中国商业银行系统性风险溢价实证研究

全球金融危机的爆发使得系统性风险的溢出效应受到普遍关注,同时也暴露出主流的风险度量方法VAR存在重大缺陷。论文借鉴最新的CoVaR方法以及分位数回归技术,衡量了我国商业银行的系统性风险溢价,实证研究发现：第一,国有银行的系统性风险溢价大于股份制商业银行;第二,无条件风险价值VaR和条件风险价值之间没有必然关联,以VaR为核心指标的现行监管政策不能有效防范系统性风险溢价;第三,银行的值不仅受金融体系共同风险冲击的影响,还受银行自身特质的影响。     

基于分位数回归商业银行系统性风险研究

在宏观审慎监管框架下,对系统重要性银行的识别并对其提出更高监管要求是金融危机后的监管重点。文章选取代表不同类型的8家上市商业银行为样本银行,采用CoVaR模型和分位数回归技术对2007-2011年实体经济和金融数据进行实证分析。实证表明:从流动性方面看,资产规模较大的银行反而面临更高的流动性风险,其风险溢出效应更容易导致系统性风险的聚集,发生危机时对系统性风险贡献较大;在宏观经济周期逆转时,中小型银行相对大型银行更容易出现风险溢出效应导致系统性风险聚集;因此政策建议:银行业监管当局的监管重点在传统的资产规模庞大的银行,同时也要关注银行业务增长过快的中小银行,这些银行往往也是系统性风险聚集和金融危机爆发的始作俑者。     

金融压力、所有制结构与银行风险承担——基于中国影子银行活动的实证研究*

2008年金融危机之后，监测与防范系统性金融风险、维护金融稳定成为各国监管机构的工作重点。本文构建了一个反映我国系统性金融风险的中国金融压力指数（FSIC）。基于此，本文研究不同所有制结构的商业银行将如何调整影子银行业务以应对系统性金融风险。实证结果表明，当金融压力上升时，相较于国有银行，非国有银行的风险承担水平显著上升。进一步研究发现，这一差异与两类银行对影子银行这一风险业务的调整有关。当金融压力上升时，国有银行会显著减少影子银行业务，而非国有银行的影子银行业务不会减少。本文提出了国有银行的双重职能这一观点来解释实证研究的发现。本文的研究结论对于指导我国金融市场化改革和防范系统性金融风险具有重要启示。     

Do banking system transparency and competition affect nonperforming loans in the Chinese banking sector?

The increasing importance of transparency practices and the improving status of bank competition in China are rarely explored in nonperforming loans (NPLs) literature. Thus, the purpose of this study is to examine banking system transparency and competition along with macroeconomic and bank-specific variables as determinants of NPL. We use the two-step system GMM dynamic panel model for Chinese banks based on annual data from 2000 to 2014. Our results indicate that high transparency in the Chinese banking system decreases poor-quality assets but not in the case of government-owned banks, whereas increase in competition increases NPL. Moreover, we find mixed results in the context of macroeconomics and bank-specific variables. Our study has practical implications in risk management practices and macro prudential policies.     

Estimating the Marginal Contribution to Systemic Risk by A CoVaR‐model Based on Copula Functions and Extreme Value Theory

In this paper, we quantify the contribution to systemic risk of a single financial institution by utilizing a analytical framework based on the principles of Extreme Value Theory (EVT) for modelling the marginal distributions and on the properties of copula functions for describing the dependence structure between the financial system and the single financial institution. Among the several systemic risk measures proposed nowadays by academics and estimated by public data, we choose to adopt as systemic risk metric the Conditional Value‐at‐Risk (CoVaR). We select a co‐risk measure like the CoVaR because of its macro‐dimension that allows us to integrate the dependence structure of the single financial institution and of the whole financial system in the systemic risk measurement. While the copula functions have been utilized in some pioneer studies on this area, the EVT principles have not yet been implemented in such a context of systemic risk contribution measurement.     

当前中国银行业面临的风险分析与判断

本文借鉴银行危机发生机理,对比分析了当前我国经济运行状态和银行风险因素,对当前中国银行业面临的风险程度进行了深入分析判断。本文认为,中国未来一段时间爆发系统性银行危机的可能性不大,但当前确实存在一些深度的风险因素,需要中国银行业引起重视与关注并采取措施积极应对,并针对性的提出了一些措施建议。     

绿色信贷能否缓解银行系统性风险*——基于中国22家上市银行的证据

本文选取2009—2020年中国22家上市银行年度数据，构建面板回归模型,就绿色信贷对银行系统性风险的影响及其传导机制与异质性特征进行实证分析。研究表明：绿色信贷对银行系统性风险具有抑制作用。风险承担与盈利能力在绿色信贷与银行系统性风险的关系中承担着双重中介作用。绿色信贷对银行系统性风险的影响存在异质性特征。相对于国有银行、低环境规制时期银行及经济上行期银行，绿色信贷对非国有银行、高环境规制时期银行及经济下行期银行系统性风险的抑制作用更为明显。该成果将为防控中国银行业系统性风险提供重要的理论指导与决策参考。     

Assessing downside and upside risk spillovers across conventional and socially responsible stock markets

Since the aftermath of the recent global financial crisis, socially responsible (SR) investments have become an alternative form of conventional finance, giving rise to further systemic risk between conventional and SR stock markets. In this paper, we assess this risk transmission using Value at Risk (VaR) modeling for the US, Europe and the Asia-Pacific region, over the period covering January 2004–December 2016. We find that socially responsible stock markets exhibit less risk than do conventional markets in terms of the risk hedging properties induced by the SR screening. Second, contributions to systemic risk vary across market phases and return distribution levels, with a larger contribution and spillover effect during the recent global financial crisis. For example, at the downside of the distribution (CoVaR at 5%), the conventional European index shows the highest contribution to the world market’s systemic risk, while the US stock market shows the highest contribution at the upside of the distribution (CoVaR at 95%). This finding is justified by the difference in the risk aversion of investors that varies with the market state as well as the disparities in the development of SR markets.     

Expected default based score for identifying systemically important banks

The issue of identifying systemically important banks has gained prominence since the recent global financial crisis in 2007. However, the extant methods either neglect the adverse impact on the financial system posed by a bank or ignore the various interactions among banks. To resolve this issue, the objective of this study is to put forward an expected default based score (EDBS) that overcomes the drawbacks of the existing methods from the perspective of contagion risk. This indicator measures the systemic importance of a bank by calculating the expected bank defaults triggered by its initial failure. In the empirical study, the expected default based score is applied to identify the systemically important banks in the Chinese banking system. Both the quantitative comparison with other major methods and the qualitative evaluation of the Delphi method validate the reliability of the EDBS method. The empirical results also demonstrate that interconnectedness among banks is an important and complementary driver of systemic importance in addition to asset size.     

WHAT CAUSES THE EFFICIENCY AND THE TECHNOLOGY GAP UNDER DIFFERENT OWNERSHIP STRUCTURES IN THE CHINESE BANKING INDUSTRY?

This paper estimates and compares the cost efficiency of the Chinese banking industry among different ownership types for the period 2003–2014, using the stochastic metafrontier model. We find that foreign banks have the lowest cost frontier, while state‐owned commercial banks undertake the least sophisticated technology. Moreover, the results of the upward trend in the technology gap ratio (TGR) and in metafrontier cost efficiency support that a more open financial market is able to enhance banking efficiency. As for the role of environmental conditions, off‐balance sheet items, non‐performing loans, and financial market structure significantly impact the TGRs of different bank types. (JEL C51, G21, D24)     

Testing the Gaussian and Student's t copulas in a risk management framework

This paper introduces a semiparametric framework for selecting either a Gaussian or a Student's t copula in a d-dimensional setting. We compare the two models using four different approaches: (i) four goodness-of-fit graphical plots, (ii) a bootstrapped correlation matrix generated in each scenario with the empirical correlation matrix used as a benchmark, (iii) Value-at-Risk (VaR) and Expected Shortfall (ES) as risk measures, and (iv) co-Value-at-Risk (CoVaR) and Marginal Expected Shortfall (MES) as co-risk measures. We illustrate this four-step procedure using a portfolio of daily returns of six international stock indices. The VaR results confirm that the t-based copula model is an attractive alternative to the Gaussian. The ES analysis is less conclusive, and indicates that risk managers should jointly use the risk measure as well as the copula model. The results highlight the importance of promoting stress testing rather than ES in the risk management industry, particularly in the aftermath of a financial crisis.     

Risk management and dynamic network performance: an illustration using a dual banking system

This study applies dynamic network data envelopment analysis to compare a dual banking system, namely conventional and Islamic banks, with emphasis on risk measures. Non-oriented, variable return-to-scale dynamic network slacks-based measure is used to model the banking performance for the period 2008–2012. Under the consideration of risk measures, the findings highlight that Islamic banks excel in managerial efficiency while conventional banks surpass in profitability efficiency. Furthermore, the regression results find that the number of directors on the risk management committee has a positive impact on banking performance. Meanwhile, the high number of independent directors improves the profitability efficiency but worsens the managerial efficiency.     

Real estate prices and systemic banking crises

The collapse of real estate prices has historically jeopardized banking stability and triggered systemic banking crises. This paper studies risk contagion in a banking system in real estate price shock by adopting complex network theory. Modelling the real estate-related asset as a common exposure of banks to the real estate market, we propose a model that incorporates two main risk contagion channels, i.e., the financial network and asset fire sales, and reveal how the real estate price shock is transmitted and propagated across banks. We demonstrate that banking stability is highly sensitive to the real estate price shock. Moreover, due to the particularly low liquidity of the real estate market, the asset fire-sales of real estate assets overwhelms the financial network, playing the dominant role in risk contagion. Our model can be adopted by regulators to conduct stress testing and to forge effective risk management strategies.     

Systemic Characteristics of Financial Instability

I describe how in the new paradigm of a Competitive, Efficient, and Frictionless Economy (CEFE), introduced in Falahati (2019), macroeconomic imbalances with fluctuating levels of liquidity emerge endogenously. This provides a solid foundation for studying Minsky’s views on financial instability in an economy with a banking and risk-underwriting system. I identify an inverse relationship between liquidity premia and risk premia, which leads to endogenous risk-premium rating cycles, including credit-risk-premium rating cycles, and macroeconomic swings. Ceteris paribus, lower liquidity increases the prices of contracts covering risks (e.g., credit default swaps), whist it decreases prices of all other assets. The opposite occurs with higher liquidity. I analyze operations of banks, risk-underwriters, and the State/Central Bank, and present a new theory of banking which improves current understandings. This theory explains how a banking system uses the floating capital of the economy more efficiently, while it also generates greater systemic risks, compared to an economy without banks. I show how the banking system can induce macroeconomic booms and busts and generate endogenous asset price bubbles and bursts. I highlight other systemic problems of the economy and derive their implications for improving the financial management of the economy and its institutions.     

Where does the risk lie? Systemic risk and tail risk networks in the Chinese financial market

This paper studies tail risk connectedness and systemic risk in the Chinese financial market in the post-crisis period of 2009–2017. We adopt the conditional value at risk (CoVaR) and complex theory to construct the tail risk connectedness network and identify the systemically important financial institutions during the Chinese financial turbulence. We precisely characterize the dynamic evolution of the tail risk connectedness at the institutional, sector and market levels. We find that, during normal times, the banking sector contributes the most tail risk to the market and that the real estate sector contributes the least. However, during the crisis period, the real estate sector played its role and became the most significant tail risk emitter. In addition, we identify the significant important financial institutions in the Chinese financial market, highlighting the fact that the four state-owned commercial banks and two largest insurance companies dominate. Our results are helpful to both regulators for developing macroprudential supervision policies and investors interested in the Chinese financial market for making risk management strategies.     

The sources of contagion risk in a banking sector with foreign ownership

Foreign-dominated banking sectors, such as those prevalent in Central and Eastern Europe, are susceptible to two major sources of systemic risk: (i) linkages between local banks and (ii) linkages between a foreign parent bank and its local subsidiary. During and after the global financial crisis, the second source of risk has been stressed by local regulators. Using a nonparametric method based on extreme value theory, we analyze interdependencies in downward risk in the banking sectors of the Czech Republic, Poland, Slovakia, and Turkey during 1994–2013. We find that the risk of contagion from a foreign parent bank to its local subsidiary is substantially smaller than the risk between two local banks.     

我国传统银行开展中小微金融活动：社会责任还是商业驱动*

传统银行往往被认为不适合开展中小微金融活动，但近年来，越来越多的传统商业银行进入到了这一领域。本文基于2007—2014年手工收集的银行业金融机构的面板数据，从银行对中小微企业的资金供给和服务提供两个方面，采用实证方法探究了我国银行参与中小微金融的动机。本文发现，除银监会政策外，社会责任与商业利益均与银行开展中小微金融业务的深度有不同程度的相关性；进一步研究表明，银行自身的股权性质和所在省份的经济文化特征同样与银行的参与程度显著相关。本文的研究弥补了现有研究中量化分析的不足，并对我国银行业监管部门制定政策以引导金融资源合理配置具有建设性意义。     

银行业放松管制的理论分析与宏观效果——兼论中国加入WTO对大陆和香港的影响

本文建立了一个包含银行、消费者和生产者的三部门一般均衡模型 ,获得了短期均衡和长期均衡条件 ,分析了存贷差扩大和国有银行改革的关系。本文有两个重要理论发现 :一个是发现了用于短期分析的D 曲线和G 曲线。另一个是发现了长期稳定均衡状态对国有银行体制改革和长期经济增长的含意。理论分析表明 ,银行业实行资产负债比例管理与利率的严格控制存在矛盾 ;中国加入WTO后 ,银行业放松管制 ,引入竞争 ,不仅能推动中国大陆的GDP、投资、消费和储蓄的增长 ,而且可以缓解通货紧缩压力 ;但是国有银行的垄断利润将下降。中国加入WTO将给香港的银行部门带来新的发展机会。     

Has economic freedom fostered bank performance? Panel evidence from China

The impact of economic freedom on the well-being of the economy has been widely documented. Noticeably absent from the literature is empirical evidence on the impact of economic freedom on the banking sector. This article employs data on the Chinese banking sector and provides for the first time empirical evidence on the impact of economic freedom. We find evidence supporting far greater freedom for entrepreneurs to start businesses. The empirical findings seem to suggest that greater freedom of trade positively influences the performance of banks operating in the Chinese banking sector. However, the impact of the different dimensions of economic freedom is not uniform across Chinese banks with different ownership structures.     

Estimating bilateral exposures in the German interbank market: Is there a danger of contagion?

Credit risk associated with interbank lending may lead to domino effects, where the failure of one bank results in the failure of other banks not directly affected by the initial shock. Recent work in economic theory shows that this risk of contagion depends on the precise pattern of interbank linkages. We use balance sheet information to estimate a matrix of bilateral credit relationships for the German banking system and test whether the breakdown of a single bank can lead to contagion. We find that in the absence of a safety net, there is considerable scope for contagion that could affect a large proportion of the banking system. The financial safety net (in this case institutional guarantees for saving banks and cooperative banks) considerably reduces—but does not eliminate—the danger of contagion. Even so, the failure of a single bank could lead to the breakdown of up to 15% of the banking system in terms of assets.