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Short-sale constraints, information acquisition, and asset prices

Author

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  • Nezafat, Mahdi
  • Schroder, Mark
  • Wang, Qinghai

Abstract

During financial crises, financial market regulators often restrict short-selling to support prices and curb volatility. However, evidence suggests that short-selling bans during the turmoil in financial markets in 2007–2009 failed to achieve regulators' goals. We analyze a model of costly private information acquisition and asset pricing under short-sale constraints to examine a possible cause of this failure. We show that the constraints increase return volatility by adversely affecting the production of private information. When investors are highly risk averse or are holding highly correlated risky assets, the distortion in private information production arising from imposing short-sale constraints leads to undervaluation, implying that imposing short-selling bans during economic crises not only fails to curb volatility but also may fail to support prices.

Suggested Citation

  • Nezafat, Mahdi & Schroder, Mark & Wang, Qinghai, 2017. "Short-sale constraints, information acquisition, and asset prices," Journal of Economic Theory, Elsevier, vol. 172(C), pages 273-312.
  • Handle: RePEc:eee:jetheo:v:172:y:2017:i:c:p:273-312
    DOI: 10.1016/j.jet.2017.09.007
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    References listed on IDEAS

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    Cited by:

    1. Khrennikova, Polina & Patra, Sudip, 2019. "Asset trading under non-classical ambiguity and heterogeneous beliefs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 521(C), pages 562-577.

    More about this item

    Keywords

    Return volatility; Short-selling bans; Information production; Asset prices; Rational expectations;

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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