The purpose of the article is to study the difference between the informational efficiency levels between the emerging and developed markets. We applied the symbolic time series analysis approach and the Shannon entropy in order to measure and rank the informational efficiency of 20 stock...

Routinely, practictioners and academics alike propose the use of trading strategies with an alleged improvement on the risk-return relation, tipically entailing a considerably higher return for the given level of risk. A very popular example is "A quantitative approach to tactical asset...