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Revista Finanzas y Política Económica
versão impressa ISSN 2248-6046
Resumo
DUARTE DUARTE, JUAN BENJAMÍN; SIERRA SUAREZ, KATHERINE JULIETH e RUEDA ORTIZ, VÍCTOR ALFONSO. COMPARATIVE EFFICIENCY ANALYSIS BETWEEN BRAZIL, MEXICO AND THE UNITED STATES. Finanz. polit. econ. [online]. 2015, vol.7, n.2, pp.341-357. ISSN 2248-6046. https://doi.org/10.14718/revfinanzpolitecon.2015.7.2.7.
This article seeks to contrast the weak form efficiency of the Brazilian, US, and Mexican stock indexes, based on the assumption that an efficient market is not predictable. With this goal in mind, we assessed predictability using runs tests and automatic variance ratio, in the 1995-2014 period. The results shed light on the fact that, in recent years, stock markets in Brazil and Mexico have gone from being non-efficient to being efficient. In contrast, the United States shows predictability at different time intervals.
Palavras-chave : runs test; automatic variance ratio; market efficiency.