The study investigated the effect of managerial overconfidence on corporation risks within the moderator role of board governance in Brazil, Egypt, India, Russia, Saudi Arabia, South Africa, and Turkey as emerging markets. The study sample consisted of 70 non-financial corporations during the period from 2013 to 2022. “Operational leverage," “Financial leverage," and “total leverage" were estimated as measurements of corporate risk. On the other hand, “the number of board members," "separation of the chairman of the board governance and the chief executive officer (CEO)," “the number of non-executive board members", “the number of independent board members", and “board meets" as measurements of board governance. Managerial overconfidence was the construct variable based on overinvestment in the corporation's total assets. According to cross-sectional data analysis, there is an increase in the adjusted R-squared of managerial overconfidence with all types of corporations' risk when adding board governance as the moderating variable. The study concluded that board governance as the moderating variable has contributed positively to explaining the corporation's risks within the managerial overconfidence of the CEO in emerging markets.