Footnote:
Nach Informationen von SSRN wurde die ursprüngliche Fassung des Dokuments September 18, 2017 erstellt
Description:
We present a modelling approach for sector asset pricing studies that incorporates sector-level risk factors, sub-group portfolios, and structural break point tests that are better at isolating the time-varying nature and the firm-specific component of returns. The sub-group portfolios show considerable subsector heterogeneity, while the asset pricing model using local risk factors and inductive structural breaks results in a superior model (R2 of 80.42% relative to R2 of 68.79% of ‘conventional' models). Finally, we show that 28% of the variance of residuals, normally assumed to be the firm-specific component of returns, can be attributed to the changing relationship between sector returns and risk premia