Why do contagion effects vary among bank failures?

Many of the previous studies on contagion effects in the banking industry focused on the failure of a large bank to determine whether the adverse effects spread to other banks. Yet, little is known whether other publicized bank failures cause contagion effects, and why the effects may vary among bank failures. Given the changes in the banking environment over time, contagion effects could be conditioned on the characteristics of the failing bank and of the banking environment at that time. We assess 99 publicized bank failures over the 1980–1996 period, and find that contagion effects exist in general for the surviving rivals of the failed bank. The degree of contagion effects varies over time (among bank failures), and is stronger when the failed bank is a multibank holding company, when the failed bank is publicly held, when the failed bank is relatively large, when the rivals are relatively small, and when the rivals have relatively low capital levels. The contagion effects are less pronounced in the period following the passage of FIRREA. Furthermore, the total risk-shifts of surviving rival banks in response to the announcement of a failed bank are inversely related to their capital level, and total risk-shifts of rival banks are less pronounced for failures occurring just after the passage of FIRREA. The results suggest that a bank’s exposure to possible contagion effects due to a bank failure can be partially controlled by a bank’s managerial policies and by regulatory policies.     

我国商业银行经营投资银行业务对风险影响的实证研究

本文以2009-2018年19家商业银行为研究对象,运用波动性分析、相关性分析及面板数据回归分析方法,考察了经营投资银行业务对银行风险的影响。研究结果表明,投资银行收入无明显周期性趋势,波动性明显高于利息净收入,经营投资银行业务会加剧银行业收入的不确定性,但由于收入占比较小,投资银行业务并非造成我国银行业收入波动的主要因素。多数银行的投资银行收入与利息净收入表现为正相关性,银行难以通过经营投资银行业务实现风险分散目的。投资银行业务对银行风险影响的回归结果较为显著,随着投资银行收入在银行收入结构中的权重越来越大,银行多元化收入程度随之加深,银行风险也随之下降。     

商业银行流动性危机传染机理研究

银行危机传染往往给一个国家或地区的经济带来巨大的损失.不完全的银行间拆借市场中隐含了更大的银行危机传染的可能性;银行间的长期资产越多,银行间拆借的短期利率和银行间存款的长期利率越高,银行间拆借市场就越稳定,在遭受流动性冲击时,这一市场发生银行危机传染的可能性就越小.适量的银行存款对传染效应具有阻碍作用.为防范系统性风险,中国商业银行应逐步建立完备的银行间存款市场,减少政府干预,让市场约束力来强化商业银行的风险管理意识.     

Bank panics and the endogeneity of central banking

Central banking is intimately related to liquidity provision to banks during times of crisis, the lender-of-last-resort function. This activity arose endogenously in certain banking systems. Depositors lack full information about the value of bank assets, so that during macroeconomic downturns they monitor their banks by withdrawing in a banking panic. The likelihood of panics depends on the industrial organization of the banking system. Banking systems with well-diversified big banks are less prone to inefficient bank runs because diversification alleviates the information asymmetry. In addition, big banks can self-monitor through publicly observable branch closure. Systems of many small banks form incentive-compatible bank coalitions to emulate the big banks during times of crisis. Such coalitions improve efficiency by monitoring member banks and issuing money that is a kind of deposit insurance—a precursor of central banking.     

A network model of systemic risk: stress testing the banking system1

Although there are many definitions of systemic risk, most agree that it manifests itself by an initial shock that results in the failure of one or more banks and then spreads out to the entire system by a contagion mechanism which can result in the failure of more banks in the system. Assuming that bank failures in the initial shock are randomly dependent on the failure probabilities of the individual banks and that the ensuing contagion process is deterministic, depending on interbank exposures, in this paper we propose a network model to analyse systemic risk in the banking system that, in contrast to other proposed models, seeks to obtain the probability distribution of losses for the financial system resulting from the shock/contagion process. Thus, calculating the probabilities of joint failures by simulation and assuming that the matrix of bilateral interbank exposures is known, we represent systemic risk in the financial system by means of a graph and use discrete modelling techniques to characterize the dynamics of contagion and corresponding losses within the network. The probability distribution of losses, risk profile for the Mexican banking system, is obtained through an efficient, complete enumeration procedure of all possible bank default events in the system. This, in turn, allows the use of the wide variety of well-established risk measures to describe the fragility of the financial system. Additionally, the model allows us to perform stress tests along both the bank default probabilities and the interbank exposures and is used to assess the risk of the Mexican banking system. Copyright © 2009 John Wiley & Sons, Ltd.     

Bank/sovereign risk spillovers in the European debt crisis

This paper investigates contagion between bank and sovereign default risk in Europe over the period 2007–2012. We define contagion as excess correlation, i.e. correlation between banks and sovereigns over and above what is explained by common factors, using CDS spreads at the bank and at the sovereign level. Moreover, we investigate the determinants of contagion by analyzing bank-specific as well as country-specific variables and their interaction. Using the EBA’s disclosure of sovereign exposures of banks, we provide empirical evidence that three contagion channels are at work: a guarantee channel, an asset holdings channel and a collateral channel. We find that banks with a weak capital buffer, a weak funding structure and less traditional banking activities are particularly vulnerable to risk spillovers. At the country level, the debt ratio is the most important driver of contagion. Furthermore, the impact of government interventions on contagion depends on the type of intervention, with outright capital injections being the most effective measure in reducing spillover intensity.     

嵌入投资银行后的银行危机传导模型

基于Sujit模型,通过在支付清算系统内构建嵌入投资银行的危机传导模型,同时考虑中央银行的两种政策对防范少数银行危机蔓延至系统危机的作用,结果发现,少数银行引发系统危机的主要原因在于危机银行影响了与其有着支付清算关系的债权银行的收益和它们的预期信心,中央银行政策对控制危机传导是有效的.     

The formation of financial networks

Modern banking systems are highly interconnected. Despite various benefits, linkages between banks carry the risk of contagion. In this article, I investigate whether banks can commit ex ante to mutually insure each other, when there is contagion risk in the financial system. I model banks' decisions to share this risk through bilateral agreements. A financial network that allows losses to be shared among various counterparties arises endogenously. I characterize the probability of systemic risk, defined as the event that contagion occurs conditional on one bank failing, in equilibrium interbank networks. I show that there exist equilibria in which contagion does not occur.     

Banking risk and regulation: Does one size fit all?

Using data for more than 200 banks from 21 OECD countries for the period 2002–2008, we examine the impact of bank regulation and supervision on banking risk using quantile regressions. In contrast to most previous research, we find that banking regulation and supervision has an effect on the risks of high-risk banks. However, most measures for bank regulation and supervision do not have a significant effect on low-risk banks. As banking risk and bank regulation and supervision are multi-faceted concepts, our measures for both concepts are constructed using factor analysis.     

银行监管和股东属性对银行风险的影响——基于新兴经济体的监管数据分析

银行监管按世界银行的标准划分为总体监管和12类分项监管;银行大股东属性包括政府类、金融企业类、外资类等.总体监管可以有效地降低银行风险;大股东为工业类、金融类企业的银行能够更好地控制风险,而家族类银行的风险程度较高;通过对分项监管进行研究可以发现,加强对所有权、资本要求、经营活动限制、外部审计要求、流动性、存款保险制度、退出及监管效率八个方面的监管可降低银行总体风险,而加强准入、内部管理、资产分类配置、信息披露这四类监管反而会增加银行总体风险.     

Financial contagion and the role of the central bank

We investigate the role of a central bank (CB) in preventing and avoiding financial contagion. The CB, by imposing reserve requirements on the banking system, trades off the cost of reducing the resources available for long-term investment with the benefit of raising liquidity to face an adverse shock that could cause contagious crises. We argue that contagion is not due to the structure of the interbank deposit market, but to the impossibility to sign contracts contingent on unforeseen contingencies. As long as incomplete contracts are present, the CB may have a useful role in curbing contagion. Moreover, the CB allows the banking system to reach first-best allocation in all the states of the world when the notion of incentive-efficiency is considered. If the analysis is restricted to constrained-efficiency, the CB still avoids contagion without, however, reaching first-best consumption allocation. The model provides a rationale for reserve requirements without the presence of fiat money or asymmetric information.     

Do foreign banks increase competition? Evidence from emerging Asian and Latin American banking markets

In this paper we examine the impact of foreign bank penetration on the competitive structure of domestic banking sectors in host emerging economies. We focus our analysis on Asia and Latin America during the period 1997-2008. Using bank-level panel data to identify foreign banks and to estimate measures of banking competition, we are able to provide robust empirical evidence that an increase in foreign bank penetration enhances competition in these host countries’ banking sectors. We find that this positive foreign bank penetration and banking competition link is associated with a spillover effect from foreign banks to their domestic counterparts. This spillover effect becomes stronger when more efficient and less risky foreign banks enter into less concentrated host country markets. We also find that the spillover effect is greater when foreign banks enter in the form of ‘de novo penetration’ than through mergers or acquisitions of domestic banks (‘M&A penetration’).     

Have changes in the financial structure affected bank profitability? Evidence for Austria

We examine the impact of changes in the financial structure of the Austrian banking sector over the past 15 years, such as disintermediation, internationalization and privatization, on the profitability of banks. Several proxies based on bank balance sheet data at the micro-level as well as macroeconomic variables are used to capture these changes. The case of Austria is particularly interesting because the opening up of the Austrian banking sector due to EU accession and the strong engagement of Austrian banks in Eastern Europe coincided with the global trend toward deregulation of banking activities. Our estimation results, which are based on dynamic panel regression methods, indicate that disintermediation (a lower percentage of loans over total assets) and higher market concentration in the banking sector had a positive effect on bank profitability, while changes in the ownership structure (privatization and increased foreign ownership) as well as more foreign lending by Austrian banks did not have a clear-cut or significant impact on bank profits.     

BANK FAILURE AND CONTAGION EFFECTS: EVIDENCE FROM HONG KONG

In this paper the influence of three Hong Kong bank failures on stock prices of the colony's banking industry is examined. As deposit insurance is nonexistent in Hong Kong, the world's fourth-largest financial center, an interesting environment is provided for testing contagion effects of bank failure on other healthy financial institutions. By examining contagion effects in an environment void of explicit deposit insurance, this study should provide interesting insights into the resiliency of modern-day financial markets. In turn, insights should also be provided into debates concerning the role and reform of deposit insurance and the rationale for regulation of the financial services industry in general. The results indicate that unexpected bank failure causes significant negative stock price reactions within the banking industry; yet, some banks are less affected than others.     

Corruption and Banking Stability: Evidence from Emerging Economies

This article investigates the effect of corruption on banking stability using data from banks in emerging markets. The analysis first reveals that a lower level of corruption had a positive impact on bank stability and is associated with fewer credit losses and with more moderate credit growth. It then highlights the importance of bank and country characteristics in identifying the asymmetric effects of corruption on bank stability. Our evidence suggests that stability of banks that are acting in a country that has not adopted a corporate governance code or is not a member of the European Union is affected more by the corruption. Also, in countries with higher levels of corruption banks could increase their stability if they implement rigorous corporate governance practices.     

Liquidation equilibrium with seniority and hidden CDO

The aim of our paper is to price credit derivatives written on a single name when this name is a bank. Indeed, due to the special structure of the balance sheet of a bank and to the interconnections with other institutions of the financial system, the standard pricing formulas do not apply and their use can imply severe mispricing. The pricing of credit derivatives written on a single bank name requires a joint analysis of the risks of all banks directly or indirectly interconnected with the bank of interest. Each name cannot be priced in isolation, but the banking system must be treated as a whole. It is necessary to analyze the contagion of losses among banks, especially the equilibrium of joint defaults and recovery rates at liquidation time. We show the existence and uniqueness of such an equilibrium. Then the standard pricing formulas are modified by adding a premium to capture the contagion effects.     

Information Contagion and Bank Herding

We show that the likelihood of information contagion induces profit-maximizing bank owners to herd with other banks. When bank loan returns have a common systematic factor, the cost of borrowing for a bank increases when there is adverse news on other banks since such news conveys adverse information about the common factor. The increase in a bank's cost of borrowing relative to the situation of good news about other banks is greater when bank loan returns have less commonality (in addition to the systematic risk factor). Hence, banks herd and undertake correlated investments so as to minimize the impact of such information contagion on the expected cost of borrowing. Competitive effects such as superior margins from lending in different industries mitigate herding incentives.     

Does Competition Affect Bank Risk?

Although policymakers often discuss trade-offs between bank competition and stability, past research provides differing theoretical perspectives and empirical results on the impact of competition on risk. We employ a new approach for identifying exogenous changes in the competitive pressures facing individual banks and discover that an intensification of competition materially boosts bank risk. With respect to the mechanisms, we find that competition reduces banks’ profits, pricing power, and charter values and increases banks’ provision of nontraditional, riskier banking services and lending to riskier firms.     

Bank globalization and efficiency: Host- and home-country effects

Analyzing 126 countries for 1995–2013, we investigate the link between bank globalization and efficiency from the perspective of both host and home countries. We find strong and consistent evidence that foreign bank entry is associated with lower efficiency in host countries (host-country effect), while foreign expansion in the banking sector improves the efficiency of banks at home (home-country effect). We further observe that the effect of bank globalization is dependent on the regulatory and institutional regimes of the respective host (home) countries. Specifically, stringent activity restrictions, tight supervision, fewer limitations on foreign banks, lower market entry barriers, and less government interference all help mitigate the efficiency loss from foreign bank entry. Less supervision power, multiple supervisors, more restrictions on foreign banks, and a competitive banking market are all conducive to the higher efficiency gain of incumbent domestic banks from the respective country’s outward investments in the banking sector. Moreover, we find that the adverse impact on efficiency from foreign bank presence is less pronounced for less risky, more profitable, and larger banks, while banks that are more efficient, more profitable, taking on more risk, and/or smaller gain more efficiency from their country’s foreign expansion.     

Shadow Banks and Macroeconomic Instability

We develop a macroeconomic model in which commercial banks can offload risky loans to a “shadow” banking sector, and financial intermediaries trade in securitized assets. The model can account both for the business cycle comovement between output, traditional bank, and shadow bank credit, and for the behavior of macroeconomic variables in a liquidity crisis centered on shadow banks. We find that following a liquidity shock, stabilization policy aimed solely at the market in securitized assets is relatively ineffective.