List of Articles Markov regime switching GARCH Open Access Article Abstract Page Full-Text 1 - Investigation of Weak Form Efficiency Hypothesis in Both High and Low Volatility Regimes of OPEC Crude Oil Market mahmood mohammadi alamuti mohammad reza haddadi younes nademi Open Access Article Abstract Page Full-Text 2 - The Relation Between one Economic Events with the Concepts of Changing Regime about Returns, Risk and Liquidity in Stock Market Hassan Ghalibafasl Naser Elahi Masoomeh Torkaman Ahmadi Yadolah Dadgar Open Access Article Abstract Page Full-Text 3 - Modeling and Forecasting Evaluation of Different Models of Short-Term Memory, Long-Term Memory, Markov Switching and Hyperbolic GARCH in Forecasting OPEC Crude Oil Price Volatility mahmood mohammadi alamuti Mohammadreza Haddadi Younes Nademi