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Is the Polish stock market weak form efficient?
Slawomir, Pijanowski1.
This paper explores the definition of predictability of Warsaw Stock Index returns by using measures elaborated in Shannon-Mazur's cybernetic information theory, potentially a new approach to understand capital market informational efficiency. The main message of this research is that the use of information theory methods may shed new light on the applicability of weak- form efficiency tests and the phenomenon of return unpredictability. Cybernetic interpretation of predictability enables more refined and precise statistical interpretation in answering the question about market returns predictability and, in retrospect, may contribute to the discussion on the predictability tests of market returns.
Affiliation:
- Poznan University of Economics, Poland
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