“…The design of many stock market trading systems based on synthesis of fuzzy logic and the rule-base evidential reasoning methods of Dempster (1968) and Shafer (1976) has produced ample evidence of predictability in price movements (see, e.g., Chang and Liu (2008), Dymova, Sevastianov and Bartosiewicz (2010), Boyacioglu and Avci (2010), Dymova, Sevastianov and Kaczmarek (2012), Escobar, Moreno and Múnera (2013), Chourmouziadis and Chatzoglou (2016), Chang, Wu and Lin (2016) or Rubell and Jessy (2016), among others). The empirical results on the performance of this type of stock trading expert systems suggests that financial markets function consistently with the Adaptive Markets Hypothesis (AMH) proposed by Lo (2004 and2005), according to which the market efficiency phenomenon tends to evolve over time, and the predictability of stock prices can arise periodically depending on evolving market conditions and agent behaviour (see, e.g., Urquhart andMcGroarty (2014 and or Manahov and Hudson (2014), among others).…”