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The impact of network connectivity on factor exposures, asset pricing and portfolio diversification

Monica Billio (), Massimiliano Caporin (), Roberto Calogero Panzica and Loriana Pelizzon ()

No 166, SAFE Working Paper Series from Research Center SAFE - Sustainable Architecture for Finance in Europe, Goethe University Frankfurt

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.

Keywords: CAPM; volatility; network; interconnections; systematic risk (search for similar items in EconPapers)
JEL-codes: G10 G12 F35 C58 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-ore and nep-rmg
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:safewp:166

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