This paper provides a systematic review of the weak-form market efficiency literature that examines return predictability from past price changes, with an exclusive focus on the stock markets. Our survey shows that the bulk of the empirical studies examine whether the stock market under study is or is not weak-form efficient in the absolute sense, assuming that the level of market efficiency remains unchanged throughout the estimation period. However, the possibility of time-varying weak-form market efficiency has received increasing attention in recent years. We categorize these emerging studies based on the research framework adopted, namely non-overlapping sub-period analysis, time-varying parameter model and rolling estimation window. An encouraging development is that the documented empirical evidence of evolving stock return predictability can be rationalized within the framework of the adaptive markets hypothesis.

The evolution of stock market efficiency over time: A survey of the empirical literature

Testing for predictability in equity returns for European transition markets

Dual long memory property in returns and volatility: Evidence from the CEE countries' stock markets

https://isiarticles.com/bundles/Article/pre/pdf/12738.pdf

Power arch modelling of the volatility of emerging equity markets

Hurst exponent behavior and assessment of the MENA stock markets efficiency

The paper analyzes the long memory property of stock index returns in 14 markets with diverse levels of development. While the sample includes the developed stock markets of Japan, UK and USA, it also includes, in addition to the emerging markets of Brazil, India and Mexico, those of eight Arab countries as benchmarks of thin markets with the aim of investigating the link between fractional integration dynamics in stock returns and the level of stock market development. Using parametric and semi-parametric estimation procedures, the results show that the property of long-range dependence in stock index returns tend to be associated with relatively thin stock markets. Evidence from the Arab countries seems to suggest that long-memory might also be linked to the peculiar characteristics and the environment within which each stock market operates.

Imed Limam

Papers

Is Long Memory a Property of Thin Stock Markets? International Evidence Using Arab Countries