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Short selling and product market competition

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  • Matta, Rafael
  • Rocha, Sergio H.
  • Vaz, Paulo

Abstract

We empirically investigate how short selling affects firms’ product market performance via a managerial monitoring channel. Using both historical data and exogenous shocks to short selling, we find robust evidence that short interest negatively impacts market shares, especially in large firms. Our Reg SHO results are stronger in concentrated industries and industries where firms compete in strategic substitutes. Further tests show that these effects are driven by low ex-ante stock price informativeness. The evidence suggests that the interaction between market power and price opacity generates incentives for overproduction, which short selling attenuates. Our results support policies that facilitate price discovery in the presence of market power.

Suggested Citation

  • Matta, Rafael & Rocha, Sergio H. & Vaz, Paulo, 2025. "Short selling and product market competition," Journal of Banking & Finance, Elsevier, vol. 171(C).
    • Handle: RePEc:eee:jbfina:v:171:y:2025:i:c:s0378426624002498
    DOI: 10.1016/j.jbankfin.2024.107335
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    More about this item

    Keywords

    Short sales; Product market competition; Financial feedback; Price informativeness;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G23 - Financial Economics - - Financial Institutions and Services - - - Non-bank Financial Institutions; Financial Instruments; Institutional Investors
    • G34 - Financial Economics - - Corporate Finance and Governance - - - Mergers; Acquisitions; Restructuring; Corporate Governance
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

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