Efeitos das intervenções na taxa de câmbio: o caso brasileiro de 1999 a 2008

AUTOR(ES)

Felipe Wolk Teixeira

DATA DE PUBLICAÇÃO

2009

RESUMO

This study emcompasses an analysis of the Brazilian foreign exchange interventions from the year 1999 to 2008 and their effects on the R$/US$ exchange rate. The objective was to verify if the foreign exchange interventions had any significant impact on the exchange rate behavior. The interventions were analyzed with different methods such as an event-study approach, dummy models, GARCH and EGARCH estimations; these estimations were based on both daily and monthly data samples. The interventions on the Spot market appear to have had an effect on the foreign exchange behavior in the days right after these interventions were made; as for swaps and bonds, the results indicate the existence of lagged effects. Estimations with EGARCH models point the existence of asymmetry between interventions causing positive and negative shocks on conditional variance: interventions that generate positive shocks have a larger effect on the conditional variance than interventions generating negative shocks. The results strongly indicate the possibility of an endogeneity issue: the foreign exchange intervention could be tied to the foreign exchange trend, this leads to episodes that the foreign exchange interventions arent strong enough to surpass the trend effects.

ASSUNTO(S)

economia dolar cambio - taxas - brasil

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