9 January 2004

Trading System Issue

As communicated earlier today, the Exchange has experienced a technical problem causing some messages to be rejected, due to a minor power issue.

In order to resolve the issue the Exchange will be introducing additional Host Security Module (HSM) capacity to process trading messages.

This may result in some trading messages being rejected with a HSM related-error message, while this process is being completed.

To minimize the impact of these error messages the Exchange will be invoking a 10 minute auction call period across the Exchanges order driven markets.

A list of the affected markets and the period schedules that will be invoked are listed below.

Market Segments that will have an auction call period invoked

SET1 SET2
STMM SET3
SETN SMKT
ETFS IOB
HKOB CWTS
ITBB AIMN
EURT TEST
ODTT

Temporary period that will be invoked to open market segment

LONDON MARKETS (LSE)
Segment Period Rules Time
SET1 POBT 13.50
SET2 POBT 13.50
SET3 POBT 13.50
STMM POBT 13.50
ETFS POBT 13.50
IOB POBT 13.50
HKOB POBT 13.50
CWTS PMCP 13.50
ITBB IBPT 13.50
AIMN OETY 13.50
SETN OETY 13.50

JSE
Segment Period Rule Time
ZA01 OPAC 15:50 (SAST)
ZA02 OPAC 15:50 (SAST)
ZA03 OPC2 15:50 (SAST)
ZA04 OPC2 15:50 (SAST)
ZA11 OPC2 15:50 (SAST)

Segment Period Rules Time
ZA01 COT 16:00 (SAST)
ZA02 COT 16:00 (SAST)
ZA03 COT3 16:00 (SAST)
ZA04 COT3 16:00 (SAST)
ZA11 COT3 16:00 (SAST)

Trading can continue in these segments away from Automatic Execution. Any Market Maker quotes which remain in the Trading System will be indicative.


If you have any queries please contact your Account Manager or the Technical Information Desk on 020 7797 3933 (STX 33939).

An archive of previously issued announcements is available in the technical library section of the Exchanges Internet site (www.londonstockexchange.com/techlib).