“…However, stock market efficiency is formulated through efficiency of those companies, institutions, and financial instruments that exist inside the financial market (Trabelsi Mnif, 2015). (Elroukh, 2024& Hong et al, 2021 also insists that stock markets efficiency is considered as one of controversial topics that arise among researchers interested in finance & investment discipline. Although it is not a new topic, its results differ from one market to another, or even for the same market from one period to another.…”