CAPM extensions in the German stock market
- This paper prices risk factors in the Capital Asset Pricing Model (CAPM) to
explain portfolio returns of the German stock market. Using a two-part
regression procedure, we show that beta exhibits slight significance in
capturing the variations of asset returns. When higher co-moments and Fama
French factors are added to the model, we find a moderate improvement in the
significance levels of all risk factors and in the overall explanatory power of
the model. Moreover, following the conditional beta method employed in
Pettengill et al. (1995), we show that risk factors perform fairly well in crosssection
settings, especially in the down-market condition. Our chosen long
time horizon shows that the composite model with all factors included
performs better in post-recession periods.