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Asset pricing with index investing

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  • Chabakauri, Georgy
  • Rytchkov, Oleg

Abstract

We theoretically analyze how index investing affects financial markets using a dynamic exchange economy with heterogeneous investors and two Lucas trees. We identify two effects of indexing: lockstep trading of stocks increases market volatility and stock return correlations but reduction in risk sharing decreases them. Overall, indexing decreases market volatility but has an ambiguous effect on the correlations. Also, index investing decreases an investor's welfare, but indexing by other investors partially offsets the loss. When the introduction of index trading opens financial markets for new investors, the improved risk sharing makes market returns more volatile and stock returns more correlated.

Suggested Citation

  • Chabakauri, Georgy & Rytchkov, Oleg, 2020. "Asset pricing with index investing," LSE Research Online Documents on Economics 118895, London School of Economics and Political Science, LSE Library.
    • Handle: RePEc:ehl:lserod:118895
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    File URL: http://eprints.lse.ac.uk/118895/
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    References listed on IDEAS

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    Cited by:

    1. Jiang, Hao & Vayanos, Dimitri & Zheng, Lu, 2020. "Tracking biased weights: asset pricing implications of value-weighted indexing," LSE Research Online Documents on Economics 118847, London School of Economics and Political Science, LSE Library.

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    More about this item

    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets

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