Theories of bank behavior under capital regulation

This paper reviews academic studies of bank capital regulation in an effort to evaluate the intellectual foundation for the imposition of the Basel I and Basel II systems of risk-based capital requirements. The theoretical literature yields general agreement about the immediate effects of capital requirements on bank lending and loan rates and the longer-term impacts on bank ratios of equity to total or risk-adjusted assets. This literature produces highly mixed predictions, however, regarding the effects of capital regulation on asset risk and overall safety and soundness for the banking system as a whole. Thus, the intellectual foundation for the present capital-regulation regime is not particularly strong. The mixed conclusions in the academic literature on banking certainly do not provide unqualified support for moving to an even more stringent and costly system of capital requirements. These widely ambiguous results do suggest, however, that assessing the implications of capital regulation for balance-sheet risk and monitoring effort in diverse banking systems is an important agenda for future theoretical research in the banking area.     

Information sharing,credit booms and financial stability: Do developing economies differ from advanced countries?

This paper analyses the impact of credit information sharing on financial stability, drawing special attention to its interactions with credit booms. A probit estimation of financial vulnerability episodes—identified by jumps in the ratio of non-performing loans to total loans—is run for a sample of 159 countries divided into two sub-samples according to their level of development: 80 advanced or emerging economies and 79 less developed countries. The results show that: i) credit information sharing reduces financial fragility for both groups of countries; ii) for less developed countries, the main effect is the direct effect (reduction of NPL ratio once credit boom is controlled), suggesting a portfolio quality effect; iii) credit information sharing also mitigates the detrimental impact of a credit boom on financial fragility but this result holds only for advanced and emerging countries and for household credit booms; and iv) the depth of information sharing has a negative impact on the likelihood of credit booms (but not the coverage of IS).     

Sub-debt Yield Spreads as Bank Risk Measures

Several recent studies have recommended greater reliance on subordinated debt as a tool to discipline bank risk taking. Some of these proposals recommend using sub-debt yield spreads as triggers for supervisory discipline under prompt corrective action (PCA). Currently such action is prompted by capital adequacy measures. This paper provides the first empirical analysis of the relative accuracy of various capital ratios and sub-debt spreads in predicting bank condition: measured as subsequent CAMEL or BOPEC ratings. The results suggest that some of the capital ratios, including the summary measure used to trigger PCA, have almost no predictive power. Sub-debt yield spreads performed slightly better than the best capital measure, the Tier-1 leverage ratio, albeit the difference is not significant. The performance of sub-debt yields satisfies an important pre-requisite for using sub-debt as a PCA trigger. However, the prediction errors are relatively high and further work to refine the measures would be desirable.     

The Comprehensive Assessment: What lessons can be learned?

Analysing the database made available by the European Central Bank and by the European Banking Authority, we evaluate the Comprehensive Assessment (CA) (Asset Quality Review and Stress Test (ST)) of banks carried out in 2014. In a nutshell, the main results are: (i) risk-adjusted capital ratios are negatively related to the Asset Quality Review shortfall, but not to the ST shortfall, whereas the leverage ratio plays a significant role in both cases; (ii) the CA predominantly concentrated on traditional credit activity rather than on banks’ financial assets and (iii) the CA seems to be characterized by double standards. The Asset Quality Review was severe with banks operating in non-core countries, while medium-sized banks were either riskier or were treated severely in both exercises. The analysis leads to a puzzle: comparatively, the assessment per se led to significant adjustments for solid banks and large shortfalls for weak banks. The puzzle can be resolved by referring to the legacy of the country’s former supervisory activity and to the low level of capitalization of weak banks mostly in peripheral countries.

Abbreviations: ADJ_AQR: adjustment due to the AQR; ADJ_ST: adjustment due to the ST adverse scenario; AQR: asset quality review; bps: basis points (1?bp is equal to 0.01%); bn: billion; CA: comprehensive assessment; CET1: common equity tier 1; CR: coverage ratio; CRD/CRR: capital requirements directive/capital requirements regulation; CVA: credit valuation adjustment; EBA: European Banking Authority; ECB: European Central Bank; LM test: Lagrange-multiplier test; NPE: Non-performing exposure; RWA: risk-weighted asset; SF_AQR: shortfall due to the AQR; SF_ST: shortfall due to the ST adverse scenario; SREP: supervisory review and evaluation process; SSM: single supervisory mechanism; ST: stress test; tr: trillion (one thousand of billions)     

An Analysis of European Banks' SND Issues and its Implications for the Design of a Mandatory Subordinated Debt Policy

During the last twenty years an increasing number of proposals to improve bank market discipline through the introduction of a mandatory subordinated debt policy (MSDP) have been presented and critically discussed by academic economists and bank regulators. While theoretical issues are key in this debate, a proper understanding of the market for banks' subordinated notes and debentures (SND) and the main features of securities is also considered relevant for the potential introduction, design and goals setting of such a policy. This paper builds on information concerning issuers, investors, markets, pricing and the technical features of securities to critically discuss these aspects. Data on over 1800 European banks SND issues completed during the 1988–2000:Q1 period together with information on primary and secondary market functioning are presented.     

Credit Card Securitization and Regulatory Arbitrage

This paper explores the motivations and desirability of off-balance sheet financing of credit card receivables by banks. We explore three related issues: the degree to which securitizations result in the transfer of risk out of the originating bank, the extent to which securitization permits banks to economize on capital by avoiding regulatory minimum capital requirements, and whether banks' avoidance of minimum capital regulation through securitization with implicit recourse has been undesirable from a regulatory standpoint. We show that regulatory capital arbitrage is an important consequence of securitization. The avoidance of capital requirements could be motivated either by efficient contracting or by safety net abuse. We find that securitizing banks set their capital relative to managed assets according to market perceptions of their risk, and seem not to be motivated by maximizing implicit subsidies relating to the government safety net when managing their risk. This evidence is more consistent with the efficient contracting view of securitization with implicit recourse than with the safety net abuse view.     

Regulatory Capital Arbitrage and the Potential Competitive Impact of Basel II in the Market for Residential Mortgages

U.S. banking regulators have proposed a bifurcated system of capital regulation where the largest, internationally active banking organizations would be subject to significantly more risk sensitive regulatory capital requirements than are currently in place, while most others would remain subject to the current rules. The proposed new capital regime has the potential to affect the competitive landscape among banking institutions, particularly in the area of residential mortgage lending. We analyze the potential competitive effects of the proposed, bifurcated regulatory capital system on competition in the residential mortgage market from the perspective of the theory of regulatory capital arbitrage. We then apply the theory and available evidence to perform some benchmark calculations that suggest a significant, potential shift of market share and income to the largest banking institutions in the mortgage market.

新型货币政策担保品框架的绿色效应

本文以2018年6月我国央行开始接受绿色信贷资产作为MLF合格担保品这一事件为准自然实验,运用双重差分模型分析我国新型货币政策的担保品扩容对绿色信贷企业融资的影响。研究结果表明:第一,将绿色信贷资产纳入央行合格担保品范围增加了绿色信贷企业的信贷可得性,并降低了绿色信贷企业的信贷成本;第二,企业的异质性分析表明,民营绿色信贷企业在融资可得性方面对政策反应更显著,国有绿色信贷企业在融资成本方面对政策反应更显著;第三,分行业的扩展性检验表明,央行合格担保品扩容政策对于环保行业的绿色信贷企业主要通过提高融资可得性发挥作用,而对于重污染行业的绿色信贷企业则主要作用于其信贷融资成本。基于以上实证结果,本文认为央行担保品扩容具有绿色效应,可综合运用央行担保品框架和借贷便利类货币政策工具,加强我国新型货币政策的定向调控功能。