What is an 'Interest Rate Collar'

An interest rate collar is an investment strategy that uses derivatives to hedge an investor's exposure to interest rate fluctuations. An interest rate collar protects a borrower against rising interest rates while setting a floor on declining interest rates.

BREAKING DOWN 'Interest Rate Collar'

A collar is an options strategy which involves holding the underlying security, and buying a protective put while simultaneously selling a covered call against the holding. The premium received from writing the call pays for the purchase of the put option. In addition, the call caps the upside potential for appreciation of the underlying security’s price, but protects the hedger from any adverse movement in the value of the security. A type of collar is the interest rate collar.

The interest rate collar involves the simultaneous purchase of a purchase of an interest rate cap and sale of an interest rate floor on the same index for the same maturity and notional principal amount.

Interest Rate Cap and Floor

An interest rate cap is a provision in variable rate debt instruments that has an interest rate ceiling on interest payments. It is simply a series of call options on a floating interest rate index, usually 3- or 6- month LIBOR, which coincides with the rollover dates on the borrower’s floating liabilities. The strike price, or strike rate, of this derivative represents the maximum interest rate payable by the purchaser of the cap.

An interest rate floor is the minimum interest rate that may be paid on a contract. It reduces the risk to the party receiving the interest payments since the coupon payment each period will be no less than a certain floor rate or strike rate.

Interest Rate Collar

An interest rate collar can be an effective way of hedging interest rate risk associated with holding bonds. With an interest rate collar, the investor purchases an interest rate ceiling which is funded by the premium received from selling an interest rate floor. Remember that there is an inverse relationship between bond prices and interest rates – as interest rates fall, bond prices rise, and vice versa. The objective of the buyer of an interest rate collar is to protect against rising interest rates. Purchasing an interest rate cap (put option) can guarantee a maximum decline in the bond's value. Although an interest rate floor (call option) limits the potential appreciation of a bond given a decrease in rates, it provides upfront cash and generates premium income that pays for the cost of the ceiling.

Let's say an investor enters a collar by purchasing a ceiling with a strike rate of 10% and sells a floor at 8%. Whenever the interest rate is above 10%, the investor will receive a payment from the seller of the ceiling. If the interest rate drops below 8%, which is below the floor, the investor who is short the call must now make a payment to the party that purchased the floor.

Clearly, the interest rate collar strategy protects the investor by capping the maximum interest rate paid at the collar's ceiling, but sacrifices the profitability of interest rate drops.

Reverse Interest Rate Collar

A reverse interest rate collar protects a lender, e.g. a bank, against declining interest rates. It involves the simultaneous purchase (or long) of an interest rate floor and sale (or short) of an interest rate cap. The premium received from the short cap partly offsets the premium paid for the long floor. The long floor receives a payment when the interest rate falls below the floor exercise rate. The short cap makes payments when the interest rate exceeds the cap exercise rate.

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