Tests for weak form market efficiency in stock prices: Monte Carlo evidence
AbstractEfficiency in financial markets is tested by applying variance ratio (VR)tests, but unit root tests are also used by many, sometimes in addition to the VR tests. There is a lack of clarity in the literature about the implication of these test results when they seem to disagree. We distinguish between two different types of predictability, called "structural predictability" and "error predictability". Standard unit root tests pick up structural predictability. VR tests pick up both structural and error predictability.
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Bibliographic InfoPaper provided by Victoria University of Wellington, School of Economics and Finance in its series Working Paper Series with number 1993.
Date of creation: 2011
Date of revision:
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Postal: Alice Fong, Administrator, School of Economics and Finance, Victoria Business School, Victoria University of Wellington, PO Box 600 Wellington, New Zealand
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Unit Root; Weak Form Efficiency; Random Walk; Autocorrelation; Variance Ratio;
This paper has been announced in the following NEP Reports:
- NEP-ALL-2012-02-27 (All new papers)
- NEP-ECM-2012-02-27 (Econometrics)
- NEP-FMK-2012-02-27 (Financial Markets)
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