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A New Variance Ratio Test of Random Walk in Emerging Markets: A Revisit
Author(s) -
AlKhazali Osamah M.,
Ding David K.,
Pyun Chong Soo
Publication year - 2007
Publication title -
financial review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.621
H-Index - 47
eISSN - 1540-6288
pISSN - 0732-8516
DOI - 10.1111/j.1540-6288.2007.00173.x
Subject(s) - nonparametric statistics , random walk , stock (firearms) , emerging markets , econometrics , variance (accounting) , economics , test (biology) , financial economics , statistics , mathematics , geography , accounting , finance , biology , paleontology , archaeology
Using a nonparametric variance ratio (VR) test, we revisit the empirical validity of the random walk hypothesis in eight emerging markets in the Middle East and North Africa (MENA). After correcting for measurement biases caused by thin and infrequent trading prevalent in nascent and small stock markets, we cannot reject the random walk hypothesis for the MENA markets. We conclude that a nonparametric VR test is appropriate for emerging stock markets, and argue that our findings can reconcile previously contradictory results regarding the efficiency of MENA markets.