基于KMV模型的地方政府债券信用风险问题研究

借助于KMV模型的思想建立了地方政府债券信用风险模型,进一步探讨了模型的概率分布形态以提高模型的预测精度;并在确定预测标准后,针对2009年已发行地方政府债券的部分省市计算了各地安全发债规模。研究表明,基于KMV模型的地方政府债券信用风险模型具有很强的应用性和很好的推广前景;实践中,在对发债主体进行科学选择的基础上,通过该模型能实现对发债规模的控制,达到防止其发生信用风险的可能;同时,所选样本省市(除新疆外)的预测安全发债规模和实际发债额是合理的和安全的。因此,应建立一套科学规范的地方政府债券风险防控机制,以保证地方政府债券的健康发展。     

Local religious beliefs and municipal bond market outcomes

This study investigates whether religion-induced risk aversion affects municipal bond market outcomes from 1990 to 2017. The results indicate that local government bonds issued from U.S. counties with a high Catholic-to-Protestant population ratio have lower credit risk ratings and lower yield spreads, and are less likely to have credit enhancement. The results stand up to additional tests. I control for issuer's county political party affiliation and state term limits, and continue to find significant effects. The effects are not driven by the issuer's county fiscal policies. Furthermore, the effects persist when I use an alternate specification that controls for omitted factors that are time invariant. Overall, my evidence suggests that a bond issuer's religion-induced risk aversion plays a significant role in the pricing of local government bonds.     

A Markov model for the term structure of credit risk spreads

This article provides a Markov model for the term structureof credit risk spreads. The model is based on Jarrow and Turnbull(1995), with the bankruptcy process following a discrete statespace Markov chain in credit ratings. The parameters of thisprocess are easily estimated using observable data. This modelis useful for pricing and hedging corporate debt with imbeddedoptions, for pricing and hedging OTC derivatives with counterpartyrisk, for pricing and hedging (foreign) government bonds subjectto default risk (e.g., municipal bonds), for pricing and hedgingcredit derivatives, and for risk management.     

地方政府债务影响金融风险的传导机制--基于房地产市场和商业银行视角的研究

本文基于房地产市场和商业银行双重视角,利用2005-2017年省级面板数据和中介效应模型,实证检验地方政府债务对金融风险的风险传递关系和传导路径。实证结果显示,地方政府债务规模扩张的财政风险转化为房地产市场风险和商业银行风险;同时,土地财政、信贷扩张和影子银行是地方政府债务风险的传导路径。为防范金融风险与化解地方政府债务风险,应降低金融部门与地方政府债务的关联,厘清金融与财政的关系。     

社会信用、刚兑信仰与地方政府隐性债务

防范化解地方政府隐性债务风险是当前我国亟待解决的重要问题。本文基于2007年至2019年293个地级市面板数据,研究社会信用对地方政府隐性债务的影响。我们发现:(1)社会信用下滑会导致地方政府隐性债务规模提高和融资成本上升。(2)社会信用通过影响市场金融资源供给和政府债务需求进而影响隐性债务规模与融资成本,但上述机制在有无“刚兑信仰”情境下存在差异。(3)对比新《预算法》和“43号文”出台前后社会信用对隐性债务影响的异质性发现,债务管制显著提高了融资平台的市场化程度。虽然政策前期金融市场更多呈现出一种观望态度,但违约事件打破了金融市场对地方政府隐性债务的“刚兑信仰”,隐性债务发行受到的市场约束力度显著增强。本文对更好地认识地方政府隐性债务风险、理解当前债务治理措施的有效性以及未来如何通过完善社会信用体系建设化解地方政府隐性债务风险具有启示意义。     

失信风险传染会影响债券定价吗？——基于担保网络大数据的实证研究

在债券定价研究中不仅应该考虑企业自身的信用风险,还应该考虑相关网络组织的传染风险。本文基于43万笔非金融企业间的担保数据,构建了企业信用担保网络,发现失信风险作为一种广义的信用风险,在担保网络中具有传染效应,该传染效应能够影响债券的信用利差。企业的失信行为产生了三类传染效应,一是直接传染效应,无论是发债主体的担保人出现失信行为,还是被担保人出现失信行为,都会引起发债主体的信用利差上升;二是局部感染效应,如果局部担保网络中失信主体的占比提升,可能引起投资者对发债主体的“团体处罚”,导致信用利差上升;三是全局扩散效应,失信信息沿担保网络向整个市场扩散,导致债券信用利差上升。从企业所有制来看,民营企业主要受微观的直接传染效应和中观的局部感染效应影响;而国有企业主要受全局扩散效应影响;被担保人的失信风险对两类企业都有显著影响。失信风险传染效应会降低企业的再融资能力,其中局部感染效应导致企业次年的借款融资额下降,全局扩散效应导致企业次年的债券融资额下降。     

Banks' home bias in government bond holdings: Will banks in low‐rated countries invest in European safe bonds (ESBies)?

This paper offers two new explanations for banks' home bias in government bond holdings: a sovereign‐based rating cap on corporates and the existence of a ‘bank tax.’ These are complementary to the four explanations offered in the literature: risk‐shifting, gambling for resurrection, moral suasion, and a means to store liquidity for financing future investment. Collectively, they cast doubt on the European Union's demand‐led approach to investment in European safe bonds (ESBies) by banks in low‐rated countries. Bank regulations such as constraints on large exposure or risk‐based capital on credit risk concentration will be needed if the objective is to break the so‐called ‘deadly embrace.’     

基于套利理论与ICIR模型的债券市场发行定价偏离研究

基于套利定价理论与利率期限结构理论,运用Tobit多元线性回归模型,得出债券发行定价的主要影响因素为债券无风险利率、债券期限溢价、债项信用评级、债券主体信用评级和债券赎回风险溢价,在此基础上再通过改进的CIR定价模型(ICIR)对2006～2010年各债券定价偏离现象进行研究的结果表明,在1%的显著性水平上,ICIR模型测算的债券理论价格通过了二级市场的定价检验,ICIR模型对债券发行定价偏离进行检验具有较强的合理性;同时,从发行年份来看,近五年来,债券定价偏离总体呈逐年下降趋势,债券发行定价与ICIR定价与二级市场定价逐步接轨,市场化程度越来越高。     

Pricing Bonds and Bond Options with Default Risk

The pricing of bonds and bond options with default risk is analysed in the general equilibrium model of Cox, Ingersoll, and Ross (1985). This model is extended by means of an additional parameter in order to deal with financial and credit risk simultaneously. The estimation of such a parameter, which can be considered as the market equivalent of an agencies' bond rating, allows to extract from current quotes the market perceptions of firm's credit risk. The general pricing model for defaultable zero-coupon bond is first derived in a simple discrete-time setting and then in continuous-time. The availability of an integrated model allows for the pricing of default-free options written on defaultable bonds and of vulnerable options written either on default-free bonds or defaultable bonds. A comparison between our results and those given by Jarrow and Turnbull (1995) is also presented.     

Financial statement comparability and credit risk

Prior research shows that firms’ financial statement comparability improves the accuracy of market participants’ valuation judgments and thus may reduce firms’ costs of capital. Distinct from prior research focusing on the equity market, we develop measures of comparability relevant to debt market participants based on the within-industry variability of Moody’s adjustments to reported accounting numbers for the purposes of credit rating. We examine two sets of adjustments: (1) to the interest coverage ratio and (2) to non-recurring income items. We validate these comparability measures by providing evidence that greater comparability is associated with lower frequency and magnitude of split ratings by credit rating agencies. We predict and find that greater comparability is associated with (1) lower estimated bid-ask spreads for traded bonds, (2) lower credit spreads for both bonds and five-year credit default swaps, and (3) a steeper one- to five-year credit default swap term structure. Our results are consistent with financial statement comparability reducing debt market participants’ uncertainty about and pricing of firms’ credit risk.     

地方政企合谋与信贷资源配置

通过建立地方政企合谋与信贷资源配置的数理模型来研究分权下地方政府干预信贷资源配置服务于地方政府的自身效用，结果表明地方政企合谋是地方政府在直接干预力度减弱的情况下，间接干预金融资源配置的一个重要的途径；且地方政府官员的政治晋升是助长这些干预行为的关键因素。若将发现地方政企合谋与政府地方官员政治晋升与否直接相关，即能起到威慑作用，并能形成最优的防范地方政企合谋契约。     

The analytic pricing of asymmetric defaultable swaps

Swaps where both parties are exposed to credit risk still lack convincing pricing mechanisms. This article presents a reduced-form model where the event of default is related to structural characteristics of each party. The cash flows submitted to credit risk are identified before the swap is priced. Analytical pricing formulas for interest rate and currency swaps are computed using a Gaussian model for risky bonds. Currency swaps exhibit additional correlation risk. The benefits from netting depend on the balance between exposures and market conditions in valuation. We show that sources of credit risk asymmetries are also likely to impact on credit spreads.     

Measuring Credit Risk of Individual Corporate Bonds in US Energy Sector

In this paper, using the measures of the credit risk price spread (CRiPS) and the standardized credit risk price spread (S-CRiPS) proposed in Kariya’s (A CB (corporate bond) pricing model for deriving default probabilities and recovery rates. Eaton, IMS Collection Series: Festschrift for Professor Morris L., 2013) corporate bond model, we make a comprehensive empirical credit risk analysis on individual corporate bonds (CBs) in the US energy sector, where cross-sectional CB and government bond price data is used with bond attributes. Applying the principal component analysis method to the S-CRiPSs, we also categorize individual CBs into three different groups and study on their characteristics of S-CRiPS fluctuations of each group in association with bond attributes. Secondly, using the market credit rating scheme proposed by Kariya et al. (2014), we make credit-homogeneous groups of CBs and show that our rating scheme is empirically very timely and useful. Thirdly, we derive term structures of default probabilities for each homogeneous group, which reflect the investors’ views and perspectives on the future default probabilities or likelihoods implicitly implied by the CB prices for each credit-homogeneous group. Throughout this paper it is observed that our credit risk models and the associated measures for individual CBs work effectively and can timely provide the market credit information evaluated by investors.     

地方政府债券的经济影响分析

地方政府债券的发行对经济的影响涉及宏观、微观、金融、财政、区域发展等多个层面.其在缓解地方财政困难的同时也可能助长地方政府负债冲动,对中央财政的影响则取决于地方政府自身的偿付能力及发债规模的控制.在微观层面.地方政府债券的发行会促进地方性公共品的供给,同时也有利于实现公共品受益的代际公平;在宏观层面,有助于克服利用外资的本币化倾向,规避汇率风险问题.此外,地方政府债券的推出也有助于完善金融市场和金融体系,其对区域经济发展的影响取决于发债地区的选择标准.在推出地方债券的同时,必须通过审慎的管理来防范其风险.     

The use of performance information in cutback budgeting

Not having access to mainstream financial services, such as a bank account or a credit card, can lead to a variety of social and economic exclusions. In a number of countries, particularly Ireland, Spain, Canada and the UK, credit unions— member-owned financial co-operatives—play a significant role in reaching under-served and excluded communities, as well as providing ‘safe’ avenues for savings and credit. Yet many credit unions are facing financial and operational problems. This article looks at the experience of Welsh credit unions. The research has implications for policy development and government–credit union relations in Wales and further research on credit unions and financial inclusion.     

The typology of partial credit guarantee funds around the world

This paper presents data on 76 partial credit guarantee schemes across 46 developed and developing countries. Based on theory, we discuss different organizational features of credit guarantee schemes and their variation across countries. We focus on the respective role of government and private sector and different pricing and risk reduction tools and how they are correlated across countries. We find that government has an important role to play in funding and management, but less so in risk assessment and recovery. There is a surprisingly low use of risk-based pricing and limited use of risk management mechanisms.     

地方政府隐性债务与城投债定价

由于1994年《预算法》限制了中国地方政府凭借自身信用发行政府债券的能力,地方政府通过设立融资平台的方式发行了大量城投债券。虽然城投债被普遍认为是含有政府隐性担保的,但隐性担保主体认定尚未有共识。本文通过加总地方政府下属融资平台有息债务总额的方法,构建地方政府隐性债务负担率指标,并通过分析地方政府隐性债务负担率对城投债一二级市场信用利差的影响,进一步探索市场对城投债隐性担保责任主体的认定。研究发现,政府隐性债务负担率高的地方城投债信用利差偏高,并且这种影响随政策以及宏观形势而变化。自滇公路违约函事件后,投资者在城投债定价中开始普遍关注地方政府隐性债务负担率的信息;而在43号文明确了地方政府债务置换措施后,省级政府的隐性债务负担率开始成为城投债定价的重要影响因素。这说明投资者认可的地方隐性担保的责任主体是随时间变动的。     

Risk association: towards a linguistically informed framework for analysing risk in discourse

This article addresses a fundamental feature of risk discourse, namely, risk association, defined as the process whereby an agent establishes a connection between something, x, and the notion of risk. In addition, risk association can be defined as the result of such a process, i.e. an established connection between x and risk. A special case of risk association is when x is linked to harmful properties and thus is represented as a risk. Although fundamental to any analysis of socio-cognitive attention to risks, the process of risk association is often taken for granted in risk research. A layered model of risk association is presented taking linguistic practices, i.e. the use of words, as the point of departure. Accordingly, there are both central and more peripheral means of risk association. The central means include the morpheme ‘risk’. More peripheral means of risk association are close synonyms and antonyms of risk (e.g. ‘hazard’, ‘danger’, ‘safety’ and ‘security’) and other related words (e.g. ‘crisis’, ‘protection’ and ‘threat’). For an illustration, the model is applied to an empirical example: the instructions for Swedish government agencies. The example illustrates how the exact vocabulary considered for operationalization in analysis has important consequences for the conclusions that follow with respect to the extent to which government agencies are associated with risk.     

Bond pricing with a surface of zero coupon yields

We present a new method for consistent cross‐sectional pricing of all traded bonds in the fixed income market. By applying thin plate regression splines ( Wood, 2003 ) to bootstrapped zero coupon bond yields ( Hagan and West, 2006 ), the method decomposes traded yields into a risk‐free component plus premia for credit and liquidity risks, where the decomposition is consistent with the market valuations and underlying cash flows of the bonds. We apply the framework to end of quarter yield data from 2008 to 2011 on Australian dollar denominated semi‐government, supranational and agency (SSA) bonds, and find that the surface provides an excellent fit to the underlying zero coupon yield curves. Further, the decomposition of selected yield time series and cross‐sections demonstrates how credit premia increased for Australian SSA bonds through the Global Financial Crisis (GFC), but were counterbalanced by liquidity discounts as investors sought safe haven securities.     

Market‐based estimates of implicit government guarantees in European financial institutions

I exploit the price differential of credit default swap (CDS) contracts written on debts with different levels of seniority to measure the implicit government guarantees enjoyed by European financial institutions from 2005 to 2013. I determine that the aggregate guarantee increased substantially during the recent financial crises and peaked at an average of 89 bps in 2011. My analysis suggests that the extent of implicit support depends on the type of financial institutions and there exists a eurozone effect. Further investigation of feedback relationship shows that the guarantee implicitly offered by a government positively ‘Granger causes’ the sovereign's default risk.