...+ On Nov. 2, 2015, National Bank of Greece S.A. (NBG) launched a tender offer to exchange securities from holders of its Tier 1 debt, Tier 2 debt, and senior debt instruments with equity. + The combined amount of the securities subject to the offer constitute most of the outstanding financial obligations on NBG's balance sheet, excluding customer deposits. + We consider the offer to be a distressed exchange under our criteria. + We are therefore lowering the rating on NBG to 'D' (default) from '##' (selective default). NEW YORK (Standard & Poor's) Nov. 4, 2015--Standard & Poor's Ratings Services said today that it lowered its long-term counterparty credit rating on National Bank of Greece S.A. to 'D' from '##'. We also lowered our issue ratings on the bank's senior unsecured debt to 'D' from '###-' and our subordinated debt ratings to 'D' from 'C'. The downgrades follow NBG's launch on Nov. 2 of a tender offer to exchange securities from holders of its Tier 1 (T1) debt, Tier 2 debt, and...