PET: Buy back stock

PETROSETCO will repurchase its shares from 05/29/2008 to 07/30/2008 as follows:

Stock symbol: PET

Volume registered to buy back: 1,000,000 shares

Number of treasury stock after trading: 1,000,000 shares

Trading methods: order matching and put through.

HoSE

>   VPL: Record date for ballot (23/05/2008)

>   SSI: Insider trading (23/05/2008)

>   Vinamilk to list in Singapore in H2 (23/05/2008)

>   Stock market may stay low until third quarter (23/05/2008)

>   USAID trains securities regulators (23/05/2008)

>   Lilama, SHB bank reach cooperation deal (23/05/2008)

>   TDH: Result of buying back stock (23/05/2008)

>   VIC: Insider Trading (23/05/2008)

>   BMC: The record date for share bonus (23/05/2008)

>   CII : Buy back stock (23/05/2008)