by 5paisa Research Team Last Updated: 2023-06-27T16:33:10+05:30
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For years, the financial world relied on the London Interbank Offered Rate (LIBOR) as the go-to benchmark for interest rates on loans. However, a series of controversies and its involvement in the 2008 financial crisis led to its demise. Stepping into the void left by LIBOR, the Secured Overnight Financing Rate (SOFR) has emerged as the new standard in the United States.

In this article, we'll explore the essence of the Secured Overnight Financing Rate. Discover the SOFR meaning and the profound impact it has on interest rates

What Is the Secured Overnight Financing Rate (SOFR)?

SOFR full form is Secured Overnight Financing Rate. It is a pivotal interest rate utilised by banks to determine the pricing of derivatives and loans denominated in U.S. dollars. Unlike the Overnight Rate, which represents the benchmark interest rate for interbank lending over a single night, the SOFR rate specifically focuses on the cost of securing overnight cash borrowing backed by treasury securities. It serves as a reliable indicator of funding costs, offering a transparent and robust reference point for financial institutions and market participants.

What is the impact of change in the Overnight Rate?

The impact of changes in the Overnight Rate carries significant implications for various aspects of the economy. When the Overnight Rate rises, it has an indirect effect on mortgage rates, as banks incur higher costs in settling their debts. Consequently, to offset these increased expenses, banks often raise the rates on long-term loans. This adjustment directly influences critical economic factors such as employment levels, economic growth, and inflation rates within the country. In response to evidence of economic expansion, central banks may opt to lower the Overnight Rate as a measure of monetary expansion.

Conversely, a low Overnight Rate creates an environment where banks and other financial institutions can engage in more frequent lending and borrowing activities, which in turn promotes economic expansion. Furthermore, a lower Overnight Rate signifies easier access to loans for both consumers and businesses. Consequently, the commercial sector experiences growth, as there is increased cash flow available for business expansion and heightened investor interest. This expansion of commercial activity not only benefits businesses but also enhances the purchasing power of consumers.

Understanding the Secured Overnight Financing Rate (SOFR)

To comprehend the true importance of the Secured Overnight Financing Rate (SOFR), it is crucial to recognize its role in derivatives trading, particularly interest-rate swaps. These swaps enable corporations and other entities to effectively manage interest-rate risks and speculate on fluctuations in borrowing costs. In such agreements, parties exchange fixed-rate interest payments for floating-rate interest payments based on the SOFR.

For instance, when engaging in a standard interest-rate swap, one party commits to a fixed interest rate while the counterparty agrees to a floating interest rate determined by the SOFR. Depending on credit rating and prevailing interest-rate conditions, the floating rate may vary in relation to the SOFR.

This arrangement presents an opportunity for the payer to benefit from rising interest rates. As the value of incoming payments tied to the SOFR increases, the payer gains, even though the cost of fixed-rate payments to the counterparty remains unchanged. Conversely, a decline in interest rates yields the opposite outcome.

History of the Secured Overnight Financing Rate (SOFR)

The history of the Secured Overnight Financing Rate (SOFR) is closely linked to the previous benchmark rate known as the London Interbank Offered Rate (LIBOR). LIBOR was widely used as the reference interest rate for credit agreements, encompassing five major currencies and various maturities. It was calculated based on the average interest rate at which major global banks borrowed from each other. Among the currencies, the three-month U.S. dollar LIBOR rate was the most commonly cited.

However, concerns about the reliability and integrity of LIBOR prompted the search for a more robust alternative. In response, the Secured Overnight Financing Rate (SOFR) emerged as a new benchmark rate. Unlike LIBOR, SOFR is derived from actual transactions in the U.S. Treasury repurchase market, specifically focusing on secured overnight borrowing backed by treasury securities. This calculation methodology ensures transparency and accuracy in reflecting the costs of overnight borrowing.

The Secured Overnight Financing Rate (SOFR) vs. LIBOR

The comparison between the Secured Overnight Financing Rate (SOFR) and LIBOR reveals significant differences in their underlying methodologies and reliability as benchmark rates. Unlike LIBOR, the Treasury repo market exhibits substantial trading activity, with a staggering volume of approximately $4.8 trillion in June 2023. This vibrant market activity theoretically positions SOFR as a more precise indicator of borrowing costs, given the extensive transactions observed.

Furthermore, the methodology used to calculate SOFR sets it apart from LIBOR. SOFR relies on data obtained from observable transactions, ensuring a more accurate representation of actual borrowing rates. In contrast, LIBOR was often susceptible to estimates or even falsified borrowing rates, leading to concerns about its integrity and credibility.

Adaptation to the Secured Overnight Financing Rate (SOFR)

As the Secured Overnight Financing Rate (SOFR) gains prominence as the preferred benchmark for dollar-denominated derivatives and credit instruments, the financial industry is undergoing a significant adaptation process. While both SOFR and the London Interbank Offered Rate (LIBOR) currently coexist, it is anticipated that SOFR will gradually replace LIBOR in the coming years. This transition necessitates market participants to adjust their practices and instruments to align with the evolving landscape, ensuring a smooth integration of SOFR as the primary benchmark.

Transitioning to the Secured Overnight Financing Rate (SOFR)

The transition to the Secured Overnight Financing Rate (SOFR) gained momentum following the Federal Reserve's announcement on November 30, 2020. This pivotal decision outlined a phased-out approach to replace LIBOR with SOFR by June 2023. In alignment with this timeline, banks were directed to discontinue the creation of new contracts using LIBOR by the end of 2021.

During this ongoing transition, certain challenges arise, particularly in the derivatives market. However, the impact of transitioning to SOFR extends beyond derivatives and encompasses consumer credit products, including adjustable-rate mortgages and private student loans, as well as debt instruments such as commercial paper. 

Notably, for borrowers with adjustable-rate mortgages tied to SOFR, the movement of the benchmark rate determines their payments once the fixed interest period of their loan ends. Higher SOFR rates at the loan reset result in increased payment obligations for homeowners.


The transition from LIBOR to the Secured Overnight Financing Rate (SOFR) marks a significant milestone in the financial industry. SOFR's transaction-based methodology provides a reliable benchmark for interest rates, ensuring greater transparency and accuracy. With its increasing adoption, SOFR is reshaping the way interest rates are determined and impacting various financial instruments.

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Frequently Asked Questions

SOFR is a benchmark interest rate based on overnight loans secured by Treasury securities. It is important because it provides a transparent and reliable reference rate for financial transactions, including loans and derivatives, replacing the discontinued LIBOR.

SOFR differs from LIBOR as it is based on actual transaction data in the Treasury repo market, while LIBOR relies on banks' estimates. SOFR focuses on overnight borrowing costs in the U.S. dollar, whereas LIBOR covers multiple currencies and maturities.

SOFR is calculated by taking the volume-weighted median of transactions in the Tri-party Repo Market, GCF Repo Market, and Bilateral Repo Market. This calculation methodology ensures that the rate accurately reflects the cost of overnight borrowing secured by Treasury securities.

The challenges in transitioning to SOFR include updating contracts, financial systems, and processes to incorporate SOFR as the new benchmark rate. Market participants need to manage basis risks and complexities when transitioning from LIBOR to SOFR. Effective communication, education, and coordination across the industry are crucial for a successful transition, along with regulatory guidance and industry collaboration.