Abdymomunov, Azamat; Morley, James - In: Applied Financial Economics 21 (2011) 19, pp. 1463-1478
We investigate time variation in Captial Asset Pricing Model (CAPM) betas for Book-to-Market (B/M) and momentum portfolios across stock market volatility regimes. For our analysis, we jointly model market and portfolio returns using a two-state Markov-switching process, with beta and the market...