tranches are common in mortgage-backed securities and can include varying time maturities and yields to fit investor needs.
*   Mislabeling of tranche risks by credit agencies contributed to the 2007-2009 financial crisis by exposing investors to unexpected risks.
*   Tranches, while valuable for customization, can increase investment complexity and pose challenges to uninformed investors.

![Tranches](https://www.investopedia.com/thmb/oynjze1exTogHWk7o8tfJmBCDaA=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/tranches.asp-final-912593623abd4abea1ec1016daee0f37.jpg)

*— Investopedia / Jake Shi*

## How Tranches Work in Structured Finance 

Tranches in structured finance emerged with securitization, which divides risky products with steady cash flows to sell to investors. Discrete tranches within a larger asset pool are documented and assigned different classes of notes, each with a distinct bond credit rating.

Senior tranches generally hold assets with higher credit ratings and have first claim on assets, being repaid first in case of default. Junior tranches have lower or no priority.  

Examples of financial products that can be divided into tranches include bonds, loans, insurance policies, mortgages, and other debts.

## The Role of Tranches in Mortgage-Backed Securities (MBS)

A tranche is a typical structure for secured debt products, like [collateralized debt obligations (CDOs)](https://www.investopedia.com/terms/c/cdo.asp), combining assets like mortgages, bonds, and loans.

An MBS consists of several mortgage pools with loans ranging from safe, low-interest ones to riskier, high-interest ones. Each specific mortgage pool has its own time to maturity, which factors into the risk and reward benefits. Therefore, tranches are made to divide up the different mortgage profiles into slices that have financial terms suitable for specific investors.

For instance, a [collateralized mortgage obligation (CMO)](https://www.investopedia.com/terms/c/cmo.asp) might include tranches with maturities of 1, 2, 5, and 20 years, each with different yields. If an investor wants to buy an MBS, they can choose the tranche type most applicable to their appetite for return and aversion to risk.

A [Z tranche](https://www.investopedia.com/terms/z/ztranche.asp) is the lowest-ranked tranche of a CMO in terms of seniority. Its owners are not entitled to any coupon payments, receiving no cash flow from [underlying](https://www.investopedia.com/terms/u/underlying.asp) [mortgages](https://www.investopedia.com/terms/m/mortgage.asp) until the more senior tranches are retired or paid off.

Investors receive monthly cash flow based on the MBS tranche in which they invested. They can either try to sell it and make a quick profit or hold onto it and realize small but long-term gains in the form of interest payments. These monthly payments are bits and pieces of all the interest payments made by homeowners whose mortgage is included in a specific MBS.

## Crafting Investment Strategies With Tranches

Those seeking long-term, steady cash flow invest in longer-maturity tranches, while those wanting immediate, higher income choose shorter-maturity tranches.

All tranches, regardless of interest and maturity, allow investors to customize investment strategies to their specific needs. Conversely, tranches help banks and other financial institutions attract investors across many different profile types.

Tranches increase debt investing complexity, posing risks to uninformed investors who might choose unsuitable tranches.

Tranches can be misrated by credit agencies, leading investors to riskier assets than intended, a factor in the 2007 mortgage meltdown.

Tranches with junk bonds or sub-prime mortgages were rated AAA through incompetence or alleged corruption, leading to misrepresentation.

## Legal Challenges During the 2007-2009 Financial Crisis: Tranche Lawsuits  

Following the financial crisis, a surge of lawsuits targeted CMO, CDO issuers, and investors, labeled "tranche warfare" by the press.

An April 2008 story in the _Financial Times_ noted that investors in the senior tranches of failed CDOs were taking advantage of their priority status to seize control of assets and cut off payments to other debt holders. CDO trustees, such as Deutsche Bank and Wells Fargo, filed suits to ensure all tranche investors continued to receive funds.

And in 2009, the manager of Greenwich, Conn.-based hedge fund Carrington Investment Partners [filed a lawsuit](https://www.housingwire.com/articles/tranche-warfare-mbs-investor-sues-american-home-over-reo-sales) against the mortgage-servicing company American Home Mortgage Servicing. The hedge fund held junior tranches of mortgage-backed securities that contained loans made on foreclosed properties that American Home was selling for (allegedly) low prices—thus crippling the tranche's yield. Carrington argued in the complaint that its interests as a junior tranche-holder were in line with those of the senior tranche-holders.

## What Are the Three Types of Tranches?

Pooled financial securities are generally broken into three tranches: senior, mezzanine, and junior. Each tranche has a different level of risk and, therefore, a different level of return. Senior tranches have the least risk and the lowest returns while junior tranches have the highest risk and the highest returns. Mezzanine tranches sit between the two.

## What Is an Example of a Tranche?

An example of a tranche is as follows. Hundreds of mortgages are pooled into a security: a mortgage-backed security (MBS). The mortgages in this security all have different credit profiles based on the holder of the mortgage. Some have excellent credit profiles and the mortgages, therefore, have low interest rates.

Some of the borrowers have bad credit profiles and their mortgages have high interest rates. These different mortgages are broken down into tranches. Each tranche represents a different credit profile. The low-risk mortgages go into the senior tranche whereas the high-risk mortgages go into the junior tranche. An investor can choose which tranche they would like to invest in based on their risk profile.

## Is a CMO a CDO?

A collateralized mortgage obligation (CMO) is a collateralized debt obligation (CDO) constructed of underlying mortgages. CDOs are a pooled investment security of any fixed-income asset but are most often made up of loans. A CMO is specifically a CDO where the loans are mortgages.

## What Is a AAA Tranche?

Most pooled fixed-income investments consist of tranches, each assigned with a credit rating. Tranches assigned a AAA rating are of the best quality, meaning they are the least risky but also will have the lowest return. Sometimes a large corporation, project or sovereign government may require large amounts of funds. Banks may work together to offer funds and create [pro-rata tranches](https://www.investopedia.com/terms/p/pro-rata_tranche.asp). Pro-rata tranches will also have a credit rating assigned to it.  

## Conclusion: Making Investment Decisions With Tranches  

Tranches, often found in securitized products like mortgage-backed securities, provide investors with the ability to align their investments with their risk tolerance and financial goals. Senior tranches offer lower risk and more secure returns, while junior tranches present higher risk and potentially greater rewards. Understanding the distinctions among senior, mezzanine, and junior tranches is crucial for devising a tailored investment strategy. However, investors should remain cautious of potential misratings that can expose them to unintended risks, a lesson underscored by the 2007-2009 financial crisis.

> **Article Sources**
>
> 1.  Financial Times. "[‘Tranche Warfare’ Breaks Out Over CDOs](https://www.ft.com/content/ae3ce724-0a48-11dd-b5b1-0000779fd2ac)."
>     
> 2.  Superior Court of Connecticut. "[Carrington Asset Holding Company, LLC et al. v. American Home Mortgage Servicing, Inc](https://caselaw.findlaw.com/ct-superior-court/1543811.html)."