The Martingale hypothesis in the Mexican stock market

  • Nadiezhda de la Uz Instituto Tecnológico y de Estudios Superiores de Monterrey
Keywords: Martingala hypothesis, Martingala, stock market, Mexico
JEL Classification: G14, G15


We examine the martingale hypothesis for the Mexican stock market during the period 1993 - 2000. This research includes 97% of all securities with medium and high trading frequency. The proposed tests are robust when dealing with non normal and heteroskedastic data. The tests use the fact that the variances from continuously compounded returns are lineal in time. The hypothesis is not rejected for the main Mexican stock indexes (the IPC and the INMEX). For individual stocks we find that in 70% of the examined cases, the hypothesis is not rejected. Finally, we include proofs of long- range independence, which are required for the derivation of the relevant statistics.


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How to Cite
de la UzN. (2002). The Martingale hypothesis in the Mexican stock market. Estudios Económicos, 17(1), 91-127.
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