Revised Return on Liquidity Monitoring Tools (MA(BS)23) Implementation Timeline Update

HONG KONG MONETARY AUTHORITY 香港金融管理局 Banking Policy Department Our Ref: S4/16C B1/15C 9 September 2025 The Chief Executive All Authorized Institutions Dear Sir/Madam, Revised Return on Liquidity Monitoring Tools (MA(BS)23) Further to our letter of 9 June 2025 regarding the revised template and completion instructions for MA(BS)23, I am writing to provide you with an update on the implementation timeline of this revised return. We have received feedback that some Authorized Institutions (AIs) continue to face challenges in meeting the implementation timeline of the revised MA(BS)23 (i.e with first reporting position of 31 December 2025). After careful consideration of these concerns and balancing them with the importance of timely collection of additional liquidity information under the revised MA(BS)23, the HKMA has decided to adopt the following middle ground approach: Extended Implementation Timeline: The first reporting position of the revised MA (BS)23 is further deferred to 30 June 2026, providing AIs with additional time to prepare for necessary system enhancements; and Targeted Data Collection: Meanwhile, the HKMA will engage with selected AIs individually to solicit liquidity information that resembles some of the data to be collected through the revised MA(BS)23. This approach provides AIs with more preparation time for reporting under the revised MA (BS)23, while allowing the planned enhancements to supervisory surveillance and stress testing work to proceed in a timely manner We encourage all AIs to continue their preparations diligently to ensure a smooth transition to the revised reporting requirements by the new effective date. Should 55th Floor, Two International Finance Centre 8 Finance Street, Central, Hong Kong Website: www.hkma.gov.hk 香港中環金融銜8 號國際金融中心2 期55 樓 網址：www.hkma.gov.hk

2 you Ms have any queries regarding this circular, please Sally Lo (2878-1521) or your usual superviso芎 Yours faith魚11乳 Martin Sprenger Acting Executive Director (Banking Policy) contact Mr Eric Ng (2878-8603), contact at the HKMA. cc: The Chairperson, The Hong Kong Association of Banks The Chairperson, The DTC Association FSTB (Attn: Mr Timothy Wong)