List of Articles ابهام اطلاعاتی Open Access Article Abstract Page Full-Text 1 - Investors ' Trading Behavior in stock Market Under Information Ambiguity Formality of Hearding Behavior hosein Arani Mohammad reza vatanparast Farzin Rezaei sina kherdyar Open Access Article Abstract Page Full-Text 2 - Information ambiguity and its effect on stock price synchronicity during the life cycle stages of companies Gholamreza Askarzadeh Omid Kargarshooroki