National Bank of Greece S. A. - Mortgage Covered Bonds 2 -- Moody's upgrades National Bank of Greece S. A. - Mortgage Covered Bonds 2 Read full article Oops! Rating Action: Moody's upgrades National Bank of Greece S. A. - Mortgage Covered Bonds 2Global Credit Research - 12 Mar 2021Madrid, March 12, 2021 -- Moody's Investors Service ("Moody's") has today upgraded to A3 from Baa1 the rating of the covered bond issued by National Bank of Greece S.A. (NBG or the issuer) (deposits Caa1 stable, adjusted baseline credit assessment caa1, counterparty risk (CR) assessment B1(cr)) under its Mortgage Co...