admin
Introduction
South Africa’s Competition Commission has formally referred the Johannesburg Stock Exchange (JSE) to the Competition Tribunal over alleged exclusionary conduct that dates back to 2017. At the heart of the referral are allegations about the JSE’s broker-dealer accounting (BDA) system and the treatment of matched principal trades, which rival A2X says made competition difficult. The Commission seeks remedies including changes to rules and a possible fine. The JSE denies wrongdoing and will file a plea. The referral raises urgent questions about access to trading infrastructure and the future of secondary market competition in South Africa. (Reuters)
Stock exchange: Question 1 — What exactly is the allegation?
The Commission alleges the JSE enforced mandatory use of its BDA system among brokers and adopted practices that treated trades initiated on competing venues differently. That conduct is claimed to have foreclosed rivals from competing effectively in secondary trading. The complaint points to technical incompatibility and rule design that limited cross-platform settlement and matching, thereby harming competitors and ultimately investors. The referral frames the conduct as exclusionary under the Competition Act. (Reuters)
Stock exchange: Question 2 — When did this start?
The Commission’s probe traces conduct back to 2017. A2X later lodged a formal complaint in 2022 after raising concerns about rule and system interoperability. The multi-year investigative process culminated in the Commission filing a notice of motion to refer the matter to the Tribunal in October 2025, made public in November. This timeline matters because it shows a long-running dispute over market access that regulatory review eventually escalated. (Reuters)
Stock exchange: Question 3 — What is matched principal trading and why it matters?
Matched principal trading allows brokers to match buyer and seller interests and execute trades without direct principal risk. The Commission’s claim is that the JSE’s rules allowed more favourable consolidation and processing for trades that originated on JSE while restricting equivalent flows initiated on competitor platforms. Differential treatment in MPT handling can substantially alter execution economics and the attractiveness of alternative venues for brokers and clients. (Reuters)
Stock exchange: Question 4 — What remedies is the Commission seeking?
The Commission has asked the Tribunal to consider behaviour- or rule-based remedies and potentially a financial penalty. Reporting notes a maximum fine could reach 10% of JSE turnover for serious contraventions, a figure the Commission has signalled could be on the table. Remedies could focus on forcing technical interoperability, amending trading rules, and preventing rule designs that unfairly advantage one platform over others. (News24)
Stock exchange: Question 5 — How has the JSE reacted?
The JSE has denied the allegations and said it will prepare a plea. In statements, the exchange argued that the non-confidential public summaries do not tell the full story and that it will contest the referral. The JSE’s formal legal response is due in early 2026 by agreement with the Commission, after which Tribunal proceedings and scheduling will determine the pace of hearings. (Moneyweb)
Stock exchange: Question 6 — Why does this matter to brokers and trading platforms?
If the Tribunal orders changes, brokers could gain more freedom to choose back-office systems or route matched principal trades across different venues, lowering switching costs for platforms like A2X. For challengers, legally enforceable interoperability removes a major friction that can prevent market entry, stimulating innovation and potentially improving execution quality for end investors. (Reuters)
Stock exchange: Question 7 — Could this set a precedent?
Yes. A Tribunal finding that exchange-level technical rules and mandatory systems can be exclusionary would send a strong signal to dominant market platforms across jurisdictions. It would clarify that exchange governance and required systems are within competition law’s reach when they materially foreclose rivals, reinforcing the idea that market infrastructure must not be used as a shield against competition. (globalcompetitionreview.com)
Stock exchange: Practical short-term impacts
In the near term, listed companies and market participants should expect ongoing media attention and possible volatility in market perceptions of the JSE’s governance. Brokers and clearing participants may review contingency plans for settlement and routing. For A2X and other challengers, the referral is a validation of regulatory traction, even as a full legal victory is not guaranteed and will depend on evidence presented at Tribunal. (Reuters)
Stock exchange: Timing and procedural outlook
The Commission filed its notice of motion on Oct. 1 and made the referral public in November 2025. By agreement, the JSE will lodge its plea in early 2026; thereafter the Tribunal will set procedural timetables. Progress could be measured in months to years depending on the evidence volume, interlocutory applications, and whether the parties negotiate remedies outside a full hearing. (Government of South Africa)
Stock exchange: How stakeholders should prepare
Stakeholders should document how trading and settlement processes are affected by platform choice, preserve records showing interoperability issues, and consider technical audits. Broker-dealers and rival platforms should use the period to clarify business continuity and client communication plans while regulators and industry bodies may consult on potential rule reforms or technical standards to reduce friction across venues. (Reuters)
FAQs
Q: Will this change where I trade shares?
A: Stock exchange competition could widen venue choice but immediate changes depend on Tribunal outcomes.
Q: Is a 10% fine likely?
A: Stock exchange fines are possible; the Commission has asked for up to 10% of turnover, but outcomes vary by case. (News24)
Q: Can A2X operate while the case runs?
A: Stock exchange operations continue; the case targets rule conduct, not an operating ban. (Finextra Research)
Conclusion
The Competition Commission’s referral of the JSE is a major test of how competition law interacts with market infrastructure. The outcome will influence platform access, broker workflows and the competitive landscape for secondary trading in South Africa. Stakeholders should track pleadings and evidence closely — the Tribunal’s ruling could influence market structure beyond national borders
Ali