New Regulation for Repo Operations Enters Effect in Istanbul Stock Exchange

Effective Date The regulation, published in the Official Gazette No.
33366 on September 10, 2026, came into force through the Capital Markets Board (SPK) and Istanbul Stock Exchange (Borsa İstanbul).
Scope and Purpose The regulation covers repo and reverse repo transactions that do not receive central clearing services in the Borsa Repo and Reverse Repo Market.
Its aim is to increase transparency and auditability of these operations.
Conditions for Invalidity Transactions will be deemed invalid if securities are not reported within the stipulated period or are not blocked in the relevant account in the name of the fund.
In such cases, Borsa İstanbul will reverse the transaction following a notification from Takasbank.
Cancellation and Oversight SPK and Borsa İstanbul oversee the validity of transactions.
If the conditions are not met, the related transactions are cancelled.
The Istanbul Stock Exchange Board manages the implementation and monitoring.
Conclusion The new regulation strengthens risk management in the repo and reverse repo market and aims to boost confidence among investors and market participants.