Inefficiency in Latin-American market indices L. Zunino, B. M. Tabak, D. G. Pérez, M. Garavaglia and O. A. Rosso Eur. Phys. J. B, 60 1 (2007) 111-121 Published online: 23 November 2007 DOI: 10.1140/epjb/e2007-00316-y