Market Structure, Capital Regulation and Bank Risk Taking

This paper discusses the effect of capital regulation on the risk taking behavior of commercial banks. We first theoretically show that capital regulation works differently in different market structures of banking sectors. In lowly concentrated markets, capital regulation is effective in mitigating risk taking behavior because banks’ franchise values are low and banks have incentives to pursue risky strategies in order to increase their franchise values. If franchise values are high, on the other hand, the effect of capital regulation on bank risk taking is ambiguous. We then test the model predictions on a cross-country sample including 421 commercial banks from 61 countries. We find that capital regulation is effective in mitigating risk taking only in markets with a low degree of concentration. The results remain robust after accounting for financial sector development, legal system efficiency, and for other country and bank-specific characteristics.     

Bank Loan Supply, Lender Choice, and Corporate Capital Structure

This paper explores the relevance of capital market supply frictions for corporate capital structure decisions. To identify this relationship, I study the effect on firms' financial structures of two changes in bank funding constraints: the 1961 emergence of the market for certificates of deposit, and the 1966 Credit Crunch. Following an expansion (contraction) in the availability of bank loans, leverage ratios of bank-dependent firms significantly increase (decrease) relative to firms with bond market access. Concurrent changes in the composition of financing sources lend further support to the role of credit supply and debt market segmentation in capital structure choice.     

Capital Requirements,Monetary Policy,and Aggregate Bank Lending: Theory and Empirical Evidence

Capital requirements linked solely to credit risk are shown to increase equilibrium credit rationing and lower aggregate lending. The model predicts that the bank's decision to lend will cause an abnormal runup in the borrower's stock price and that this reaction will be greater the more capital-constrained the bank. I provide empirical support for this prediction. The model explains the recent inability of the Federal Reserve to stimulate bank lending by increasing the money supply. I show that increasing the money supply can either raise or lower lending when capital requirements are linked only to credit risk.     

Jointly Optimal Regulation of Bank Capital and Liquidity

In an economy with financial frictions, banks endogenously choose excessive leverage and maturity mismatch in equilibrium, as they fail to internalize the risk of socially wasteful fire sales. Macroprudential regulators can achieve efficiency with simple linear constraints, which require less information than Pigouvian taxes. The liquidity coverage and net stable funding ratios of Basel III can implement efficiency. Additional microprudential regulation of leverage is required when bank failures are socially costly. Micro‐ and macroprudential rules are imperfect substitutes. Optimally, macroprudential policy reacts to systematic risk and credit conditions over the cycle, while microprudential policy reacts to systematic and idiosyncratic risk.     

资本监管与银行最优资本结构

资本监管已成为现代商业银行监管体系的核心,而现有研究对资本监管的重要性缺乏系统的理论研究。基于此,本文从MM理论出发,逐步分析并得出:银行自身经营的特殊性、银行作为一般企业所追求的企业价值最大化行为以及银行作为特殊企业所得到的银行安全网保护等因素使得银行形成不断提高最优资产负债率和降低资本充足率的内在机制,逐步分析不同情形下的银行最优资本结构,进而说明资本监管对于维系银行经营的稳健性和审慎性以及减少银行破产而导致的负外部性等方面的重要作用。     

Effects of the New Basel Capital Accord on Bank Capital Requirements for SMEs

Using data from three countries (US, Italy and Australia) and surveying related studies from several other countries in Europe, we investigate the effects of the New Basel Capital Accord on bank capital requirements for small and medium sized enterprises (SMEs). We find that, for all the countries, banks will have significant benefits, in terms of lower capital requirements, when considering small and medium sized firms as retail customers. But they will be obliged to use the Advanced IRB approach and to manage them on a pooled basis. For SMEs as corporate, however, capital requirements will be slightly greater than under the existing Basel I Capital Accord. We believe that most eligible banks will use a blended approach (considering some SMEs as retail and some as corporate). Through a breakeven analysis, we find that for all of our countries, banking organizations will be obliged to classify as retail at least 20% of their SME portfolio in order to maintain the current capital requirement (8%). JEL classification: G21, G28     

Bank Portfolio Allocation: The Impact of Capital Requirements, Regulatory Monitoring, and Economic Conditions

This paper develops a structural, dynamic model of a banking firm to analyze how banks adjust their loan portfolios over time. In the model, banks experience capital shocks, face uncertain future loan demand, and incur costs based on their proximity to regulatory minimum capital requirements and the intensity of regulatory monitoring. Implications of the model then are estimated using panel data on large U.S. commercial banks operating continuously between December 1989 and December 1997. The estimated model is used to simulate the optimal bank response to (1) past and proposed changes in capital requirements, (2) changes in regulatory monitoring intensity, and (3) economic downturns. The simulation results are used to shed light on the decline in loan growth and the rise in bank capital ratios witnessed over a decade ago as well as the possible impact of the current proposed modification to capital requirements.     

理解银行资本监管改革

正资本监管改革是后危机时期国际金融监管改革的核心。2010年12月,巴塞尔委员会发布了新的资本和流动性的国际规则(巴塞尔协议Ⅲ)。在2011年11月召开的G20领导人戛纳峰会上,各国领导人承诺于2013年1月1日前实施新资本监管标准,并于2019年前全面达标。近期,欧盟、澳大利亚、瑞士、瑞典、新加坡、印度、日本、香港地区、美国等相继公布了新资本监管标准。目前,巴塞尔委员会正在对欧     

货币政策操作需要考虑银行资本监管吗

持续宽松的货币政策与巴塞尔协议下银行资本监管的共同作用,可能是本次美国次贷危机产生和经济持续波动的主因之一。巴塞尔协议下的银行资本监管,较大地改变了信贷资金的流向和经济运行规律,从而必然影响到货币政策发挥作用的基础条件与传导途径。本文结合经济周期对银行资本约束下的IS-LM模型进行了扩展分析,发现银行资本约束会通过影响银行信贷渠道使货币政策产生非对称性效果,从理论上论证了货币政策的操作必须考虑银行资本监管。本文还运用随机前沿分析(SFA)方法检验了2000～2009年我国货币政策与银行资本监管联合效率,表明在引入银行资本监管后货币政策实现经济目标的联合效率下降。因此,为了达到稳定物价与产出的总体目标,在货币政策反应函数中必须考虑银行资本及其监管状况。     

中国银行资本监管模式选择研究

有效银行资本监管涉及降低银行倒闭风险所得到的社会收益与抑制金融业发展所产生的社会成本之间的平衡问题,理想的银行资本监管应随着这些成本和收益的变化而调整,设计一种激励相容的银行资本监管制度成为对银行资本监管的现实需要,无论是标准化模式还是内部模型法都是对银行具体风险评价和风险管理方法的约束,整体监管模式建立在预先承诺制的基础之上,注重激励相容、发挥市场约束和银行自身管理的作用,在适用性、稳定性、可操作性等方面都比内部模型法具有优势.     

资本监管与银行风险:基于联立方程模型的实证分析

本文采用联立方程模型,利用我国36家商业银行的270份面板数据样本对我国商业银行资本监管、银行资本以及风险之间的关系进行了实证分析.结果表明:在资本监管下,商业银行会同时考虑其资本与风险的变化;监管压力总体而言会显著地降低银行的风险,但对上市银行风险的影响并不明显,而监管压力对银行资本产生影响并不显著.     

Joint Effects of Interest Rate Deregulation and Capital Requirements on Optimal Bank Portfolio Adjustments

The 1980 Depository Institution Deregulation and Monetary Control Act (DIDMCA) mandates that Regulation Q be phased out by 1986. With deregulation of interest rate ceilings, the cost of raising capital funds for commercial banks would become more volatile and more closely related with interest rates in the money and capital markets. Thus, value-maximizing bank managers would need to be concerned not only with the internal risk, but also with the external risk in bank portfolio management decisions. Based upon the cash flow version of the capital asset pricing model, this paper analyzes the joint impact of interest rate deregulation and capital requirements on the portfolio behavior of a banking firm.     

资本监管与银行贷款:影响机制及原因分析

本文使用我国175家商业银行1998-2009年间的贷款数据,分析了资本监管制度对银行贷款的影响,并结合理论与实际总结了相关原因.本文发现,资本监管制度实施之后,我国商业银行的信贷供给能力显著下降,贷款相对规模减少,信贷扩张的速度下降.进一步分析发现,资本监管之后,银行自身的资本水平对贷款发放产生了重要影响,资本充足率较高的银行信贷扩张的能力较强,而资本充足率较低的银行则放缓了信贷扩张的步伐.此外,本文还发现,受银行融资约束的影响,不同规模的银行在信贷扩张速度上存在一定的差异.     

货币政策、银行资本与风险承担

考虑存款准备金率作为我国货币政策的重要工具,本文在D-L-M模型中引入了法定存款准备金,分析了货币政策对银行风险承担的影响,发现货币政策对银行风险承担的影响取决于银行资本状况。接着利用我国14家上市银行的季度数据,采用门限面板回归模型实证分析了货币政策对银行风险承担的影响。实证结果表明紧缩的货币政策对银行风险承担     

Reserve Requirements,Liquidity Risk,and Bank Lending Behavior

Although reserve requirements (RR) have been used in emerging markets to smooth credit cycles, the transmission mechanism remains blurry. Using bank‐level data, we unveil the interaction of RR with bank lending. We identify a new channel that works through a decline in banks’ liquid assets and loan supply due to an increase in RR. “Quantitative tightening” through RR raises the short‐term funding needs of the banking system, which is met by collateralized central bank lending, thus depleting banks’ unencumbered liquid assets. Our results suggest that such a shift in bank liquidity is associated with a significant change in lending.     

Human Capital,Bankruptcy, and Capital Structure

We derive the optimal labor contract for a levered firm in an economy with perfectly competitive capital and labor markets. Employees become entrenched under this contract and so face large human costs of bankruptcy. The firm's optimal capital structure therefore depends on the trade‐off between these human costs and the tax benefits of debt. Optimal debt levels consistent with those observed in practice emerge without relying on frictions such as moral hazard or asymmetric information. Consistent with empirical evidence, persistent idiosyncratic differences in leverage across firms also result. In addition, wages should have explanatory power for firm leverage.     

贷款证券化、监管资本套利与资本监管改进

巴塞尔协议的资本充足率指标可以反映银行部门吸收风险损失的能力,但是无法监测和控制银行体系外的贷款总额和累积的信用风险。20世纪70年代的贷款证券化创新导致银行进行监管资本套利,并使得资本充足率监管趋于失效。本文基于贷款证券化下银行贷款余额与社会贷款余额的差异,分析银行监管资本套利的微观机制并提出改进资本监管的建议。     

Liquidity Provision,Bank Capital,and the Macroeconomy

New bank equity must come from somewhere. In general equilibrium, raising bank capital requirements means either that banks produce less short‐term debt (as debt holders must become shareholders), or short‐term debt is not reduced and the banking system acquires nonbank equity (as the shareholders in nonbanks become shareholders in banks). The welfare effects involve a trade‐off because bank debt is special as it is used for transactions purposes, but more bank capital can reduce the chance of bank failure (producing welfare losses).     

Capital, Portfolio, and Growth: Bank Behavior Under Risk-Based Capital Guidelines

This paper examines banks' capital, portfolio and growth decisions from 1986 to 1995, when risk-based capital guidelines were proposed and implemented. Overall, we observe complementarity between equity financing and risk. We find no systematic differences in pre- and postregulation behavior consistent with banks reacting to risk-based capital standards implementation. We do find significant differences, however, between low-capital banks and other banks. For example, increases in equity generally do not lead to increases in assets unless the bank has low capital. We also find that the impact of regulatory variables, such as the ratio of equity to total assets or the of ratio risk-weighted assets to total assets, have the predicted, significant effects for low-capital banks but not necessarily for other banks.