After the successful mock trading yesterday, the Athens Exchange (ATHEX) decided to operate in the OASIS trading sub-system the new version (version 1.8), which provides the new functional characteristics that were tried during the two mock trading sessions of December 2004.

The new functional characteristics of the OASIS shares sub system, even though will be available in the production system as of today, i.e. Thursday, December 30, 2004 they will not be able to be used by the OASIS users. It is clearly specified that the precise date of their activation will be announced by the ATHEX with a special announcement, which is related with the time of the publication in the Official Government Gazette of the approved decisions of the Hellenic Capital Market Commission on the changes of the ATHEX Regulation.

More specifically the ATHEX announces herewith that on 3/1/2005, the following functional characteristics will be activated in the OASIS shares? sub system:

1. For the shares under a continuous trading status (5 hours, 3 hours, New Market, and the Greek Market for Emerging Capital Markets), the maximum limit of the daily fluctuation of their prices is escalated. The price?s first trading limit is ±10% on the reported price. Also, provided that buying or selling orders at the minimum limit remain unexecuted in the best buying or selling prices for 15 minutes, the daily trading limit is extended to ±20%, respectively. The above extension does not apply for the shares that are listed on the FTSE/ASE 20 Index, which after exceeding the first trading limit can fluctuate unlimitedly. For the shares under a call auction trading status (Auction B and Auction C), the trading limits remain at ±12%.

2. Extension by 15 minutes of the trading session of the cash market of the periods T3 (pre-agreed transactions period ? block trades) and ''TClose'' (transactions At the Close) as follows:

i)The period T3 begins at 11:00am and expires at 16:25

ii) The period T close begins at 16:00 and ends at 16:30.