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

Author

Listed:
  • Billio, Monica
  • Caporin, Massimiliano
  • Panzica, Roberto Calogero
  • Pelizzon, Loriana

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.

Suggested Citation

  • Billio, Monica & Caporin, Massimiliano & Panzica, Roberto Calogero & Pelizzon, Loriana, 2017. "The impact of network connectivity on factor exposures, asset pricing and portfolio diversification," SAFE Working Paper Series 166, Research Center SAFE - Sustainable Architecture for Finance in Europe, Goethe University Frankfurt.
  • Handle: RePEc:zbw:safewp:166
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    Keywords

    CAPM; volatility; network; interconnections; systematic risk;

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • F35 - International Economics - - International Finance - - - Foreign Aid
    • C58 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Financial Econometrics

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