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Does Bidder Complexity Affect Market Reactions to M&A Decisions?

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  • Rajib Chowdhury
  • John A. Doukas

Abstract

We examine whether and how bidder complexity influences investor reactions to merger and acquisition (M&A) announcements. Using an established measure of complexity, we find a significant positive relationship between acquiring firm complexity and cumulative abnormal returns (CAR). This suggests that investors perceive more complex firms as capable and value‐enhancing participants in M&A activities. The association is particularly strong for bidders with high operating risk, greater R&D intensity, and larger firm size. We also find that complex bidders tend to offer higher takeover premiums. Overall, our study contributes to the literature by demonstrating that bidder complexity is an important determinant of market reactions to M&A announcements.

Suggested Citation

  • Rajib Chowdhury & John A. Doukas, 2026. "Does Bidder Complexity Affect Market Reactions to M&A Decisions?," International Review of Finance, International Review of Finance Ltd., vol. 26(1), March.
    • Handle: RePEc:bla:irvfin:v:26:y:2026:i:1:n:e70066
    DOI: 10.1111/irfi.70066
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