This study examines the effect of the COVID-19 pandemic on the relationship between idiosyncratic volatility and expected stock returns. Using daily stock return data in the US market from the Center for Research in Security Prices (CRSP), we estimate monthly idiosyncratic volatility and...

Return is the most fundamental concept in investment. There are two methods to measure returns: Arithmetic return and geometric return. The standard investment theory, Markowitz portfolio theory and CAPM, uses arithmetic return. Geometric return provides more accurate and precise measurement of...

The Black-Scholes option theory provides a simple analytical model about the yields of corporate bonds. We extend the theory to model the yields of default free government bonds from a simple observation. From the purchasing power perspective, the values of corporate and government bonds follow...