GSEs,Mortgage Rates,and the Long-Run Effects of Mortgage Securitization

Our paper compares mortgage securitization undertaken by government-sponsored enterprises (GSEs) with that undertaken by private firms, with an emphasis on how each type of mortgage securitization affects mortgage rates. We build a model illustrating that market structure, government sponsorship, and the characteristics of the mortgages securitized are all important determinants of mortgage rates. We find that GSEs generally—but not always—lower mortgage rates, particularly when the GSEs behave competitively, because the GSEs implicit government backing allows them to sell securities without the credit enhancements needed in the private sector. Using our simulation model, we demonstrate that when mortgages eligible for purchase by the GSEs have characteristics similar to other mortgages, the GSEs implicit government-backing generates differences in mortgage rates similar to those currently observed in the mortgage market (which range between zero and fifty basis points). However, if the mortgages purchased by GSEs are less costly to originate and securitize, and if the GSEs behave competitively, then the simulated spread in mortgage rates can be much larger than that observed in the data.     

Credit Scoring and Mortgage Securitization: Implications for Mortgage Rates and Credit Availability

This article develops a model of the interactions between borrowers, originators, and a securitizer in primary and secondary mortgage markets. In the secondary market, the securitizer adds liquidity and plays a strategic game with mortgage originators. The securitizer sets the price at which it will purchase mortgages and the credit-score standard that qualifies a mortgage for purchase. We investigate two potential links between securitization and mortgage rates. First, we analyze whether a portion of the liquidity premium gets passed on to borrowers in the form of a lower mortgage rate. Somewhat surprisingly, we find very plausible conditions under which securitization fails to lower the mortgage rate. Second, and consistent with recent empirical results, we derive an inverse correlation between the volume of securitization and mortgage rates. However, the causation is reversed from the standard rendering. In our model, a decline in the mortgage rate causes increased securitization rather than the other way around.     

Mortgage Delivery to the Secondary Market when Interest Rates are Falling

A borrower whose loan is committed to the securitization process has the ability and incentive to switch lenders if market rates drop during the loan origination period, which creates significant exposure for primary lenders. A simple secondary market contract innovation we call a mortgage rate drop guarantee (MRDG) could shift this risk to the securitizers who represent portfolio investors. Our simulation results indicate this shifting would have improved the risk/return distribution faced by originators without damaging the risk/return position of securitizers during our 1977–2010 sample period. Assuming conservative loan lives and origination periods, and competitive lending markets, the risk reduction features of MRDGs could also have generated significant interest savings for borrowers.     

Skewness of Returns, Capital Adequacy, and Mortgage Lending

We calibrate a simulation model of credit value-at-risk for mortgage lending to UK experience. Simulations to capture the skewness of returns that might arise in the context of a financial crisis suggest that the IRB calculations of the new Basel Accord can substantially understate prudential capital adequacy. The same model shows that raising capital requirements has only a small impact on bank funding costs. We conclude that Pillar 2 supervisory review should increase capital requirements above IRB levels for secured bank assets—those whose returns can potentially fall furthest, relative to other, normally “riskier” assets, in extreme outcomes. JEL classification: G21, G28, R31. Presented at the December 2003 conference at the University of Tor Vegata, Rome. We are grateful for comments from William Lang, Mario Onarato, Larry Wall, and from an anonymous referee. All errors and omissions are our own responsibility. “The lady doth protest too much, methinks. The Queen's response to the players in Hamlet, Act 3, scene 2.     

Integration of International Long-Term Interest Rates: A Fractional Cointegration Analysis

In this study, we re-examine the relationship among interest rates on the long-term government bonds of five industrialized countries. Using both the variance ratio test and fractional cointegration analysis, we find significant evidence that indicates the five government bond rates are fractionally cointegrated. In specific, our results show that the error correction term of the system of the five interest rates follows a mean-reverting, fractionally integrated process.     

国有商业银行引入经济资本管理研究

资本管理是商业银行经营管理中最重要的一个部分。本文从资本管理的产生、发展和意义分析入手,运用经济资本管理的理念和方法,对当前国有商业银行经营管理中值得注意的问题进行了深入分析,并指出:引入资本管理的具体策略应当是以经济资本管理的理念为指导,以风险调整后的资本利润率RAROC方法为手段,以监管资本的管理为切入点,力争用3～5年的时间,分阶段逐步建立和不断完善我国国有商业银行的全面风险管理机制,实现国有商业银行及其分支机构的经营管理行为与银行(或股东)价值最大化相统一。在此基础上,本文对我国国有商业银行实施经济资本管理提出了初步的操作思路。     

A Proportional Hazards Model of Commercial Mortgage Default with Originator Bias

A proportional hazards model with competing risks is specified and is extended to correct for the possibility of originator bias. The model is used to examine the ability of option-theoretic models of mortgage pricing to forecast commercial mortgage defaults. Among the findings, those especially of interest include the influence of contemporaneous loan-to-value and debt-service-coverage ratios on commercial mortgage default probabilities. The paper also finds that option-theoretic models of mortgage pricing are quite capable of producing default estimates that fit the actual default rates well, especially when the model is corrected for originator bias.     

商业银行人力资本效能提升研究

本文通过系统研究人力资本效能相关理论,指出人力资本效能提升是商业银行获得可持续发展的核心,建立科学系统的指标体系是提升人力资本效能的关键,同时人力资本效能提升必须贯穿人力资源管理的全过程.针对人力资本效能现状,本文对存在的问题逐一作了详细的阐述和剖析,认为商业银行应在转变人力资本管理理念、构建人力资本效能衡量指标体系、...     

资产证券化与商业银行盈利能力研究

以中国银行业为研究样本,本文考察了资产证券化对银行盈利的影响。研究发现,资产证券化的发展显著促进了银行盈利增长;资产证券化不仅可以拓宽银行盈利渠道,提高非利息收入在盈利结构中的比重,还可以促使银行强化经营管理能力、优化资产流动性结构、降低风险承担及缓解资本约束,由此提升盈利能力。异质性检验发现,相比上市银行与大型银行,非上市银行和中小银行更易从资产证券化的盈利增长效应中获益。基于时间变化趋势的检验结果显示,在发行首笔资产支持证券之后,资产证券化对银行盈利增长的促进作用逐步增强。本文提出,应基于资产证券化的功能定位完善制度体系,审慎看待资产证券化的发展,同时对具有不同风险承担能力的中小银行实施差异化的金融创新政策。     

商业银行经济资本管理理论和实践探索

经济资本管理基于资本的稀缺性和高成本性,具有效益约束和风险约束的双效应。近年来,银行管理领域发生的最为显著的变化是,其管理重点逐渐过渡到以风险度量和资本优化配置为核心的全面风险管理。经济资本是贯穿风险度量和资本优化配置这一过程的关键概念,不仅可以提高商业银行的资本管理水平,而且通过发挥经济资本在商业银行经营管理中的预算管理、资源配置和绩效考核作用,推动我国商业银行向现代商业银行转变。从长远看,推行经济资本管理将对商业银行和金融监管当局产生重大的深远影响。     

Commercial Mortgage Default: A Comparison of Logit with Radial Basis Function Networks

This article explores the use of artificial neural networks in the modeling of foreclosure of commercial mortgages. The study employs a large set of individual loan histories previously used in the literature of proportional hazard models on loan default. Radial basis function networks are trained (estimated) using the same input variables as those used in the logistic. The objective is to demonstrate the use of networks in forecasting mortgage default and to compare their performance with that of the logistic benchmark in terms of prediction accuracy. Neural networks are shown to be superior to the logistic in terms of discriminating between good and bad loans. The study performs sensitivity analysis on the average loan and offers suggestions on further improving prediction of defaulting loans.     

Financial Integration of Large- and Small-Cap Stocks in Emerging Markets

This study examines the financial integration of large- and small-cap stocks in twenty-three emerging markets to determine their degree of market integration with the world market. The international asset pricing model cannot be rejected for most large-cap stock portfolios, but it is rejected for small-cap stock portfolios. The findings also demonstrate that super-large-cap stocks have the fewest pricing errors and their global financial integration has increased in recent years. In sum, the empirical results indicate that global market integration is primarily associated with the super-large-cap stocks of large emerging markets.     

资本充足率监管与商业银行经营目标的路径选择

满足资本充足率监管要求和实现盈利是商业银行需要完成的两个基本经营目标。本文建立了单期模型,从理论角度分析了商业银行是如何通过调整资本金水平、存贷款总量以及风险偏好等不同的路径选择来实现上述双重经营目标。文章对我国商业银行近年来的经营行为进行实证分析表明,依靠股东注资、上市融资和发行次级债的方式已成为有效补充商业银行资本金以达到资本充足率监管要求的中长期主要路径,而调整存贷款总量和贷款组合的风险偏好是调节商业银行资本充足率水平的短期工具。在此基础上,指出国有商业银行完成上述双重基本指标是一项涉及政府、监管机构和商业银行三位一体的系统工程。     

资本充足率监管与商业银行经营目标的路径选择

满足资本充足率监管要求和实现盈利是商业银行需要完成的两个基本经营目标。本文建立了单期模型，从理论角度分析了商业银行是如何通过调整资本金水平、存贷款总量以及风险偏好等不同的路径选择来实现上述双重经营目标。文章对我国商业银行近年来的经营行为进行实证分析表明，依靠股东注资、上市融资和发行次级债的方式已成为有效补充商业银行资本金以达到资本充足率监管要求的中长期主要路径．而调整存贷款总量和贷款组合的风险偏好是调节商业银行资本充足率水平的短期工具。在此基础上，指出国有商业银行完成上述双重基本指标是一项涉及政府、监管机构和商业银行三位一体的系统工程，     

银行资本监管与商业银行风险——对中国13家商业银行的实证研究

通过构建模型对2000～2005年我国商业银行风险与资本充足率变化进行实证检验，结果表明，我国实施银行资本监管能够促使已达到最低监管要求的银行提高资本充足率和降低银行风险，但对于达不到监管要求的银行，实施银行资本监管并不能促使其提高资本充足率和降低风险水平。实施银行资本监管不是我国商业银行风险降低的原因，资本监管在市场化程度较高的银行中会失效。市场及投资者并不因为银行资本充足率变化而对上市银行的收益或价值的评价产生变化。改革我国商业银行产权制度、建立显性的存款保险制度、加强市场约束是我国商业银行降低风险、提高资本监管有效性的基础。     

Under-specified Models and Detection of Discrimination: A Case Study of Mortgage Lending

This study examines how omitted variables affect underwriting models the OCC estimates during fair lending examinations. The purpose is to assess the effects of omitted variable bias common to most studies of discrimination in mortgage lending. The results show omitted variables have an important impact on both the estimate of the effect of race and on the identification of outliers for review. Further, there appears to be no consistent patterns to the direction of these impacts. This suggests that it is inappropriate to make generalizations concerning the direction of bias based on assumptions about correlations between omitted variables and race.     

Degree of Integration Between Brent Oil Spot and Futures Markets: Intraday Evidence

We investigate the integration of oil spot and futures markets using matched, intraday data to avoid nonsynchronous trading issues. Our evidence indicates highly integrated spot and futures markets. Economic shocks that arise in spot markets are quickly transmitted to the futures markets approximately one-for-one. Most of the reaction occurs within minutes. Similarly, economic shocks arriving in futures markets are transmitted to spot markets one-for-one, once again, within minutes consistent with market efficiency. In general, our findings indicate well-functioning, well-integrated spot and futures oil markets that are informationally efficient and that perform the functions of both price discovery and risk transfer. To the best of our knowledge, this is the first article to work with precisely matched customized data in futures markets, specifically oil futures markets.     

流动性过剩下美国次贷危机的原因与借鉴

2007年美国的次贷危机展现了现代金融风险错综复杂的特征.反思危机,本文认为在流动性过剩背景下,为追求利润的持续快速增长,商业银行很容易出现过度竞争,放松信贷标准,盲目扩大贷款客户群体,追逐高风险、高收益的投资品种和业务创新.对照我国银行业面临的宏观形势,流动性过剩也是困扰我国商业银行持续盈利和发展的一个外在因素.因此,借鉴美国次贷危机,作者提出以下建议:密切关注客观经济形势;加强内控制度建设,强化审慎合规经营理念;高度重视住房抵押贷款的风险;加速资产证券化的试点和推广,有效分散信贷风险;切实做好风险防范,加强全面风险管理;严格信贷标准和要求等.     

借助资本市场发展我国商业银行的策略探讨

商业银行与资本市场之间存在一种既竞争又融合的关系.本文首先分析了当前我国资本市场的发展现状,在此基础上重点讨论了资本市场的发展对商业银行构成的挑战和机遇:资本市场的发展分流了商业银行信贷客户和存款资金,使商业银行面临更大的经营风险和竞争压力;同时,资本市场的发展有利于商业银行负债业务、资产业务和表外业务的拓展、资产质量的改善和资产结构优化.作者最后提出了借助资本市场发展商业银行的具体策略,包括负债业务证券化、积极争取同业存款、创新信贷业务品种、大力拓展表外业务、信贷资产证券化、银行资本证券化、完善信息技术系统建议、加快人才培养和创新市场营销等.     

对我国商业银行规模经济的理论与实证研究

针对困扰我国理论界和实业界的商业银行规模经济问题,本文结合我国商业银行实际提出了衡量商业银行规模经济的基本框架和理论模型。理论和实证研究表明,资本、风险和资产质量是商业银行规模效益的重要影响因素,在商业银行规模效益的计量中必须综合考虑。同时,作者提出,近年来随着我国国有商业银行经营管理效率提高和风险管理水平的提升,规模经济状况得到了明显的改善;但股份制商业银行规模经济效益出现了震荡徘徊现象。因此,我国商业银行改革必须在资本、风险和管理三维框架内进行,只有各方共同努力,才能提高我国商业银行规模经济水平,提升我国商业银行的竞争力。