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Deciphering Indexed Rates: Types, Calculation, and Market Impact

Last updated 03/15/2024 by

Rasana Panibe

Edited by

Fact checked by

Summary:
An indexed rate is an adjustable interest rate tied to a specific benchmark, fluctuating based on the benchmark’s movement. Common benchmarks include the prime rate, LIBOR, and U.S. Treasury rates. Indexed rates are prevalent in variable-rate credit products like adjustable-rate mortgages, impacting borrowers’ payments as the benchmark shifts.

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What is an indexed rate?

An indexed rate refers to an interest rate connected to a particular benchmark, varying in tandem with the benchmark’s fluctuations. These rates, prevalent in variable-rate credit products, differ from fixed rates as they adjust in response to changes in the selected benchmark.

Understanding an indexed rate

Indexed rates denote variable interest rates tied to specific benchmarks. Unlike fixed rates, these fluctuate based on changes in the associated benchmark, affecting borrowers’ interest payments. They can be offered as an indexed rate or a fully indexed rate, the latter including an additional premium.

Popular benchmarks for indexed rates

Several benchmarks commonly influence indexed rates, with notable examples including the prime rate, LIBOR, and U.S. Treasury securities. Each benchmark represents a distinct segment of the market and impacts interest rates differently.

Prime rate

The prime rate stands as an average of rates offered by banks to their most creditworthy borrowers. It remains subject to adjustments based on prevailing market conditions. Loans tied to the prime rate are typically linked to a specific bank’s prime rate.

LIBOR

LIBOR, or the London InterBank Offered Rate, serves as a widely utilized benchmark for interest rates. The ICE Benchmark Administration manages LIBOR, which offers a variety of rates every day across various credit products. However, the use of LIBOR is set to phase out by June 30, 2023, as per the Federal Reserve’s directives.

Treasuries

The yields on U.S. Treasury bonds serve as another common benchmark for interest rates, offering varying rates across different maturities and influencing credit products accordingly.

Indexed rates on mortgages

When mortgages are linked to indexed rates rather than fixed rates, they become adjustable-rate mortgages (ARMs). ARMs can present benefits or risks to homeowners as the mortgage payments change in response to fluctuations in the indexed rate, potentially impacting financial stability.

Fully indexed interest rates

Fully indexed rates encompass the base indexed rate along with an added premium, typically charged to borrowers with lower credit quality. Based on borrower information, the underwriter determines the spread, which represents the associated risk.
Weigh the Risks and Benefits
Here is a list of the benefits and drawbacks to consider.
Pros
  • Flexibility in interest rate adjustments
  • Potential for lower initial rates
Cons
  • Uncertainty in future rate changes
  • Possibility of higher payments if rates rise

Frequently asked questions

What determines the choice of an indexed rate for a financial product?

The lending institution typically decides and discloses the specific benchmark used for an indexed rate product. Borrowers can compare benchmarks among various institutions but usually cannot choose the specific indexed rate for a product.

How does credit quality affect the fully indexed interest rate?

Credit quality significantly influences the fully indexed rate. Borrowers with higher credit scores and lower debt-to-income levels usually incur lower spreads, reflecting lower associated risk.

Key takeaways

  • An indexed rate fluctuates based on a chosen benchmark.
  • Indexed rates are prevalent in variable-rate credit products like adjustable-rate mortgages.
  • Benchmarks such as prime rates, LIBOR, and U.S. Treasury bonds commonly influence indexed rates.
  • Adjustable-rate mortgages (ARMs) are mortgages tied to indexed rates.
  • Fully-indexed rates include a premium and are based on the borrower’s credit quality.

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