Systemic Bank Risk in Brazil: A Comprehensive Simulation of Correlated Market, Credit, Sovereign and Inter-Bank Risks

In this study we present a comprehensive forward‐looking portfolio simulation methodology for assessing the correlated impacts of market risk, private sector and Sovereign credit risk, and inter‐bank default risk. In order to produce better integrated risk assessment for banks and systemic risk assessments for financial systems, we argue that reasonably detailed modeling of bank asset and liability structures, loan portfolio credit quality, and loan concentrations by sector, region and type, as well as a number of financial and economic environment risk drivers, is required. Sovereign and inter‐bank default risks are increasingly important in the current economic environment and their inclusion is an important model extension. This extended model is demonstrated through an application to both individual Brazilian banks (i.e., 28 of the largest banks) and groups of banks (i.e., the Brazilian banking system) as of December 2004. When omitting Sovereign risk, our analysis indicates that none of the banks face significant default risk over a 1‐year horizon. This low default risk stems primarily from the large amount of government securities held by Brazilian banks, but also reflects the banks' adequate capitalizations and extraordinarily high interest rate spreads. We note that none of the banks which we modeled failed during the very stressful 2007‐2008 period, consistent with our results. Our results also show that a commonly used approach of aggregating all banks into one single bank, for purposes of undertaking a systemic banking system risk assessment, results in a misestimate of both the probability and the cost of systemic banking system failures. Once Sovereign risk is considered and losses in the market value of government securities reach 10% (or higher), we find that several banks could fail during the same time period. These results demonstrate the well known risk of concentrated lending to a borrower, or type of borrower, which has a non‐zero probability of default (e.g., the Government of Brazil). Our analysis also indicates that, in the event of a Sovereign default, the Government of Brazil would face constrained debt management alternatives. To the best of our knowledge no one else has put forward a systematic methodology for assessing bank asset, liability, loan portfolio structure and correlated market and credit (private sector, Sovereign, and inter‐bank) default risk for banks and banking systems. We conclude that such forward‐looking risk assessment methodologies for assessing multiple correlated risks, combined with the targeted collection of specific types of data on bank portfolios, have the potential to better quantify overall bank and banking system risk levels, which can assist bank management, bank regulators, Sovereigns, rating agencies, and investors to make better informed and proactive risk management and investment decisions.     

Competition,financial innovation and commercial bank loan portfolios

I examine how US commercial bank loan portfolios change in response to the rise of securitization markets and banking market deregulations over 1976–2003. Banks increasingly tilt their portfolios toward real-estate-backed loans. However, there are significant differences across banks. Larger banks and younger banks disproportionately shift their lending toward real-estate-backed loans, particularly commercial real-estate-backed loans, whereas smaller banks and older banks maintain greater shares of their loan portfolios in commercial and personal loans. When larger banks make more real-estate-backed loans, they charge lower interest rates, consistent with these banks lowering the costs of lending and expanding credit for borrowers. In contrast, smaller banks charge higher interest rates, consistent with these banks restricting lending to a select group of borrowers.     

The sensitivity of bank stock returns to real estate

According to the Federal Reserve Board, banking firms have recently been shifting significantly larger portions of their loan portfolios into real estate. This increase in real estate lending has caused concern about the continuing economic health of banks on the part of state and federal regulators, since changes in real estate returns, evidenced by changes in property value, can potentially have a significant impact on bank default risk and profit-ability. However, concerned parties do not seem to have explicitly considered the relationship between mortgage default risk and the specific characteristics of real estate investments.This study examines the sensitivities of stock returns for different bank groups, based on the percentage of total loans in real estate and the percentage of loans in five different mortgage categories (construction and development loans, farmland loans, one- to four-family residential loans, multifamily residential loans, and nonresidential and nonfarm loans), to changes in real estate market returns. This is done by developing and using a three-index model.The results of this study indicate that bank stocks, overall, are very sensitive to changes in real estae returns. Banks, with a larger portion of their total loans invested in all types of real estate loans, except farmland loans, are most sensitive to changes in real estate returns.     

Banks’ lending behavior and monetary policy: evidence from Sweden

The main purpose of this paper is to investigate the aggregate data about bank loans which may hide significant information about the monetary transmission mechanism. This study, by disaggregating bank loans data and using the relevant interest rates in Sweden, investigates the behaviour of banks after a monetary policy tightening. By using an unrestricted VAR model and impulse response analysis, our results show that a shock on the policy rate affects the main components of the banks’ loan portfolios differently. Initially, banks do not reduce lending to firms and households and they present a sluggish reaction concerning the relevant interest rates. On the contrary, they reduce lending to mortgage credit institutions significantly since real estate lending can be considered as a risky long-term investment. Moreover mortgage credit institutions reduce lending for housing purposes to non-bank public. This reduction is mainly driven by flexible rate loans and loans secured on tenant owned apartments. Consequently, theses actions have a significant effect on real economic activity, by amplifying the initial shock from the tightening monetary policy. The latter result provides evidence of the bank lending channel in Sweden working via mortgage lending and could be very important for policy makers.     

What influences banks’ choice of credit risk management practices? Theory and evidence

Banks use different risk management practices with varying levels of sophistication. This paper examines the factors that determine the choice of risk-management practices. In a theoretical model, we identify two main determinants for the choice of risk management tools: bank competition and sector concentration in the loan market. We empirically test the predictions of our model using hand-collected data on the credit risk management of 249 German savings banks. The results are in line with our theory: Competition pushes banks to implement advanced risk management practices. Sector concentration in the loan market promotes credit portfolio modeling, but it inhibits credit risk transfer.     

Risk Overhang and Loan Portfolio Decisions: Small Business Loan Supply before and during the Financial Crisis

We estimate a structural model of bank portfolio lending and find that the typical U.S. community bank reduced its business lending during the global financial crisis. The decline in business credit was driven by increased risk overhang effects (consistent with a reduction in the liquidity of assets held on bank balance sheets) and by reduced loan supply elasticities suggestive of credit rationing (consistent with an increase in lender risk aversion). Nevertheless, we identify a group of strategically focused relationship banks that made and maintained higher levels of business loans during the crisis.     

Lending Booms and Lending Standards

We examine how the informational structure of loan markets interacts with banks' strategic behavior in determining lending standards, lending volume, and the aggregate allocation of credit. We show that, as banks obtain private information about borrowers and information asymmetries across banks decrease, banks may loosen their lending standards, leading to an equilibrium with deteriorated bank portfolios, lower profits, and expanded aggregate credit. These lower standards are associated with greater aggregate surplus and greater risk of financial instability. We therefore provide an explanation for the sequence of financial liberalization, lending booms, and banking crises observed in many emerging markets.     

What determines the composition of banks’ loan portfolios? Evidence from transition countries

This paper explores how bank characteristics and the institutional environment influence the composition of banks’ loan portfolios. We use a new and unique data set based on the EBRD Banking Environment and Performance Survey (BEPS), which was conducted for 220 banks in 20 transition countries. We show that bank ownership, bank size, and legal creditor protection are important determinants of the composition of banks’ loan portfolios. In particular, we find that foreign banks play an active role in mortgage lending. Moreover, banks that perceive pledge and mortgage laws to be of high quality choose to focus more on mortgage lending.     

Are real estate specializing depositories viable? Evidence from commercial banks

This study investigates whether depository institutions that concentrate on real estate lending are economically viable by examining the behavior of a sample of commercial banks that chose over the last decade to specialize in real estate lending. The results show that over the 1978–1988 period, the average real estate specializing bank earnings performance was on par with regular commercial banks, and those that were in the business for a longer period of time had higher returns with less risk than substantially more diversified commercial banks. Real estate banks has relatively lower loan losses and relatively higher proportions of lower risk, one- to four-family mortgage loans than regular commercial banks. Finally, it appears that real estate banks exhibited substantial flexibility in their ability to adjust their real estate loan holdings.     

Liquidity regulation and bank lending

Bank liquidity shortages during the global financial crisis of 2007–2009 led to the introduction of liquidity regulations, the impact of which has attracted the attention of academics and policymakers. In this paper, we investigate the impact of liquidity regulation on bank lending. As a setting, we use the Netherlands, where a Liquidity Balance Rule (LBR) was introduced in 2003. The LBR was imposed on Dutch banks only and did not apply to other banks operating elsewhere within the Eurozone. Using this differential regulatory treatment to overcome identification concerns and a difference-in-differences approach, we find that the LBR increased the volume of lending by Dutch banks relative to other banks located in the Eurozone. Increased equity, an inflow of retail deposits and subsequent increase in balance sheet size allowed Dutch banks to increase lending despite having to meet the LBR requirements. The LBR also affected the loan composition of Dutch banks (with corporate and retail lending increasing more than mortgage lending) and the maturity profile of loan portfolios. Our results have relevance for policymakers tasked with monitoring the impact of liquidity regulations on banks and the real economy.     

The bank capital channel and bank profits

This paper develops a microeconomic model of banking to highlight an endogenous loan creation process that emerges from bank profits via the capital accumulation of retained earnings and uses a simple bank capital‐loan multiplier to illustrate constraints on lending. The study also analyzes how sufficient net interest margins are important for banks to maintain lending portfolios and avoid financial fragility. The model offers support to bank capital channel (BKC) economists by illustrating how changes in interest rates may influence bank lending through the bank's internal capital accumulation growth rate and on a bank's portfolio choices.     

Market Discipline of Banks: The Asset Test

As the banking business grows more complex, government supervisors of banks seem increasingly willing to share the role of policing bank risk with private investors, especially bondholders. Using spreads on nearly 500 bank bond issues between 1993 and 1998, this paper investigates the relationship between the spreads on those bonds and the full portfolio of assets held by the issuing bank. Our results show that bond spreads reflect the overall mix of banks' assets at the time of issuance, even after controlling for the standard measures of risk and performance used in earlier studies. Banks contemplating a shift into riskier activities like trading, for example, can expect to pay higher spreads as a result. Credit card and commercial and industrial lending also carry a penalty in terms of higher spreads. Overall, these results suggest that investors do price the ex ante credit and other risks implicit in banks' asset portfolios. Their vigilance should help to deter excessive or inefficient risk taking by banks.     

抵押资产价值评估:机构、技术与法律环境

抵押贷款是近年来商业银行信贷的主要方式。然而,由于抵押品自身存在的风险以及银行在抵押品评估中的疏漏,抵押贷款难以收回所导致的银行危机屡见不鲜。因此,抵押品价值评估机构体系的建立和设置,以及各种评估技术的创新和评估系统法律环境的建立,成为缓释银行信用危机、降低银行信贷风险的关键。     

Bank risk and monetary policy

We find evidence of a bank lending channel operating in the euro area via bank risk. Financial innovation and the wider use of new ways of transferring credit risk have tended to diminish the informational content of standard bank balance sheet indicators. We show that bank risk conditions, as perceived by financial market investors, need to be considered, together with the other indicators (i.e., size, liquidity and capitalization), traditionally used in the bank lending channel literature to assess banks’ ability and willingness to supply new loans. Using a large sample of European banks, we find that banks characterized by lower expected default frequency are able to offer a larger amount of credit and to better insulate their loan supply from monetary policy changes.     

Dissecting Foreign Bank Lending Behavior During the 2008–2009 Crisis

This paper analyzes the lending behavior of foreign‐owned banks during the recent global crisis. Using bank‐level panel data for 51 countries, the paper explores the role of affiliate and parent financial characteristics, host location, as well as the impact of parent geographic origin and reach on foreign banks’ credit growth. Overall, the analysis finds robust evidence that foreign banks curtailed the growth of credit relative to other banks, independent of the host region in which they operate. Banks from the United States reduced loan growth less than other parent banks. Neither the global nor regional reach of parent banks influenced the lending growth of foreign affiliates. Parent capitalization and not parent funding explained the behavior of foreign bank credit growth during the global crisis. However, funding did affect the lending behavior of domestic and foreign banks in host countries, with those relying more heavily on deposits suffering a smaller decline in bank lending. Although not the focus of the paper, we also find that government‐owned banks played a countercyclical role in all regions.     

The Cross‐Market Spillover of Economic Shocks through Multimarket Banks

This study investigates the mortgage lending of banks operating in multiple U.S. metropolitan areas during the housing market collapse of 2007–09. We show that multimarket banks reduced local portfolio lending in response to high overall mortgage delinquencies in their other markets, consistent with the view that local economic shocks can be transmitted to other regions through banks’ internal capital markets. This spillover was greatest when the bank lacked a branch presence and when the market was highly peripheral to the bank in terms of its total mortgage lending. These effects were not fully offset by securitization or other portfolio lenders.     

Euro area banking and monetary policy shocks in the QE era

This paper assesses the effects of monetary policy shocks on the macroeconomy and the euro area banking sector after the global financial crisis. First, financial risk-return indicators of the banking sector based on a compound option-based structural credit risk model are embedded in a large macro-financial quarterly database covering the period 2008Q4–2019Q4. Second, a SFAVAR identifies and estimates the shocks’ responses relating them to the endogenous build-up of banks’ vulnerabilities which are consistent with the internally coherent structure of the credit risk model. By introducing structure in the understanding of banks’ asset-liability management behavior following monetary policy shocks, the research strategy contributes to disentangling results that are often mixed in the empirical literature. The study finds that unconventional monetary policy, in particular the Asset Purchase Program of the European Central Bank, seems to have been more successful than conventional monetary policy in raising output and inflation. The desired boost to bank lending has been muted and loan cyclicality has varied across countries and loan types. The performance of the banking sector following monetary policy shocks can be characterized by a drop in expected return on equity and assets, a relaxation of lending conditions and increased correlation between banks’ assets return and the market return, a mechanism pointing to enhanced risk-taking. While banks’ probabilities of default fall following monetary policy shocks, the price of risk increases. Banks’ net worth rises via higher market capitalization and implied assets value together with lower volatility, despite often incurring more debt. Risk-taking in the banking sector may pose a risk to financial stability, especially if its effects on banks’ vulnerability spread and increase systemic risk. The unintended endogenous build-up of macro-financial vulnerabilities may need to become part of monetary policymaking.     

Cyclicality of SME lending and government involvement in banks

Recent regulatory efforts aim at lowering the cyclicality of bank lending because of its potentially detrimental effects on financial stability and the real economy. We investigate the cyclicality of SME lending of local banks with versus without a public mandate, controlling for location, size, loan maturity, capitalization, funding structure, liquidity, profitability, and credit demand-side factors. The public mandate is set by local governments and stipulates a sustainable provision of financial services to local customers and a deviation from strict profit maximization. We find that banks with a public mandate are 25% less cyclical than other local banks. The result is credit supply-side driven and especially strong for public mandate banks with high liquidity and stable deposit funding. Our findings have implications for the bank structure, financial stability and the finance-growth nexus in a local context.     

Syndicated Leveraged Loans During and After the Crisis and the Role of the Shadow Banking System

In an article published in this journal in 1998, Nobel laureate Merton Miller argued that one of the best weapons available to national economies in their defense against the macroeconomic effects of banking crises is the availability of non‐bank financial institutions and products—or what we now refer to as the “shadow banking system.” Although Miller may have exaggerated the independence of bank‐ and market‐based sources of financing, the author argues that events during and after the recent crisis have shown Miller's claims about the importance of non‐bank investors in the provision of credit to be fundamentally correct. Critics of securitization and the shadow banking system tend to focus on the subprime mortgage story in which the sudden re‐pricing of credit risk and the resulting disappearance of investment demand for ABCP, private‐label mortgage‐related ABS, and ABS CDOs created unexpected and significant downward price pressure on those asset types. But the leveraged loan market tells a very different story. In contrast to the near complete disappearance of private mortgage securitizations, the extraordinary recovery of the U.S. syndicated leveraged loan market demonstrates that the relation between commercial and shadow banking has proved to be a highly productive and resilient one—and very much a two‐way street. When leveraged loans and CLOs experienced problems from 2007 through 2009 due primarily to the widespread liquidity and credit market disruptions that affected essentially all structured credit products, institutional investors in leveraged loans disappeared and the leveraged loan primary market imploded. But when institutional participants recognized the value of the underlying asset—corporate loans—and regained confidence in shadow‐banking products, leveraged lending by banks recovered quickly and dramatically. This outcome is viewed as vindicating Professor Miller's statement about the benefits of shadow markets and securitization— namely, the role of non‐bank investors in diversifying the risk of credit creation while at the same time improving the price discovery process in different markets. The recent history of the U.S. leveraged loan market demonstrates that shadow banking system participants play a critical role in meeting the total demand for such loans, and that the ebbs and flows from institutional leveraged loan markets are strongly connected with the health and integrity of the underlying leveraged bank loan market.     

房地产贷款中的信息不充分及其风险

房地产市场价格波动之所以能够引起银行房地产信贷损失,甚至导致金融市场和宏观经济不稳定的后果,原因是由于房地产抵押贷款中存在的测不准风险或不确定性。本文从信息不充分的视角,提出了房地产抵押贷款中的测不准风险的定义,并分析了测不准风险的特性、形成原因和特殊后果。本文认为,减少或消除不必要的不可预见和不可描述的不确定性可能是管理房地产抵押贷款违约风险,提高贷款配置效率的最好途径,这对于分析房地产市场价格波动与金融市场、宏观经济的互动关系,防止房地产价格波动对金融业和宏观经济的冲击至关重要。