Submitted by Miguel de Campos Pinto Coelho (miguelpintocoelho@gmail.com) on 2016-03-01T02:08:17Z No. of bitstreams: 1 2015-16_S2-932304-Miguel_Pinto_Coelho.pdf: 1544988 bytes, checksum: 0410eb0c13fc1b0030abc341426188b1 (MD5) / Approved for entry into archive by Ana Luiza Holme (ana.holme@fgv.br) on 2016-03-01T12:28:51Z (GMT) No. of bitstreams: 1 2015-16_S2-932304-Miguel_Pinto_Coelho.pdf: 1544988 bytes, checksum: 0410eb0c13fc1b0030abc341426188b1 (MD5) / Made available in DSpace on 2016-03-01T13:13:25Z (GMT). No. of bitstreams: 1 2015-16_S2-932304-Miguel_Pinto_Coelho.pdf: 1544988 bytes, checksum: 0410eb0c13fc1b0030abc341426188b1 (MD5) Previous issue date: 2016-01-18 / This project investigates if there was any influence of credit rating agencies and long-term government bond yields on each other before, during and after Europe’s sovereign debt crisis. This is addressed by estimating the relationship and causality between sovereign debt ratings or bond yields and macroeconomic and structural variables following a different procedure to explain ratings and bond yields. It is found evidence that, in distressed periods, ratings and yields do affect one another. This suggests that a rating downgrade might create a self-fulfilling prophecy, leading relatively stable countries to default. / Neste projeto, investigamos se as agências de rating e as taxas de juro de longo prazo da dívida soberana tiveram uma influência recíproca antes, durante e após a crise da dívida soberana Europeia. Esta análise é realizada, estimando a relação existente entre os ratings da dívida soberana ou taxas de juro e factores macroeconomicos e estruturais, através de uma diferente aplicação de metodologias utilizadas para este efeito. Os resultados obtidos demonstram que, no período da crise soberana, os ratings e as taxas de juros tiveram um mútuo impacto, sugerindo que as descidas dos ratings podem ter conduzido a profecias auto-realizáveis, levando países relativamente estáveis a um eventual incumprimento