An empirical study of the Mexican banking system’s network and its implications for systemic risk

With the aim to measure and monitor systemic risk, we present some topological metrics for the interbank exposures and the payments system networks. The evolution of such networks is analyzed, we draw important conclusions from the systemic risk's perspective and propose a measure of interconnectedness. Additionally, we suggest non-topological measures to describe individual behavior of banks in both networks. The main findings of this paper are: the structures of the payments and exposures networks are different (in terms of connectivity); the topology of the exposures network changed after the collapse of Lehman Brothers, whereas the structure of the payments network does not; the proposed measure of interconnectedness can be used to determine the importance of a bank in terms of connectivity. Finally, we found that interconnectedness of a bank is not necessarily related with its assets size but it is linked to the contagion it might cause.     

Malmquist Indexes Using a Geometric Distance Function (GDF). Application to a Sample of Portuguese Bank Branches

Traditional approaches to calculate total factor productivity (TFP) change through Malmquist indexes rely on distance functions. In this paper we show that the use of distance functions as a means to calculate TFP change may introduce some bias in the analysis, and therefore we propose a procedure that calculates TFP change through observed values only. Our total TFP change is then decomposed into efficiency change, technological change, and a residual effect. This decomposition makes use of a non-oriented measure in order to avoid problems associated with the traditional use of radial oriented measures, especially when variable returns to scale technologies are to be compared. The proposed approach is applied in this paper to a sample of Portuguese bank branches.     

商业银行压力测试的国内外研究现状及其评述

在经济金融全球化不断发展的背景下,银行业稳健性对整个宏观经济的健康发展及抵御危机的能力至关重要。在实务应用上,仅仅使用日常风险度量工具(VAR)来衡量市场风险是不恰当的,压力测试作为VAR的重要补充,旨在用来测量某些小概率事件对银行经营或其所拥有的投资组合造成的影响,压力测试现已成为风险管理强有力的工具,在各国政策当局的金融稳定性评估中获得了广泛应用。     

Systemic risk governance in a dynamical model of a banking system with stochastic assets and liabilities

We consider the problem of governing systemic risk in an assets–liabilities dynamical model of a banking system. In the model considered, each bank is represented by its assets and liabilities. The net worth of a bank is the difference between its assets and liabilities and bank is solvent when its net worth is greater than or equal to zero; otherwise, the bank has failed. The banking system dynamics is defined by an initial value problem for a system of stochastic differential equations whose independent variable is time and whose dependent variables are the assets and liabilities of the banks. The banking system model presented generalizes those discussed in Fouque and Sun (in: Fouque, Langsam (eds) Handbook of systemic risk, Cambridge University Press, Cambridge, pp 444–452, 2013) and Fatone and Mariani (J Glob Optim 75(3):851–883, 2019) and describes a homogeneous population of banks. The main features of the model are a cooperation mechanism among banks and the possibility of the (direct) intervention of the monetary authority in the banking system dynamics. By “systemic risk” or “systemic event” in a bounded time interval, we mean that in that time interval at least a given fraction of banks have failed. The probability of systemic risk in a bounded time interval is evaluated via statistical simulation. Systemic risk governance aims to maintain the probability of systemic risk in a bounded time interval between two given thresholds. The monetary authority is responsible for systemic risk governance. The governance consists in the choice of assets and liabilities of a kind of “ideal bank” as functions of time and in the choice of the rules for the cooperation mechanism among banks. These rules are obtained by solving an optimal control problem for the pseudo mean field approximation of the banking system model. Governance induces banks in the system to behave like the “ideal bank”. Shocks acting on the banks’ assets or liabilities are simulated. Numerical examples of systemic risk governance in the presence and absence of shocks acting on the banking system are studied.

     

Systemic risk and bank business models

In this paper, we decompose banks' systemic risk into two dimensions: the risk of a bank (“bank tail risk”) and the link of the bank to the system in financial distress (“systemic linkage”). Based on extreme value theory, we estimate a systemic risk measure that can be decomposed into two subcomponents reflecting these dimensions. Empirically, we assess the relationships of bank business models to the two dimensions of systemic risk. The observed differences in these relationships partly explain why micro‐ and macroprudential perspectives sometimes have different implications for banking regulation.     

Cultural distance and cross-border bank linkages

This study investigates the effect of cultural distance on global bank linkages using country-pair data for the period 1990–2013. We followed Schwartz (2006) to measure cultural distance, and employed the number of bank pairs involved in cross-border syndicated lending from the source to target countries as a measure of bank linkages. We found that cultural distance has a negative association with bank linkages. This effect is stronger in countries featuring higher informational asymmetries, as represented by weaker institutions, higher uncertainty, or revolution shocks. Our results hold even when employing alternative measures of bank linkages and cultural distance, and when considering the potential endogeneity of cultural distance.     

The effectiveness of non-standard monetary policy in addressing liquidity risk during the financial crisis: The experiences of the Federal Reserve and the European Central Bank

A number of studies sought to measure the effects of non-standard policy on bank funding markets. This paper carries those estimates a step further by looking at the effects of bank funding market stress on the volume of bank lending. By separately modeling loan supply and demand, we determine how non-standard central bank measures affected bank lending by reducing stress in bank funding markets. Our results suggest that non-standard policy measures lowered bank funding volatility in the US and the Euro Area. Lower bank funding volatility in turn increased loan supply in both regions, contributing to sustained lending activity.     

On FDH efficiency analysis: Some methodological issues and applications to retail banking,courts, and urban transit

The methodology of free disposal hull (FDH) measure of productive efficiency is defined and put in perspectivevis-à-vis other nonparametric techniques, in terms of the postulates on which they respectively rest. Computational issues are also considered, in relation to the linear programming techniques used in DEA. The first application bears on a comparison between a private and a public bank, in terms of the relative efficiency of their branches. Important characteristics of the data are revealed by FDH that are not by DEA, due to a better data fit. Next, efficiency estimates of judicial activities are used to evaluate what part of the existing backlog could be reduced by efficiency increases. Finally, with monthly data of an urban transit firm over 12 years, the FDH methodology is extended to a sequential treatment of time series, that supplements efficiency estimation with a measure of technical progress.     

金融生态环境、债务治理效应与现金持有价值

文章将现金持有价值作为衡量企业资本配置效率的指标,系统考察了银行信用和商业信用两种债务融资的治理效应。实证检验发现,银行信用比例与现金持有价值呈负相关关系,在短期银行信用比例较高的企业中这一负相关关系尤为明显,特别对处于金融生态环境较差地区的企业,银行信用不仅不具有债务治理效应,反而会阻碍资本的有效配置。较之银行信用,商业信用并没有显示出显著更优的资金效率治理功能,并且其治理效应不受金融生态环境地区差异的影响。     

Local assimilation of an enterprise system: Situated learning by means of familiarity pockets

Once a new information system is introduced to the workplace, individuals confront it and struggle to make sense of it. Over time, it must be somehow learned and assimilated into everyday work practices. Enterprise systems, because they are complex and integrate work across functions and distance, pose special challenges to learning at the firm's periphery, where local users are distanced from both the centralized system and others elsewhere, and where a community of learning may be thin or lacking. The present study, using direct observations and interviews at a bank in which a new CRM system was introduced across small regional branch offices, explicates the local learning process. Findings suggest that in assimilating the system, bank representatives created familiarity pockets within which they routinely worked with it and outside of which they competently ignored it. Even within familiarity pockets, routine use of the system, while skilled, masked much that was not known by the bank reps. In short, in local assimilation of enterprise systems, knowing in practice may be constituted as much from what can be competently and routinely ignored by users, as from any deep knowledge of the system itself.     

The measurement of productive efficiency: A robust minimax approach

Some applied aspects of robustness are formulated and empirically tested so as to generalize the Farrell efficiency measure for the frontier production function. A minimax method is used to develop a Chebyshev efficiency measure along with a stochastic production frontier. The relative insensitivity of such a measure in respect of sample size variations and outliers are illustrated by an empirical application to educational production functions.     

信用担保机构与协作银行合作关系的构建

中小企业融资难是制约其发展的一个重要瓶颈,为了解决这个问题,我国建立了中小企业信用担保体系,以提升中小企业向银行申请贷款的信用等级,从而获得所需资金。然而,有关资料表明信用担保体系的功能并没有得到充分的发挥,其中主要的问题是信用担保机构与协作银行之间的合作并不理想。因此,本文从这个角度出发,分析了信用担保机构与协作银行本身及两者合作存在的问题,在此基础上,提出适合我国国情的解决对策,使得两者能够顺利合作,从而发挥担保机构的放大和杠杆作用,解决中小企业贷款难的问题,促进中小企业的发展。     

Off-balance sheet activities and bank default-risk premia: A comparison of risk measures

This paper examines the market discipline of off-balance sheet activities on the default-risk premia of subordinated bank debt. The standard approach for determining whether market prices of subordinated debt reflect the risk of default is to regress the yield spread against accounting measures of bank risk. This approach may be inadequate because yield spreads are neither linear nor monotonic functions of bank risk. Moreover, the standard approach fails to consider that banks are regulated. This paper compares this approach and one where risk is measured with a contingent claims pricing model. Observed yields on subordinated bank debt over equivalent maturity treasuries are used to compute implied asset variances. OBS banking activities appear to reduce both linear risk-premia and implied asset variances. These results suggest that bank regulators may be overly concerned with the risk exposure of off-balance sheet banking activities.     

Inefficiency and heterogeneity in Turkish banking: 1990–2000

Recent studies have stressed the importance of privatization and openness to foreign competition for bank efficiency and economic growth. We study bank efficiency in Turkey, an emerging economy with great heterogeneity in bank types and ownership structures. Earlier studies of Turkish banking had three limitations: (i) excessive reliance on cost‐function frontier analyses, wherein volume of loans is a measure of banking output; (ii) pooling all banks or imposing ad hoc heterogeneity assumptions; and (iii) lack of a comprehensive panel data set for proper analysis of productivity and heterogeneity. We use an estimation–classification procedure to find likelihood‐driven classification of bank technologies in an 11‐year panel. In addition, we augment traditional cost‐frontier analysis with a labour‐efficiency analysis. We conclude that state banks are not particularly inefficient overall, but that they do utilize labour inefficiently. This partially supports recent calls for privatization. We also conclude that special finance houses (or Islamic banks) utilize the same technology as conventional domestic banks, and do so relatively efficiently. This suggests that they do not cause harm to the financial system. Finally, we conclude that foreign banks utilize a different technology from domestic ones. This suggests that one should not overstate their value to the financial sector. Copyright © 2005 John Wiley & Sons, Ltd.     

Developing foreign bank efficiency models for DEA grounded in finance theory

We develop foreign bank technical, cost and profit efficiency models for particular application with data envelopment analysis (DEA). Key motivations for the paper are (a) the often-observed practice of choosing inputs and outputs where the selection process is poorly explained and linkages to theory are unclear, and (b) foreign bank productivity analysis, which has been neglected in DEA banking literature. The main aim is to demonstrate a process grounded in finance and banking theories for developing bank efficiency models, which can bring comparability and direction to empirical productivity studies. We expect this paper to foster empirical bank productivity studies.     

A profit function approach to measuring productivity growth: The case of U.S. manufacturing

This article proposes a method of estimating productivity growth using an estimated profit function. The approach has the advantage of incorporating endogenous changes in profit-maximizing output levels that would result from productivity changes. As with the cost function, it can be easily adapted to accomodate the presence of quasi-fixed factors. The article first develops the methodology and shows the equivalence between the proposed measure and other measures of productivity based on cost or production functions. An empirical application to the measurement of productivity changes in the U.S. manufacturing industry is presented next. The profit-function measure is compared to a nonparametric measure based on the same data and to the results of other studies of U.S. manufacturing.The refereeing process of this paper was handled through J. deMelo.     

Monetary policy and risk taking

We assess the effects of monetary policy on bank risk to verify the existence of a risk-taking channel – monetary expansions inducing banks to assume more risk. We first present VAR evidence confirming that this channel exists and is particularly significant on the bank funding side. Then, to rationalize this evidence we build a macroeconomic model where banks subject to runs endogenously choose their funding structure (deposits vs. capital) and risk level. A monetary expansion increases bank leverage and risk. In turn, higher bank risk in steady state increases asset price volatility and reduces equilibrium output.     

Economies of scale and organization efficiency in banking

Previous studies attempting to assess economies of scale in banking firms have largely relied upon cost functions. The profit-function approach enjoys several important advantages over the cost-function method, consequently that is the approach used in this study. A risk-adjusted profit function estimates economies of scale of unit and branch banks; and the effects of bank holding-company affiliation on the level of bank profits is also examined. The results indicate larger economies of scale for branch banks than for unit banks; and bank holding-company affiliates were found to be more efficient than independent banks.     

Asymmetric information,foreign entry and multi-period credit competition in banking industry

In a credit market, a low-cost foreign entrant is likely less informed than a domestic bank with information endowments. We present a steady-state model in an infinite-period framework, and analyze how the informational asymmetry affects the lending equilibrium and the foreign banks’ entry modes. Firstly, we show that the domestic bank's initial informational advantage from its relatively large market share at the beginning of competition is not enough to hinder the entry of a low-cost foreign bank. In addition, the foreign bank is more likely to be the winner in the steady state of an infinite-period game than that in a static game. Secondly, the comparative static analysis show that the likelihood of foreign bank becoming the winning party increases with borrower quality, project payoff and the growth rate of potential new borrowers. Thirdly, when the foreign bank wins game in the steady state, its market share is decreasing in project payoff and the growth rate of new borrowers, while changes non-monotonically with borrower quality. Finally, we extend our model to characterize the domestic bank's sustainable advantage in being relatively familiar with new market, and provide valuable explanations for the observed entry modes of foreign banks in China.     

我国商业银行的风险管理初探

当前,在随着世界经济的全球化下,对于国际市场一体化的影响和速度也在不断的深化。2008年全球金融危机给我国的商业银行在风险管理措施上提出了更大的挑战。因此,只有不断的提高风险管理的认知性,加强防范措施体系,才可以更好的持续发展。