Routinely, practictioners and academics alike propose the use of trading strategies with an alleged improvement on the risk-return relation, tipically entailing a considerably higher return for the given level of risk. A very popular example is "A quantitative approach to tactical asset...

This paper extends the classic factor-based asset pricing model by including network linkages in linear factor models. We assume that the network linkages are exogenously provided. This extension of the model allows a better understanding of the causes of systematic risk and shows that (i)...