Overconfidence Bias and Firm Market Value: The Mediating Role of Stock Return Volatility – Evidence from the Nairobi Securities Exchange
This study examines the effect of overconfidence bias on firm market value and the mediating role of stock return volatility in this relationship among firms listed on the Nairobi Securities Exchange (NSE) over the period 2016 - 2025. Despite growing evidence from developed markets, limited empirical research exists on...