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Published on May 16, 2025 by Susan Kelly

SOFR — What Is the Secured Overnight Financing Rate?

The Secured Overnight Financing Rate (SOFR) has emerged as a vital benchmark interest rate within financial markets, providing a reliable alternative to the London Interbank Offered Rate (LIBOR). Developed by the Federal Reserve Bank of New York, SOFR is grounded in overnight transactions in the U.S. Treasury repurchase agreement (repo) market, which involves borrowing and lending Treasury securities. Unlike LIBOR, which is based on estimated borrowing rates, SOFR’s reliance on actual transaction data ensures greater transparency and reliability. With the global shift away from LIBOR, understanding SOFR’s mechanics, significance, and applications is crucial for financial professionals, institutions, and investors to navigate the evolving landscape of interest rate benchmarks effectively.

What is SOFR?

SOFR is an interest rate that measures the cost of borrowing cash overnight, collateralized by Treasury securities. It is calculated and published daily by the Federal Reserve Bank of New York, based on actual transactions in the repo market. This transparency and accuracy distinguish SOFR from LIBOR, which relied heavily on expert judgment rather than actual transaction data.

Why was SOFR created?

SOFR was developed to replace LIBOR, which faced scandals and manipulation issues. As LIBOR’s phase-out approached, financial institutions required a new benchmark to price loans, investments, and derivatives. SOFR was chosen because it is based on real transactions, reflecting the current state of the repo market and providing a more reliable measure of funding costs.

Calculation Methodology

SOFR is calculated using transaction data from the repo market, specifically tri-party repo transactions. These are overnight loans collateralized by Treasury securities, forming a significant portion of the overall repo market. The New York Fed collects data from the two largest tri-party agents, Bank of New York Mellon and JPMorgan Chase, and calculates SOFR as a volume-weighted median of rates on overnight Treasury-backed repo transactions.

Daily calculation process:

  1. The New York Fed collects transaction data from tri-party agents at 8:30 AM.
  2. Outliers or errors in the data are identified and removed.
  3. The remaining transactions are sorted in ascending order by rate.
  4. The middle 50% of rates (excluding the highest and lowest 25%) are averaged to find the volume-weighted median.
  5. SOFR is published on the New York Fed’s website at 8:00 AM the next business day.

Impact of SOFR

SOFR’s adoption will significantly impact various financial products and markets. Key areas affected include:

Benefits of SOFR

Challenges and Concerns

Despite its benefits, SOFR faces challenges and concerns, including:

Future of SOFR

As the financial world transitions away from LIBOR, the future of SOFR appears promising. However, as a relatively new benchmark, it may face challenges and adjustments during broader adoption. The Federal Reserve is also exploring alternative reference rates, such as the SOFR Averaged Over a Term (SOFR AOT), which may offer a smoother transition for longer-term products.

Understanding SOFR and its role in the financial system is crucial for staying informed and making well-informed decisions in the future. Keeping up with developments and updates surrounding SOFR is essential as it continues to shape the financial landscape. Overall, the shift from LIBOR to SOFR represents a significant change with far-reaching effects, and staying knowledgeable about it can provide valuable insights into navigating the changing financial landscape.

Final Thoughts

SOFR is a crucial benchmark for the financial industry, offering a more transparent and accurate measure of funding costs. Its adoption will bring notable changes in various areas, including loan pricing, investments, and derivatives markets. While challenges and concerns exist regarding its transition from LIBOR, SOFR’s future looks promising as it continues to influence the world of finance. Staying informed about SOFR and its developments will be essential for navigating this transition and making informed decisions in the future. Monitoring updates and developments surrounding SOFR will help you stay ahead in an ever-evolving financial landscape.