Browsing FGV EPGE - Ensaios Econômicos by Author "Torres, Ricardo"
Coelho, Cristiano Augusto Fernandes; Bonomo, Marco Antônio Cesar; Torres, Ricardo
2000-10-01We tested two versions of the random walk model for portfolios of Brazilian stocks. We found evidence of persistency in daily and weekly returns, rejecting the random walk models. Those evidences are weaker in recent ...