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) network exposures act as an inflating factor for systematic exposure to common factors and (ii) the power of diversification is reduced by the presence of network connections. Moreover, we show that in the presence of network links a misspecified traditional linear factor model presents residuals that are correlated and heteroskedastic. We support our claims with an extensive simulation experiment

The Impact of Network Connectivity on Factor Exposures, Asset Pricing and Portfolio Diversification

Billio, Monica
Membro del Collaboration Group
;
Caporin, Massimiliano
Membro del Collaboration Group
;
Panzica, Roberto
Membro del Collaboration Group
;
Pelizzon, Loriana
Membro del Collaboration Group
2016

Abstract

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) network exposures act as an inflating factor for systematic exposure to common factors and (ii) the power of diversification is reduced by the presence of network connections. Moreover, we show that in the presence of network links a misspecified traditional linear factor model presents residuals that are correlated and heteroskedastic. We support our claims with an extensive simulation experiment
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10278/3708101
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