美国次贷危机对中国资产证券化业务的影响及建议

美国次按危机爆发至今,已给美国以及全球金融市场带来了巨大的冲击。面对中国资产证券化发展方向的探讨,文章通过分析美国次贷危机的成因、中国证券化业务发展的现状,对比出美国次贷与中国已开展的证券化业务的本质区别,指出我们应从美国次贷危机中吸取教训,加强业务风险的防范,充分利用我国此项业务开展的后发优势,适当加快试点的步伐。     

“次级债风波”的影响为何是“重量级”的？

消费者信贷挑战金融行业的竞争并加快金融创新,次级债是金融机构在追逐利润前提下的资产证券化产物,然而资产证券化放大金融风险。有效性冲突是现代金融风险的一个新特征,它挑战现有金融监管方式,金融监管不能适应创新需要使得次级债风波重创美国金融市场。     

次贷危机中资产证券化对金融市场流动性的影响

次贷危机是一场金融市场流动性紧缩的危机.在流动性紧缩的过程中,连接多个利益主体的资产证券化负有很大责任.本文采用计量经济理论中的VAR模型对次贷危机中资产证券化对金融市场流动性的影响进行实证分析,发现在次贷危机的演进过程中,资产证券化确实对金融市场的流动性产生了持久的负面冲击效应,并导致了流动性紧缩的传导和扩散.因此,...     

关于资产证券化的资本计量

由于美国住房抵押贷款证券化产品的暴跌是次贷危机引爆器,因此,人们在研究加强资本监管时,会对证券化的资本计量给予特别关注。本文从理论结合实践的角度,对证券化产品各类市场参与者的相关资本计量问题进行了思考,梳理并归纳了资产证券化发起机构、投资机构和中介机构在各自资本计量过程中需遵循的原则及思路。     

The way we live now: Financialization and securitization

Securitization is a global multi-trillion dollar market that embodies financialization. Prior to the recent financial crisis, securitization fueled an unsustainable increase in mortgage credit. As the recent financial crisis reveals, securitization increased credit market volatility and was heightened by a reliance on debt and incentive schemes that focused on short-term profits. As extensive global reform of the securitization market takes place, there are serious reservations about the sustainability of securitization. In this paper I provide a critical perspective on securitization through a number of lenses. The story of securitization comes down to the globalization of finance and the declining importance of banks. I provide an historical assessment of securitization as well as its rise and fall over the last four decades. I also provide a critical perspective on the role of ethics and risk management in securitization in the context of the recent financial crisis. Finally, as many agencies reconsider the future of securitization, I discuss whether all assets are necessarily suitable candidates for the process.     

基于SPV制度缺陷看次贷危机后金融信用制度的重建

美国的次贷危机起源于资产证券化,而资产证券化的核心是特殊目的机构(SPV)。本文从SPV在次贷证券化中的功能构建及其制度设计中存在的缺陷出发,分析次贷危机发生的根源,进而提出后危机时代重建金融信用制度的基本原则和主要内容,以提升金融市场效率,防范金融风险。     

银行信贷与股票价格关系研究--基于后金融危机时代数据的再检验

本文以08年次贷危机以后的变量月度数据为基础,综合运用向量自回归模型以及误差修正模型来研究后金融危机时代我国银行信贷与股票价格之间的关系,实证结果表明,在金融危机后的中国,银行信贷与股票价格的关系在短期内存在一定的正向关系,但在长期内存在负向关系。通过格兰杰因果检验发现,股票市场的变化是信贷市场波动的格兰杰原因,而反之不成立。     

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.     

美国次贷危机中的金融衍生品及其风险传递研究

美国次贷危机愈演愈烈已造成了全球金融危机,究其原因在于其中的金融衍生品运用与监管不当。本文对该危机中的主要金融衍生品一次级按揭贷款、按揭贷款抵押支持债券、资产支持债券型抵押债务权益、信用违约互换等及其风险传递机制进行了深入分析,探讨了其对我国金融创新的启示。     

The Real Effects of FAS 166/167 on Banks’ Mortgage Approval and Sale Decisions

We examine the real effects of FAS 166 and FAS 167 on banks’ loan‐level mortgage approval and sale decisions. Effective in 2010, these standards tightened the accounting for securitizations and consolidation of securitization entities, respectively, causing banks to recognize an estimated $811 billion of securitized assets on balance sheet. We find that banks that recognize more securitized assets exhibit larger decreases in mortgage approval rates and larger increases in mortgage sale rates. These effects significantly exceed those of banks’ off–balance sheet securitized assets, consistent with our results being driven by the consolidation of securitization entities rather than by securitization per se. We conduct tests that help rule out the financial crisis as an alternative explanation for our results. Further analyses suggest that mechanisms underlying the results include consolidating banks’ reduced regulatory capital adequacy, increased market discipline, and consequent desire not to recognize high‐risk mortgages on balance sheet.     

美国次按问题的实质

次按危机愈演愈烈,给全球金融市场和大型金融机构造成重大损失。该文深入分析了次按危机的深层影响,认为次按危机引致的信贷紧缩已经演变为消费紧缩,打破了美国长期以来借钱消费的兴旺周期,美国过往的消费模式从而经济增长模式已难以为继;次贷危机不仅直接打击美国经济,同时也拖累世界经济增长。文章认为如何解决美国经济的结构性问题以及这个过程会对世界经济产生何种影响,才是解决美国次按问题的实质。     

The impact of securitization on the expansion of subprime credit

This paper investigates the relationship between securitization activity and the extension of subprime credit. The analysis is motivated by two sets of compelling empirical facts. First, the origination of subprime mortgages exploded between the years 2003 and 2005. Second, the securitization of subprime loans increased substantially over the same time period, driven primarily by the five largest independent broker/dealer investment banks. We argue that the relative shift in the securitization activity of investment banks was driven by forces exogenous to factors impacting lending decisions in the primary mortgage market and resulted in lower ZIP code denial rates, higher subprime origination rates, and higher subsequent default rates. Consistent with recent findings in the literature, we provide evidence that the increased securitization activity of investment banks reduced lenders' incentives to carefully screen borrowers.     

Credit risk transfer in U.S. commercial banks: What changed during the 2007–2009 crisis?

Following the debate on the role of credit risk transfer (CRT) in exacerbating the 2007–2009 crisis, this paper investigates the usage and effects of loan sales, securitization, and credit derivatives in U.S. commercial banks over the last decade, with special emphasis on the financial crisis. We find that in times of severe funding constraints, the need to raise financial resources becomes the principal incentive behind CRT. We document some beneficial effects of CRT on the economy, since the funds released through CRT are subsequently invested by banks to sustain credit supply, also in recession. However, we report higher overall riskiness in banks that engage intensively in loans sales and securitization, which translates into higher default rates during the crisis. Interestingly, the benefits and drawbacks of CRT are much stronger for loan sales and securitization than for credit derivatives.     

试论房价波动对商业银行资产的影响

基于次贷危机的启示,本文构建了在不同的金融发展程度下房地产价格波动对商业银行资产影响的理论模型,并在此基础上对中国的现状进行分析,指出当前对中国的影响主要集中于商业银行基于负债业务发放的贷款领域。进一步地,利用向量自回归模型(VAR)及冲击响应函数对中国房地产价格波动对商业银行贷款的影响进行了实证检验。研究表明:金融创新改变了房地产价格波动对商业银行资产的影响模式;中国房价波动对商业银行资产的影响主要集中在源于银行负债发放的贷款领域,但总体影响有限;中国应加快发展银行资产证券化业务,谨慎发展信用衍生产品。     

The impact of a new term auction facility on Libor–OIS spreads and volatility transmission between money and mortgage markets during the subprime crisis

During the subprime crisis, the U.S. Federal Reserve was concerned about widening spreads between overnight interbank lending rates such as the overnight index swap (OIS) and term London Interbank Offer Rate (Libor). Among the tools it used to counter the impact of the crisis, the innovative term auction facility (TAF) attracted much attention. We investigate the impact of the TAF on the Libor–OIS spread. We find that the TAF has clear initial and sustained expectation effects on the three-month Libor–OIS spread, but no real initial or short-term funding effects, which casts doubt on the usefulness of the TAF in reducing risk spreads. Since the subprime crisis also spilled across the interbank, commercial paper, and jumbo mortgage markets, we further examine the lead–lag relation between Libor–OIS, commercial paper, and jumbo spreads and the volatility transmission effects between them. For the period before the crisis, we find that the three markets behave largely independently. For the subprime crisis period, however, we find multidirectional lead–lag relations and one-way volatility transmission between these markets.     

A comparative study of the probability of default for global financial firms

This article presents a modification of Merton’s (1976) ruin option pricing model to estimate the implied probability of default from stock and option market prices. To test the model, we analyze all global financial firms with traded options in the US and focus on the subprime mortgage crisis period. We compare the performance of the implied probability of default from our model to the expected default frequencies based on the Moody’s KMV model and agency credit ratings by constructing cumulative accuracy profiles (CAP) and the receiver operating characteristic (ROC). We find that the probability of default estimates from our model are equal or superior to other credit risk measures studied based on CAP and ROC. In particular, during the subprime crisis our model surpassed credit ratings and matched or exceeded KMV in anticipating the magnitude of the crisis. We have also found some initial evidence that adding off-balance-sheet derivatives exposure improves the performance of the KMV model.     

Subprime Mortgage Defaults and Credit Default Swaps

We offer the first empirical evidence on the adverse effect of credit default swap (CDS) coverage on subprime mortgage defaults. Using a large database of privately securitized mortgages, we find that higher defaults concentrate in mortgage pools with concurrent CDS coverage, and within these pools the loans originated after or shortly before the start of CDS coverage have an even higher delinquency rate. The results are robust across zip code and origination quarter cohorts. Overall, we show that CDS coverage helped drive higher mortgage defaults during the financial crisis.     

政府担保、资产价格泡沫与金融安全——基于道德风险模型的分析视角

本文运用金融危机理论的道德风险模型,分析了美国次贷危机的产生及其传导.由于政府隐性担保的存在,金融机构过度投资,导致资产价格泡沫的产生和破灭,最终爆发金融危机.面对次贷危机所导致的金融风险的国际传导,中国应当合理地配置和运用外汇储备,维护国家的金融安全.     

Estimation of Housing Price Jump Risks and Their Impact on the Valuation of Mortgage Insurance Contracts

Housing price jump risk and the subprime crisis have drawn more attention to the precise estimation of mortgage insurance premiums. This study derives the pricing formula for mortgage insurance premiums by assuming that the housing price process follows the jump diffusion process, capturing important characteristics of abnormal shock events. This assumption is consistent with the empirical observation of the U.S. monthly national average new home returns from 1986 to 2008. Furthermore, we investigate the impact of price jump risk on mortgage insurance premiums from shock frequency of the abnormal events, abnormal mean and volatility of jump size, and normal volatility. Empirical results indicate that the abnormal volatility of jump size has the most significant impact on mortgage insurance premiums.     

Securitization and financial solvency: empirical evidence from Portugal

This paper analyses the effect of securitization issues on the solvency of Portuguese financial institutions. For this purpose, we use an unbalanced panel model estimated using GMM methods and find that securitization has a slightly positive impact on the soundness of the issuing entity. We study 35 financial entities and 60 traditional securitizations issued by 9 originators between 2001 and 2013. The analysis reveals that the financial entities’ soundness improved slightly, showing that securitization enhanced the quality of the originators’ portfolios and increased the regulatory capital requirements. We also found that efficiency and profitability improve the risk-adjusted ROAA and that efficiency increases regulatory capital requirements. The robustness analysis confirms the positive effect of securitization on solvency, where both credit quality and liquidity are shown to be significant variables.