Interest Rate Floor

It is an agreement between two parties where the buyer pays the seller a premium.

Author: Rohan Arora
Rohan Arora
Rohan Arora
Investment Banking | Private Equity

Mr. Arora is an experienced private equity investment professional, with experience working across multiple markets. Rohan has a focus in particular on consumer and business services transactions and operational growth. Rohan has also worked at Evercore, where he also spent time in private equity advisory.

Rohan holds a BA (Hons., Scholar) in Economics and Management from Oxford University.

Reviewed By: Christopher Haynes
Christopher Haynes
Christopher Haynes
Asset Management | Investment Banking

Chris currently works as an investment associate with Ascension Ventures, a strategic healthcare venture fund that invests on behalf of thirteen of the nation's leading health systems with $88 billion in combined operating revenue. Previously, Chris served as an investment analyst with New Holland Capital, a hedge fund-of-funds asset management firm with $20 billion under management, and as an investment banking analyst in SunTrust Robinson Humphrey's Financial Sponsor Group.

Chris graduated Magna Cum Laude from the University of Florida with a Bachelor of Arts in Economics and earned a Master of Finance (MSF) from the Olin School of Business at Washington University in St. Louis.

Last Updated:November 27, 2023

What is an Interest Rate Floor?

An interest rate floor (IRF) is an agreement between two parties where the buyer pays the seller a premium. In return, the seller will pay the buyer the difference between the specified floor rate and the lower variable rate. This is only if the variable rate falls below the floor. 

It is designed to protect investors against a fall in interest rates while allowing them to profit from a rise. They are often used in loan agreements and derivative contracts. 

An interest rate floor is the opposite of an interest rate ceiling, which is the maximum interest rate permitted in a certain transaction. 

IRFs are frequently used in the adjustable-rate mortgage (ARM) market. An ARM is a loan for a home with a variable interest rate. In the beginning, the loan will have a fixed interest rate, but after fixed periods of time, it will reset periodically. 

IRFs are often purchased as a part of a reverse interest rate collar. This is the simultaneous purchase of an interest rate floor and selling of an interest rate cap.

When traders or borrowers want to understand their downside limit, they can use the floor as a guide. This can be used to tell the level of risk they are undertaking.

Understanding Interest Rate Floors

A multitude of market participants uses IRFs. They serve to hedge against the risk associated with variable interest rate loans. 

The buyer of this contract will be doing so to receive a payout should the interest rate fall below the negotiated rate. The buyer will be compensated for the lost interest when the interest rate falls; the seller will cover this compensation. 

The buyer will have to pay a premium to the seller for this protection. This means even if the interest rate is above the floor, the buyer will have to pay a small premium, just like any other insurance contract. This is how the seller makes their money. 

Deciding at what value the floor should be set is extremely important for both parties in this scenario. If the interest rate floor is set too high, then you may have the seller have to pay out compensation too often, and they will not be profitable. 

If the floor is set too low, the buyer will continue to pay their premiums. However, if the interest rate never falls below the floor, they will never receive any compensation.  

There are three common interest-rate derivative contracts:

Interest rate floor and cap contracts are derivative products commonly bought on market exchanges.

Interest rate swaps are slightly different as they require two separate participants to agree on swapping an asset. This usually involves the exchanging of floating-rate debt for fixed-rate debt. 

Instead of the normal exchange of balance sheet assets, interest rate floor and interest rate cap contracts can be used. This is an interest rate swap.

Downsides of an Interest Rate Floor

These are generally seen as positives for both parties involved, with the buyer being offered protection and the seller receiving premiums. However, if the IRF is miscalculated, then problems can begin to arise.

If the floor is set too low, the buyer will pay for premiums but not be offered compensation. This is because if the floor is too low, the rate will never fall below, and the seller will never have to pay out. In this scenario, the buyer is at a disadvantage.

If the floor is set too high, the seller must pay out compensation constantly. This is because if the floor is too high, the rate will always be below it, and the seller will have to pay compensation. In this scenario, the seller is at a disadvantage.

What Does an Interest Rate Floor Look Like?

IRFs are incredibly useful for investors who buy derivatives. They ensure that their returns will never fall below a given amount. They are crucial in hedging against the risk of falling interest rates. 

Without them, investors would be at risk of diminishing returns if interest rates fell below a certain level. 

Formula: For calculation

Payout = (X * R) - (X * Fr)

Where:

  • X = Size of loan 
  • R = Interest rate 
  • Fr = Negotiated rate 

Example: A lender in the United States is securing a floating-rate loan and looking to hedge against declining interest rates. This is to protect their returns.

If the lender buys an interest rate floor contract with a floor of 7%, the lender is protected if the R falls below 7%. 

If the floating rate on a $10 million negotiated loan fell to 5%, the contract states that the payout would be $200,000. This is because

(($10 million x 0.07) - ($10 million x 0.05)) - $200,000

Interest Rate Floor FAQs

Researched and authored by “Seb Bailey” | LinkedIn 

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