A model that includes a factor that captures news related to future Gross Domestic Product (GDP) growth along with the market factor can explain the cross-section of equity returns about as well as the Fama-French model can. Furthermore, the Fama-French factors HML and SMB appear to contain mainly news related to future GDP growth. When news related to future GDP growth is present in the asset-pricing model, HML and SMB lose much of their ability to explain the cross-section.

We test whether the profitability of HML, SMB, and WML can be linked to future Gross Domestic Product (GDP) growth. Using data from ten countries, we find that HML and SMB contain significant information about future GDP growth. This information is to a large degree independent of that in the market factor. Even in the presence of popular business cycle variables, HML and SMB retain their ability to predict future economic growth in some countries. Our results support a risk-based explanation for the performance of HML and SMB. Little evidence is found to support such an explanation in the case of WML.