Bangkok--13 Oct--Fitch Ratings Fitch Ratings (Thailand) Limited has today assigned PTT Public Company Limited (PTT) a National Long-term rating of ‘AAA(tha)’ to its new issuance of unsecured and unsubordinated debentures of up to THB8bn, from THB5bn. This rating action commentary updates the same published by the agency on 9 October 2008. Note to Editors: Fitch’s National ratings provide a relative measure of creditworthiness for rated entities in countries with relatively low international sovereign ratings and where there is demand for such ratings. The best risk within a country is rated ‘AAA’ and other credits are rated only relative to this risk. National ratings are designed for use mainly by local investors in local markets and are signified by the addition of an identifier for the country concerned, such as ‘AAA(tha)’ for National ratings in Thailand. Specific letter grades are not therefore internationally comparable. Contacts: Lertchai Kochareonrattanakul, Bangkok, +662 655 4760; Steve Durose, Sydney, +612 8256 0307; Vincent Milton, Bangkok, +662 655 4759. Fitch's rating definitions and the terms of use of such ratings are available on the agency's public site, www.fitchratings.com. Published ratings, criteria and methodologies are available from this site, at all times. Fitch's code of conduct, confidentiality, conflicts of interest, affiliate firewall, compliance and other relevant policies and procedures are also available from the 'Code of Conduct' section of this site.