Published On: Fri, Jan 22nd, 2010

Interruption of Dissemination of Hang Seng Indexes

Hong Kong Exchanges and Clearing Limited (HKEx) was informed by Hang Seng Indexes Company Limited (HSIL) this morning that HSIL’s index system was interrupted. As a result, the dissemination of HSIL’s indexes through HKEx’s trading and information systems was suspended between approximately 10:00 am and 10:32 am. At approximately 10:33 am, HSIL was able to resume its calculation and dissemination of the indexes.

All trading and information dissemination systems of HKEx continued to operate normally during the period HSIL’s system was interrupted. HKEx’s Exchange Participants and information vendors were advised of the interruption through HKEx’s alert messages. HKEx is in contact with HSIL and will use HSIL’s official index levels for determination of related Callable Bull/Bear Contract, or CBBC, knockouts during the interruption period. HKEx notes that HSIL is looking into the cause of the system interruption.

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