July 14 (SeeNews) - Fitch Ratings said it affirmed the long-term issuer default ratings (IDRs) of Raiffeisenbank (Bulgaria) at 'BBB-' with a negative outlook, and of First Investment Bank (FIBank) at 'B-' with a stable outlook while upgrading the long-term IDR of United Bulgarian Bank (UBB) to 'B+' from 'B' with a stable outlook.