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Int. J. Financial Stud. 2018, 6(3), 63; https://doi.org/10.3390/ijfs6030063

Bank Interest Margin, Multiple Shadow Banking Activities, and Capital Regulation

1
Department of International Business, Tamkang University, New Taipei City 25137, Taiwan
2
School of Economics, Southwestern University of Finance and Economics, Chengdu 611130, China
3
Department of Management Sciences, Tamkang University, New Taipei City 25137, Taiwan
*
Author to whom correspondence should be addressed.
Received: 6 June 2018 / Revised: 6 June 2018 / Accepted: 26 June 2018 / Published: 3 July 2018
(This article belongs to the Special Issue Finance, Financial Risk Management and their Applications)
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Abstract

In this paper, we develop a contingent claim model to evaluate a bank’s equity and liabilities that integrates the premature default risk conditions with loan rate-setting behavioral mode and multiple shadow banking activities under capital regulation. The barrier options theory of corporate security valuation is applied to the contingent claims of a bank. The barrier reports that default can occur at any time before the maturity date. We focus on a type of earning-asset portfolio, consisting of balance-sheet banking activities of loans and liquid assets and shadow banking activities of wealth management products (WMPs) and entrusted loans (ELs). The optimal bank interest margin, i.e., the spread between the loan rate and the deposit rate, is derived and analyzed. The results provide an alternative explanation for the decline in bank interest margins, which better fits the narrative evidence on bank spread behavior under capital regulation in particular during a financial crisis. Raising either WMPs or ELs leads to a transfer of wealth from equity holders to the debt holders, and hence increases the deposit insurance liabilities. We also show that the multiple shadow banking activities of WMPs and ELs captured by scope equities may produce superior return performance for the bank. Tightened capital requirements may reinforce the superior return performance by a surge in shadow banking activities that makes the bank less prudent and more prone to risk-taking at a reduced margin, thereby adversely affecting banking stability. We demonstrate that financial disturbance may be created because of the potential for shadow banking activities to spill over to regular banking activities and damage the real economy. View Full-Text
Keywords: wealth management products; entrusted loans; bank interest margin; capital regulation wealth management products; entrusted loans; bank interest margin; capital regulation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lin, J.-H.; Chen, S.; Huang, F.-W. Bank Interest Margin, Multiple Shadow Banking Activities, and Capital Regulation. Int. J. Financial Stud. 2018, 6, 63.

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