[Tunis Afrique Presse] Tunis/Tunisia -- Moody's Investors Service (Moody's), on October 20, 2021, downgraded the long-term bank deposit ratings to Caa1 from B3 of four Tunisian banks: Amen Bank (Amen), Arab Tunisian Bank (ATB), Banque de Tunisie (BT) and Banque Internationale Arabe de Tunisie (BIAT). The long-term deposit ratings of Société Tunisienne de Banque (STB) have been affirmed at Caa1, Moody's said in a statement.