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Comovement and investment banking networks

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  • Grullon, Gustavo
  • Underwood, Shane
  • Weston, James P.

Abstract

We test the hypothesis that investment banking networks affect stock prices and trading behavior. Consistent with the notion that investment banks serve as information hubs for segmented groups of investors, the stock prices of firms that use the same lead underwriter during their equity offerings tend to move together. We also find that when firms switch underwriters between their initial public offering (IPO) and a seasoned equity offering (SEO), they comove less with the stocks associated with the old bank and more with the stocks associated with the new bank. This change in comovement is greater for stocks completing their first SEO and for those experiencing large changes in institutional ownership.

Suggested Citation

  • Grullon, Gustavo & Underwood, Shane & Weston, James P., 2014. "Comovement and investment banking networks," Journal of Financial Economics, Elsevier, vol. 113(1), pages 73-89.
    • Handle: RePEc:eee:jfinec:v:113:y:2014:i:1:p:73-89
    DOI: 10.1016/j.jfineco.2014.02.010
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    8. James, Kevin R. & Valenzuela, Marcela, 2019. "The efficient IPO market hypothesis: theory and evidence," LSE Research Online Documents on Economics 118934, London School of Economics and Political Science, LSE Library.
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    10. Do, Hung X. & Nguyen, Nhut H. & Nguyen, Quan M.P., 2022. "Multinationals and stock return comovement," Global Finance Journal, Elsevier, vol. 52(C).
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    More about this item

    Keywords

    Investment banking; Networks; Seasoned equity offering; Trading;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage

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