October 24 (SeeNews) - Global rating agency Standard & Poor's said on Friday it placed its 'BBB+/A-2' long-term and short-term counterparty credit ratings on the Bulgarian unit of Italian banking group UniCredit, UniCredit Bulbank, and its 'BBB/A-2' long- and short-term counterparty credit ratings on the Bulgarian arm of the National Bank of Greece (NBG), UBB, on CreditWatch with negative implications.