ISTANBUL (Turkey), June 25 (SeeNews) – Fitch Ratings said on Wednesday it has downgraded TIB Diversified Payment Rights Finance Company's (TIB DPR), Garanti Diversified Payment Rights Finance Company's (Garanti DPR), A.R.T.S. Ltd's (ARTS) and Yapi Kredi Diversified Payment Rights Finance Company Ltd's (Yapi Kredi DPR) series to A- from A with a stable outlook.