Credit risk measurement: Developments over the last 20 years

This paper traces developments in the credit risk measurement literature over the last 20 years. The paper is essentially divided into two parts. In the first part the evolution of the literature on the credit-risk measurement of individual loans and portfolios of loans is traced by way of reference to articles appearing in relevant issues of the Journal of Banking and Finance and other publications. In the second part, a new approach built around a mortality risk framework to measuring the risk and returns on loans and bonds is presented. This model is shown to offer some promise in analyzing the risk-return structures of portfolios of credit-risk exposed debt instruments.     

Credit risk assessment of fixed income portfolios using explicit expressions

We propose a model to assess the credit risk features of fixed income portfolios assuming they can be characterized by two parameters: their default probability and their default correlation. We rely on explicit expressions to assess their credit risk and demonstrate the benefits of our approach in a complex leveraged structure example. We show that using expected loss as a proxy for credit risk is misleading as it does not capture the dispersion effects introduced by correlation. The implications of these findings are relevant for improving current risk management practices and for regulation purposes.     

Credit distortion and financial crisis

A simple and consistent theory based on credit distortion is developed to understand the origin of financial crises in the emerging markets. We prove that without the guarantee of various government agencies on the credit risk of foreign loans, the interest rate on foreign loans would be the same as the domestic loans, which would eliminate the incentive to borrow foreign loans on a great scale. We demonstrate that the common phenomena preluding the crisis, such as heavy foreign borrowing and overinvestment in real estate, are rational choices when a particular currency is overvalued and cheap credit is available.     

构筑我国商业银行现代化信贷风险管理体系

文章从完善信贷管理组织结构入手 ,遵循系统性原则、权责一致原则和效率原则 ,建议对我国商业银行内部信贷组织构架应作具体的调整 :建立“信贷政策决策委员会”、完善“贷款审批制”、建立“信贷执行官负责制”和“成立风险检查部门”。在此基础上加强其他四项措施的落实 ,从而对我国商业银行信贷风险就能得到有效的控制     

浅议佳木斯市农村信用社资本管理

本文分析了辖区农村信用社资本结构以及资本管理现状,同时对资本管理现状产生的原因进行了分析,在此基础上,提出完善资本管理的对策.     

信用集中风险研究新进展

历史经验显示,信用集中风险是造成银行危机的一个主要原因,因此,在目前我国信贷快速膨胀、信用集中风险显著加剧的背景下,急需加强对我国商业银行信用集中风险的研究.然而,目前国内研究仍停留于定性分析阶段.鉴于此,本文从信用集中风险的监管要求,信用集中风险测量的理论分析和实证研究三方面对国外信用集中风险及经济资本测度模型的研究进行了述评,以期为提高我国商业银行信用集中风险的测量水平,构建与BasPl Ⅱ一致条件下的经济资本测度模型,从而为提高我国商业银行的信用风险管理能力提供一定的参考.     

基于信用利差的中国城投债券信用风险分析

在"四万亿"投资的推动下,中国城投债券的发行规模大幅增加。与此同时,城投公司的整体债务规模也急剧攀升,其债务总量超过了地方政府的财政收入水平,城投公司的整体信用水平不容乐观。因此,城投债券的信用风险需引起足够重视。本文从量化角度研究了影响中国城投债券信用风险的四个因素,结果显示,中国城投债券的信用利差与发债企业的资产规模以及发债企业所在地区的人均GDP水平负相关,与企业债券收益率以及担保正相关。     

Credit ratings and disclosure channels

We study the relation between analysts’ ratings of firms’ credit worthiness and ratings of the quality of firms’ (1) annual report disclosures, (2) quarterly and other disclosures, and (3) manager-analyst communications. We find that credit ratings are better for firms with higher rated annual report disclosures. We also find that marked increases in analyst ratings of annual report quality are accompanied by improvements in credit ratings. We find no relation between credit ratings and analysts’ ratings of either quarterly report disclosures or management-analyst communications. Overall, the results suggest that a commitment to better annual report disclosure is related to a lower cost of credit capital.     

Credit derivatives, capital requirements and opaque OTC markets

In this paper we study the optimal design of credit derivative contracts when banks have private information about their ability in the loan market and are subject to capital requirements. First, we prove that when banks are subject to a maximum loss capital requirement the optimal signaling contract is a binary credit default basket. Second, we show that if credit derivative markets are opaque then banks cannot commit to terminal-date risk exposure, and therefore the optimal signaling contract is more costly. The above results allow us to discuss the potential implications of different capital adequacy rules for the credit derivative markets.     

美国信用评级市场与监管变迁及其借鉴

美国信用评级业发展已经有上百年的历史。市场高度垄断、严重的"顺周期"现象、利益冲突、金融市场及监管当局对评级的严重依赖是当今美国信用评级市场存在的四大问题。目前美国信用评级业形成了以行业自律为基础、NRSRO注册与美国证券交易委员会(SEC)直接监管相结合的信用评级监管体系。美国信用评级市场发展及监管变迁对我国的启示是:应逐步打破国际评级市场完全由美国评级机构垄断的现有格局,必须逐步构建有中国自身特色的本土评级体系,并将本土评级体系的培育与国内债券市场建设、"走出去"战略及人民币国际化战略结合起来,降低国内监管部门及市场主体对外部评级机构的依赖。     

信用与资本——开发性金融研究

资本是关系到当下和长远发展的重要命题,而信用是实现从财富到资本转化的关键要素。本文从四个维度考察信用与资本的关系。一是关于信用的产生和演进,指出了信用产生的两个必要条件,并从社会财富三个阶段来审视信用和资本相互作用的演进过程。二是信用的性质和功能。讨论了信用的基本性质,以及规范商品和资本交易、促进资本形成以及信用的金融功能等基础性功能,并进一步讨论了信用的证券化功能以及金融市场建设功能。三是当前信用体系面对的新挑战和新问题。首先提出了美元外汇储备在一定意义上是美元信用对中国储蓄的证券化,是全球信用美元化的组成,在资本匮乏阶段是必要选择,而当下需要对财富和资本寻找新的载体,需要考虑和实现减少对美元的依赖。其次,从深化对国家信用的运用角度对解决问题的路径进行了思考,初步提出了通过发行以国家信用为基础的股权证券化工具,解决长期资本不足问题,应对当前挑战的设想。四是在回顾和总结部分,本文指出,信用的形态会随着资本发展而不断演进,从个人到企业、国家再到国际,从债务信用升级为命运信用即股权信用,乃至尚未出现的国际股权信用,是未来信用发展的方向。     

An Empirical Comparison of Credit Spreads between the Bond Market and the Credit Default Swap Market

This paper compares the pricing of credit risk in the bond market and the fast-growing credit default swap (CDS) market. The cointegration test confirms that the theoretical parity relationship between the two credit spreads holds as a long-run equilibrium condition. Nevertheless, substantial deviation from the parity can arise in the short run. The panel data study and the VECM analysis both suggest that the deviation is largely due to the higher responsiveness of CDS premia to changes in credit conditions. Moreover, it exhibits a certain degree of persistence in that only 10% of price discrepancies can be removed within a business day.     

消费信贷与家庭人力资本投资

已有丰富的文献考察了消费信贷对家庭消费和投资行为的影响,但少有研究关注其对家庭人力资本投资的影响。家庭人力资本投资对于人力资本积累、经济高质量发展至关重要。基于此,本文考察了信用卡使用对家庭人力资本投资的影响及其影响机制,主要发现如下：信用卡使用显著增加了家庭人力资本投资,且这一效应具有长期动态影响并对城市、高收入、高教育程度家庭影响更为显著,这意味着信用卡消费信贷可能会增加人力资本不平等。进一步研究发现,家庭会增加劳动力供给来应对人力资本支出的增加。机制分析表明,信用卡使用主要通过增加家庭消费投资、促进消费升级、缓解家庭预算约束三种途径促进家庭人力资本投资。在风险可控的前提下,引导消费信贷流向有利于实体经济发展的领域,可助力于消费升级与人力资本积累,从而为经济发展提供新动能。     

“十五”期间中国信贷市场发展展望

“十五”期间，我国金融机构贷款总量将继续增长，但增幅有所回落，贷款在企业资金来源中所占的比重与贷款占金融机构资产总额的比重将趋于下降。贷款结构趋于优化，不良贷款比率趋于下降，非国有企业贷款和外币贷款的比重快速上升，信贷市场与证券市场的关键日趋紧密，信贷资产证券化趋势增强。     

Examining the Equilibrium Relationship Between the Shanghai 50 Stock Index Futures and the Shanghai 50 ETF Options Markets

Based on the put-call-futures parity model, this article studies the equilibrium relationship between the Shanghai 50 stock index futures and the Shanghai 50 Exchange-Traded Fund (ETF) options markets by analyzing the arbitrage opportunities and profits between these two derivative markets. This article reveals that the cost spread, option volatility, days from the expiration date, moneyness of options, trading strategy, and policy factors all have a great impact on the arbitrage profits and opportunities. In addition, significant arbitrage profits and opportunities indicate violations of put-call-futures parity. Although no equilibrium relationship exists between the Shanghai 50 stock index futures and the Shanghai 50 ETF options markets, efficiency in these markets has gradually improved.     

Limited arbitrage between equity and credit markets

We document that short-horizon pricing discrepancies across firms' equity and credit markets are common and that an economically significant proportion of these are anomalous, indicating a lack of integration between the two markets. Proposing a statistical measure of market integration, we investigate whether equity–credit market integration is related to impediments to arbitrage. We find that time variation in integration across a firm's equity and credit markets is related to firm-specific impediments to arbitrage such as liquidity in equity and credit markets and idiosyncratic risk. Our evidence provides a potential resolution to the puzzle of why Merton model hedge ratios match empirically observed stock-bond elasticities (Schaefer and Strebulaev, 2008) and yet the model is limited in its ability to explain the integration between equity and credit markets (Collin-Dufresne, Goldstein, and Martin, 2001).     

Credit risk transfer and financial sector stability

In this paper, we study credit risk transfer (CRT) in an economy with endogenous financing (by both banks and non-bank institutions). Our analysis suggests that the incentive of banks to transfer credit risk is aligned with the regulatory objective of improving stability, and so the recent development of credit derivative instruments is to be welcomed. Moreover, we find the transfer of credit risk from banks to non-banks to be more beneficial than CRT within the banking sector. Intuitively, this is because it allows for the shedding of aggregate risk which must otherwise remain within the relatively more fragile banking sector. Therefore, regulators should act to maximize the benefits from CRT by encouraging the development of instruments favorable to the cross-sectoral transfer of aggregate credit risk (including basket credit derivatives such as collateralized debt obligations). Finally, we derive the optimal regulatory stance for banks relative to non-bank financial institutions. We show that a level playing field approach is sub-optimal. Regulatory stances should be set to actively encourage cross-sector CRT, first because of the higher fragility of the banking sector and second to induce banks to incur the costs of CRT which otherwise lead them to undertake an insufficient amount of CRT.     

债券融资发展中的信用评级

信用评级与债券融资相伴而生，并促进了债券融资的发展。从我国资本市场发展的趋势看，无论从客观要求还是完善信用评级自身之需要，加强我国信用评级的建设都极为重要。本从信用评级产生发展的角度，探讨信用评级在债券融资发展中的作用。     

Credit ratings and the cross-section of stock returns

Low credit risk firms realize higher returns than high credit risk firms. This is puzzling because investors seem to pay a premium for bearing credit risk. The credit risk effect manifests itself due to the poor performance of low-rated stocks (which account for 4.2% of total market capitalization) during periods of financial distress. Around rating downgrades, low-rated firms experience considerable negative returns amid strong institutional selling, whereas returns do not differ across credit risk groups in stable or improving credit conditions. The evidence for the credit risk effect points towards mispricing generated by retail investors and sustained by illiquidity and short sell constraints.