The Swiss Franc Benchmark

SIX developed SARON in collaboration with the Swiss National Bank in 2009.

Overnight interest rates play a key role in determining the yield curve. The starting point for the Swiss franc yield curve is SARON, which stands for Swiss Average Rate Overnight. This overnight rate is based on the Swiss franc repo market. The calculation is based on completed transactions and representative quotes on the SIX Repo AG trading platform. Repo transactions are available to market participants as a short-term refinancing and investment instrument for their liquidity management and are thus an important component of the money market. The Swiss National Bank (SNB) uses repo transactions to implement its monetary policy.

SIX handles the daily calculation and distribution of SARON. The National Working Group for Reference Interest Rates in Swiss francs officially recommends SARON as an alternative to CHF Libor.

Five Key Differences Between SARON and LIBOR

Reference interest rates are important. And not just as far as monetary policy is concerned. Financial contracts for loans, savings deposits and mortgages all refer to these rates, which also provide an essential baseline on the derivatives market or for structured products. In less than two years, support for LIBOR will be removed and banks will have to switch contracts, products, systems and processes based on the rate to new, alternative reference rates (ARR). For the Swiss market, SIX provides a robust alternative to the CHF LIBOR with SARON that offers five key advantages:

Overview of the 5 Differences

Money Market SIX operates the fully automated trading platform (SIX Repo) for the secured money market (short-term credit funding) in Switzerland. The SARON reference rate reflects this repo market. “Funding against collateral” is the rule here. The LIBOR reference rate reflects the unsecured money market (short-term credit funding). “Funding against creditworthiness” is the rule here (no collateral required).
Participants Some 160 banks and insurance companies take part in the Swiss repo market, including the Swiss National Bank (SNB), which uses it to supply Switzerland’s economy with liquidity. A group of 11 to 16 panel banks is involved in setting LIBOR.
Basis Banks lend money to each other, with securities being deposited as collateral (secured interbank market). The borrower undertakes to repurchase these securities at a later date and pays interest. The panel banks answer the question of what interest rate they could borrow funds at if they ask for an interbank offer in a reasonable market size. Illicit collusion between some of those panel banks caused the LIBOR scandal in 2011.
Values & Calculation Actual concluded transactions and quotes flow into the calculation of SARON. That’s approximately 110 interest rates per day on an annual average. The estimates submitted by the panel banks flow into the calculation of LIBOR. Between 5 and 8 interest rates are used, depending on the number of banks involved. The 3 to 4 highest and lowest interest rates are discarded.
Publishing – Calculated/published every ten minutes
– Fixing conducted three times a day (closing rate: 6:00 pm)
– Available in one currency (CHF)

– Calculated once a day
– Published once a day
– Available in five currencies (CHF, EUR, GBP, JPY, USD)

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Support for LIBOR will be removed in less than two years. SARON is a robust alternative with key advantages over LIBOR, recommended by the National Working Group on the Swiss Franc Reference Rate.


SARON represents the overnight interest rate of the secured money market for Swiss franc (CHF), and is a resilient alternative to CHF-LIBOR. It reflects both actual transactions and binding quotes in the Swiss repo market, a pivotal aspect of the Swiss financial industry, with a methodology that ensures robustness. Learn more about the service in this section.

SARON Factsheet

Click through to our factsheet containing a more detailed overview of why SARON is a reliable alternative to CHF-LIBOR in anticipation of incoming regulatory changes. The factsheet includes information on the rate’s methodology, why it represents an improvement over LIBOR, as well as information on licensing and more.

SARON: the New Reference Rate for Switzerland

The reference rate SARON, which stands for Swiss Average Rate Overnight, represents the overnight interest rate of the secured money market for Swiss francs (CHF). It is based on transactions and quotes posted in the Swiss repo market, a pivotal part of the Swiss Value Chain. The video explains in 2 minutes what you need to know about SARON.