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Journal of Banking & Finance Vol. 171 2025

Short selling and product market competition

Rafael Matta1; Sergio H. Rocha2; Paulo Vaz3

1 SKEMA Business School · 2 Monash University · 3 Universidade Federal de Pernambuco

open access

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.

DOI
10.1016/j.jbankfin.2024.107335
Volume
171
Pages
107335
Language
en
Sources
openalex crossref bibtex:phds-export.bib

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