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We investigate the risk effects of bank acquisitions of insurance companies and securities firms between 1991 and 2012 using a newly constructed dataset of MandA deals. We examine risk changes before and after deal announcements by decomposing risk into systematic and idiosyncratic components. Subsequently, we investigate the relationship between risk and diversification by modelling the determinants of risks. We find that bank combinations with securities firms yield higher risks than combinations with insurance companies. Bank size is an important and consistent determinant of risk whereas diversification is not. Our results inform the continuing debate on diversification versus functional separation of bank activities.


  • Banks, Nonbank Financial Firms, FInancial Conglomerates, Diversification, Risk Decomposition, Determinants of Risk
Original languageEnglish
Pages (from-to)235-275
JournalEuropean Financial Management
Issue number2
Early online date17 Mar 2015
Publication statusPublished - 1 Mar 2016
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