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BOI and AIB upgrade

RATING agency Fitch has upgraded Bank of Ireland and AIB's 'viability ratings' -- but cut the same rating for Permanent TSB.

Viability ratings are one of the measures considered in the main issuer default ratings of the banks and are based on the stand-alone credibility of each bank.

Fitch raised the viability rating for Bank of Ireland by one notch to B. The rating for AIB was raised to B-.