Our paper analyzes the performance of different methods to adjust beta. Specifically, we compare the standard OLS regression method with the Blume and the t-distribution methods from the point of view of reference-day risk. Our results indicate that the t-distribution method minimizes the...

Reference-day risk has been previously identified as a type of sampling variation phenomenon, and its effect on the estimation of stock returns and their volatility and market betas have been documented. Using a dataset of daily equity mutual fund returns, we extend previous studies to analyze...