November 1 (SeeNews) - Fitch Ratings said it has affirmed the long-term issuer default ratings (IDR) of Turkish banks Isbank [BIST:ISATR], Garanti Bank [BIST:GARAN], Akbank [BIST:AKBNK] and Yapi Kredi Bank [BIST:YKBNK] at BBB with stable outlooks.