MONTERREY, Mexico--(BUSINESS WIRE)--Fitch Ratings has affirmed the City of Buenos Aires's (CBA) ratings as follows: --Long-term and local currency Issuer Default Rating (IDR) at 'CCC'; --Short-term and local currency IDR at 'C'; --Euro medium-term note programme (EMTN) up to USD2.29 billion long-term rating at 'CCC'; --Series 10 for USD415 million long-term rating at 'CCC'; --Series 11 for USD500 million long-term rating at 'CCC'; --Programme of short-term treasury bills up to ARP950 million sh