Johannesburg Interbank Average Rate and Its Impact

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The Johannesburg Interbank Average Rate (Jibar) is a crucial indicator of the South African economy. It's a weighted average of the interest rates charged by banks for overnight loans.

The Jibar is calculated daily and is used as a benchmark for interest rates in the country.

In simple terms, the Jibar determines how much interest you'll pay on your loans and how much interest you'll earn on your savings.

The Reserve Bank of South Africa uses the Jibar to set monetary policy and influence the overall direction of the economy.

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What is the Johannesburg Interbank Average Rate?

The Johannesburg Interbank Average Rate, or JIBAR, is the benchmark for short-term interest rates in South Africa.

It's calculated daily by the Johannesburg Stock Exchange for four different discount terms: one-month, three-month, six-month, and 12-month.

The rate is determined by averaging the borrowing and lending rates of a number of local and international banks.

Eight banks contribute to the calculation by submitting their bid and offer rates, which are then used to determine the mid-rate.

Credit: youtube.com, What Is the Johannesburg Interbank Average Rate (JIBAR)?

A mid-rate is calculated as a halfway point between the bid and offer rates provided by contributors.

The two highest and two lowest mid-rates are discarded, and the remaining four mid-rates are averaged to arrive at JIBAR.

The three-month JIBAR rate is the most widely used and accepted rate in South Africa.

An individual or business that seeks to borrow money from a South African bank will typically be quoted a rate tied to the three-month JIBAR.

For example, the rate quoted to a borrower looking to get a mortgage may be 'JIBAR + 7%'.

Regulatory Transition and Impact

The JIBAR transition is a market-driven event, not one compelled by regulators. Regulators and the central bank are collaborating with the industry to map a way forward.

Regulators are not abolishing JIBAR, and they won't be defining how the transition should take place. This means that the industry will need to work together to figure out the best approach.

Credit: youtube.com, South African Overnight Index Average

The transition will impact existing and future transactions that reference JIBAR, particularly in derivatives, bonds, and other financial products. This will be determined on a per contract basis, depending on the product and existing fallback language used.

Clients should review their documentation carefully and seek independent professional advice when considering a transition to alternative rates.

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Regulators' Role in Transition

The regulators and central bank are not abolishing JIBAR, and they will not be defining how the JIBAR transition should take place.

Regulators are collaborating with the industry, including trade associations, in mapping a way forward for the transition.

The JIBAR transition is a market-driven event, not a regulator-compelled event.

Regulators are working closely with the industry to ensure a smooth transition, but they are not taking a leading role in defining the specifics of the transition.

Impact on Based Products

The transition from JIBAR and other reference rates will impact existing and future transactions, particularly in derivatives, bonds, structured products, securitised products, loans, and mortgages.

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This impact will be determined on a per contract basis, depending on the financial product and existing fallback language used.

Clients should review their documentation carefully and seek independent professional advice when considering whether a transition to ARRs is best achieved.

The amendment process is likely to be different for each product type and is best discussed with RMB Relationship Managers.

Clients may amend the contract bilaterally or by participating in a market initiative, such as adhering to relevant ISDA protocols, or replace the product with a financial product that references the preferred ARR.

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Key Timelines for Implementation

The implementation of alternative rates is expected to have a significant impact on the industry, and it's essential to be aware of the key timelines involved. There is a strong likelihood that JIBAR, SABOR, SAFEX, and STeFI will cease to exist at some point in 2026.

The South African Reserve Bank (SARB) is yet to confirm this date, but you can find the industry timeline on their website. The SARB website is a valuable resource for staying up-to-date on the latest developments.

Reason for Replacement

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The Prudential Authority (PA) recognized JIBAR's need for replacement due to its failure to meet international criteria for a reference rate.

JIBAR is derived from an underlying market that is no longer used in significant volume.

Banks' submissions to sustain JIBAR's rate are often based on expert judgement rather than actual transactions.

SABOR, SAFEX, and STeFI have been identified as not being IOSCO compliant, similar to JIBAR, and may face the same remediation.

Process Review

The Johannesburg Interbank Agreed Rate (Jibar) has undergone a review of its rate-setting process, led by Deputy Governor Mminele.

This review was initiated proactively by the Financial Markets Liaison Group (FMLG) as part of its normal work programme, not in response to any specific event or problem.

The review involved consultations with commercial banks, the Johannesburg Stock Exchange, Strate, regulators, and the National Treasury.

The review has been completed and two documents were published on the Bank's website on 16 November 2012.

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The review found that while the Jibar determination process is sound, certain aspects can benefit from enhancements and formalisation, particularly the governance process.

The review contains recommendations to strengthen the governance process and increase the credibility of the Jibar rate.

A Code of Conduct is being formalised to ensure the integrity and reliability of the Jibar determination process.

The Code of Conduct is currently in consultation and comments or questions can be addressed to the Financial Markets department via email by 30 November 2012.

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Replacement and Alternatives

The Johannesburg Interbank Average Rate (JIBAR) is getting a makeover, and it's about time. The Prudential Authority released a paper in 2018 signaling that JIBAR needs to be replaced.

JIBAR's underlying market is no longer used in significant volume, so banks' submissions to sustain the rate are often based on expert judgment rather than actual transactions. This lack of actual transactions makes it harder to trust the rate.

Credit: youtube.com, South Africa Derivatives Market Adopts New Reference Rate: Zaronia Replaces JIBAR

The Prudential Authority formed the Market Practitioners Group to deal with South Africa's rates reform, and they're working to replace JIBAR with a more reliable rate. The underlying market that JIBAR is derived from is no longer used in any significant volume.

The South African Reserve Bank (SARB) has recommended ZARONIA (South African Overnight Index Average) as the alternative reference rate to JIBAR. ZARONIA is administered by the SARB and reflects the interest rate at which overnight wholesale funds are traded by banks in Rand.

ZARONIA is a backward-looking overnight unsecured rate, which is different from JIBAR's forward-looking rate with a 1-, 3-, 6- or 12-month tenor. This difference will bring complexity for companies impacted by the change.

The Alternative Reference Rate (ARR) that's been recommended to replace JIBAR is ZARONIA, which is designed to be more reliable and trustworthy.

Additional reading: Overnight Market

Fallback Language and Implementation

Fallback language is crucial for existing derivative contracts after a permanent cessation of JIBAR. The 2006 ISDA Definitions, which are standard terms often incorporated into interest rate derivatives, were drafted primarily for a temporary cessation of an IBOR.

Credit: youtube.com, Session 3: Managing interest rate and liquidity risk during the Jibar transition

ISDA is currently discussing the requirements for South African Reference Rates Reform with the MPG Legal Workstream. They will undertake work to implement more robust fallback language for JIBAR.

To prepare for the permanent cessation of JIBAR, clients should familiarize themselves with the new RFR fallback language. This will help them understand the impact on their portfolios and business.

The new ISDA Fallbacks are expected to be incorporated into new derivative contracts. Clients should also adhere to the Protocols and apply JIBAR fallback language to existing derivative contracts.

Here are the key steps to take:

  1. Incorporate the new ISDA Fallbacks into new derivative contracts.
  2. Adhere to the Protocols and apply JIBAR fallback language to existing derivative contracts.

It's essential to note that clients should consider seeking independent professional advice (legal, tax, accounting, financial or other) as appropriate. This will help them understand the impact of the discontinuation of JIBAR or other reference rates on their portfolios and business.

Derivatives and Acceptance

JIBAR Futures contracts are a popular tool for investors seeking to gain exposure to the South African interest rate market. These exchange-traded contracts have a value at expiration of 100 minus the three-month JIBAR rate at the expiry date.

Credit: youtube.com, ACTSA Webinar: Navigating the end of JIBAR - A Treasurers guide to the transition

Investors can use JIBAR Futures contracts to hedge against adverse interest rate movements or speculate on short-term interest rate fluctuations. This can be done by going long the contract when interest rates are expected to decrease.

The Johannesburg Interbank Average Rate (JIBAR) serves as a key reference rate for pricing various financial instruments, including loans, bonds, and derivatives.

Derivatives

Derivatives are contracts that derive their value from an underlying asset or rate, such as the Johannesburg Interbank Average Rate (JIBAR). This underlying asset can be a commodity, currency, or interest rate.

JIBAR Futures, also known as STIR contracts, are traded on an exchange and have a value at expiration of 100 minus the three-month JIBAR rate. The contract's value decreases as the expected three-month JIBAR rate increases.

Investors can use these contracts to gain exposure to the South African interest rate market, seeking protection against adverse interest rate movements or hoping to take advantage of short-term movements in interest rates. This can be done by hedging or speculating.

Shorting a STIR contract means selling the contract when interest rates are expected to rise, while going long means buying the contract when interest rates are expected to fall.

What is Acceptance?

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Acceptance is a crucial concept in the context of derivatives and financial markets. It refers to the willingness of banks to lend to each other on an unsecured basis.

JIBAR, the Johannesburg interbank acceptance rate, serves as a key reference rate for pricing various financial instruments, including loans and bonds.

The rate is calculated daily by the JIBAR administrator, taking into account submissions from a panel of contributing banks. Each contributing bank provides its estimate of the interest rate at which it could borrow funds in the South African interbank market.

Changes in JIBAR rates can have significant implications for financial markets and the broader economy.

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Example and Explanation

The Johannesburg interbank average rate is a key concept to understand if you're looking to borrow or lend money in the South African market. It's essentially a benchmark interest rate that reflects the average rate at which banks lend to each other.

The rate is set on a daily basis, giving you a clear idea of the current market conditions.

Credit: youtube.com, Finweek TV Citi - LIBOR & JIBAR explained

To give you a better idea of how this rate works, let's consider an example. If you borrow R100,000 from another bank for a short-term period, say one month, and the prevailing Johannesburg interbank average rate is 6%, you'll pay an annualised interest rate of 6% on the amount borrowed for that one-month period.

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Frequently Asked Questions

What is the average loan rate in South Africa?

As of 31 July 2025, the prime lending rate in South Africa is 10.50%, based on a repo rate of 7.00%. This rate may be subject to change, so it's always a good idea to check the latest information.

Joan Corwin

Lead Writer

Joan Corwin is a seasoned writer with a passion for covering the intricacies of finance and entrepreneurship. With a keen eye for detail and a knack for storytelling, she has established herself as a trusted voice in the world of business journalism. Her articles have been featured in various publications, providing insightful analysis on topics such as angel investing, equity securities, and corporate finance.

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