...Support Drives Ratings: The Issuer Default Ratings (IDRs) and Support Ratings of Allianz Bank Bulgaria AD (ABB), ProCredit Bank (Bulgaria) EAD, Raiffeisenbank (Bulgaria) EAD and Societe Generale Expressbank AD are driven by support. The banks' IDRs and Support Ratings reflect Fitch Ratings' opinion of an extremely high (Expressbank) and high (the remaining banks) probability that they would be supported, if required, by their respective parents. The four banks are owned, respectively, by Allianz SE (AA-/Stable, 66% stake), ProCredit Holding AG & Co. KGaA (PCH; BBB/Stable, 100%), Raiffeisen Bank International AG (RBI; 100%) and Societe Generale S.A. (SocGen; A/Stable, 99.7%). Stable Outlooks: The Stable Outlook on the banks' Long-Term IDRs reflects our view that risks related to their parents' credit profiles are broadly balanced. Compressed Viability Ratings: The Viability Ratings (VRs) of all banks are compressed in the `bb' range. The higher VR of Raiffeisenbank reflects its superior...