Abstract
This paper uses panel data estimation under the assumptions of the agency theory of insider trading to identify the factors enhancing bank insider trading. We conclude that the more entrenched the directors, the less prestigious the bank, the bigger the firm and the lower the charter values for high levels of ownership, the higher the intensity of insider trading activity. Thus, the emerging picture is of a scenario where insider trading activity is triggered by the absence of efficient control mechanisms, either external (regulators control the level of bank capitalization but it is not easy for them to also control other opportunistic behaviors) or internal (shareholders fail to control managers when managers’ stakes are very low or very high).
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Acknowledgments
Part of this research was undertaken while one of us was visiting the University Carlos III (Madrid) & the University of Piura. Research Agency of the Spanish Ministry of Economics and Competitiveness (Grants ECO2013-4561P and ECO2016-75631P).
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Appendix
Appendix
Variables | Description | Measurement |
---|---|---|
LNSVI it | Insider trading intensiveness | Absolute value of the logarithm conversion of the SNVI index, measured as the net euro volume of insider purchases standardized by the earnings-per-share ratio |
IO it | Insider ownership | Percentage of shares in the hands of bank directors |
IO it 2 | Quadratic insider ownership | Square of insider ownership |
CV it | Charter value | Tobin’s Q |
BC it | Bank capital | Ratio of excess equity to total assets |
REPU it | Reputation | Dummy variable that takes the value of 1 for Spanish banks ranking among the first 2000 firms within the Forbes Global 2000, and takes the value of zero, otherwise |
SIZE it | Bank size | Natural logarithm of the market value of outstanding firms |
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del Brio, E.B., Perote, J., de Miguel, A., Gómez, G. (2018). Insider Trading and Corporate Governance in the Banking Sector. New Lessons on the Entrenchment Effect. In: Díaz Díaz, B., Idowu, S., Molyneux, P. (eds) Corporate Governance in Banking and Investor Protection. CSR, Sustainability, Ethics & Governance. Springer, Cham. https://doi.org/10.1007/978-3-319-70007-6_10
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