THE RISK STRUCTURE OF INTEREST RATES AND INTERDEPENDENT BORROWING COSTS: THE IMPACT OF MAJOR DEFAULTS

This paper develops a new methodology for evaluating the impact of economic events on bond yields. Term structure information and implicit forward rates are used to generate expected bond yields, and the difference between actual and expected yields is interpreted as the information effect of the event. The methodology is applied to two studies of municipal default: the New York City default and the more recent Washington Public Power Supply System (WPPSS) default. The analysis provides evidence that the New York City default did have a significant impact on the interest cost of municipal financing in general. In the case of WPPSS, however, there is no indication of a significant default impact.     

AN EXAMINATION OF THE YIELD SPREAD BETWEEN INSURED AND UNINSURED DEBT

Currently, municipal bonds insured by major insurance firms receive the highest credit rating from rating agencies. The interest rates on regular triple-A municipal bonds, however, have been persistently below those of insured bond issues. The yield spread between insured and uninsured triple-A bonds in the tax-exempt market is examined here, and it is shown that the yield spread may be attributable to split ratings and default-related risks.     

Default risk cannot explain the Muni puzzle: evidence from municipal bonds that are secured by U.S. treasury obligations

Fama (1977) and Miller (1977) predict that one minus the corporatetax rate will equate after tax yields from comparable taxableand tax-exempt bonds. Empirical evidence shows that long-termtax-exempt yields are higher than theory predicts. Two popularexplanations for this empirical puzzle are that, relative totaxable bonds, municipal bonds bear more default risk and includecostly call options. I study U.S. government secured municipalbond yields which are effectively default-free and noncallable.These municipal yields display the same tendency to be too high.I conclude that differential default risk and call options donot explain the municipal bond puzzle.     

The Behavior of the Interest Rate Differential Between Tax-exempt Revenue and General Obligation Bonds: A Test of Risk Preferences and Market Segmentation

This paper presents evidence that the yield differential between revenue bonds and similar general obligation bonds varies contracyclically with the level of economic activity. The evidence also indicates that significant investor-borrower induced market segmentation exists in the municipal bond market. An increase in the relative demand by commercial banks for tax-exempt securities and/or an increase in the supply of revenue bonds relative to the supply of general obligation bonds increase the yield spread between the two classes of debt. These findings were the result of a series of empirical tests with both macroeconomic and microeconomic data.     

Liquidity,default, taxes,and yields on municipal bonds

We examine the effects of liquidity, default and personal taxes on the relative yields of Treasuries and municipals using a generalized model with liquidity risk. The municipal yield model includes liquidity as a state factor. Using a unique transaction dataset, we estimate the liquidity risk of municipals and its effect on bond yields. Empirical evidence shows that municipal bond yields are strongly affected by all three factors. The effects of default and liquidity risk on municipal yields increase with maturity and credit risk. Liquidity premium accounts for about 9–13% of municipal yields for AAA bonds, 9–15% for AA/A bonds and 8–19% for BBB bonds. A substantial portion of the maturity spread between long- and short-maturity municipal bonds is attributed to the liquidity premium. Ignoring the liquidity risk effect thus results in a severe underestimation of municipal bond yields. Conditional on the effects of default and liquidity risk, we obtain implicit tax rates very close to the statutory tax rates of high-income individuals and institutional investors. Furthermore, these implicit income tax rates are quite stable across bonds of different maturities. Results show that including liquidity risk in the municipal bond pricing model helps explain the muni puzzle.     

Municipal bonds: a contingent claims perspective

The purpose of this paper is to provide an overview of the municipal bond market with an emphasis on the numerous embedded contingent claims. Embedded contingent claims include the standard call features, sinking funds, the advance refunding option, the synthetic advance refunding option, the credit risk option (default risk), marketability, and the numerous tax-related events. Municipal bond investors must carefully assess the relative value of these contingent claims before investing in municipal bonds. Also, due to unique risk premiums within the municipal bond market, it is important to carefully structure the municipal bond holdings, paying particular attention to duration, within the context of an overall financial plan. There appears to be a benefit to lengthening the duration of the municipal bond portion of the portfolio.     

The changing long-run linkage between yields on Treasury and municipal bonds and the 1986 Tax Act

The Tax Act of 1986 changed the tax treatment of tax-exempt municipal bonds for banks. Since banks were the dominant participant in the municipal bond market until 1986, some believe that this resulted in a breakdown of the long-run equilibrium relationship between municipal and US Treasury securities of equal maturity. We present evidence that there was a significant structural break in the relationship between municipal and Treasury bonds around the time of the Tax Act. This break is characterized by both a shift in the mean and a flattening of the slope parameter that links the two interest rates in a long-run equilibrium relationship.     

The Role and Impact of Financial Advisors in the Market for Municipal Bonds

Significantly more and more issuers of municipal bonds use the services of financial advisors during the bond issuance process. We investigate the benefits to issuers and market participants arising from the role of financial advisors in the issuance of municipal bonds. Using a large sample of 9,493 tax-exempt municipal bonds, we show that financial advisors have significant impact on borrowing costs, reoffering yields and underwriter gross spreads. Our results are more pronounced for revenue bonds, particularly for negotiated revenue issues. In addition, our results show significant advantages to using a financial advisor for refunding issues supporting the view that financial advisors play important roles for more complex issues. Our results are consistent with the interpretation that financial advisors provide important and useful services resulting in monitoring and information asymmetry reduction benefits accruing to issuers and market participants.      

Taxes,Default Risk,and Yield Spreads

This paper develops a model of bond prices and yield spreads that incorporates the effect of both taxes and differences in default probabilities. The tax loss consequences of default are recognized. Traditionally, tax-free (municipal) bond yields have been viewed as linearly related to taxable yields with a slope coefficient equal to one minus the tax rate and the intercept representing differences in default risk. While our model supports the linearity assumption, it implies that the slope and intercept are both functions of both the break-even tax rate and the default probability(ies). Clientele effects among both municipal and taxable bonds are demonstrated. Finally, the implied marginal tax rates and the implied default probabilities are estimated for different categories of municipal bonds.     

债券违约对流动性影响的传染效应研究

2014年以来我国信用债市场违约事件频发,信用风险的积聚可能引发债券市场流动性恶化。本文以2014―2019年交易所和银行间市场信用债为研究对象,实证考察违约事件对债券流动性影响的传染效应。研究发现:违约事件在同一发行主体的债券之间具有流动性传染效应,当公司的某期债券出现违约时,公司其他未到期债券的流动性水平显著下降;违约事件对同行业其他公司债券的流动性具有传染效应,当行业中出现债券违约事件时,行业内其他公司的债券流动性显著降低;违约事件爆发越密集或者违约事件越严重,对债券流动性的负面影响越大,而且民营企业债受到的影响要大于国有企业债,低信用等级债受到的影响要大于高信用等级债;在市场密集爆发违约事件或出现较为严重的违约事件时期,宏观流动性增加能够改善债券流动性。     

Municipal Bond Liquidity and Default Risk

This paper examines the pricing of municipal bonds. I use three distinct, complementary approaches to decompose municipal bond spreads into default and liquidity components, and find that default risk accounts for 74% to 84% of the average spread after adjusting for tax‐exempt status. The first approach estimates the liquidity component using transaction data, the second measures the default component with credit default swap data, and the third is a quasi‐natural experiment that estimates changes in default risk around pre‐refunding events. The price of default risk is high given the rare incidence of municipal default and implies a high risk premium.     

我国企业债券违约的特征趋势、融资特点及风险处置机制研究

本文从债券违约的数量规模、行业分布、地域分布、企业属性、债券品种及违约率等方面阐述了我国企业债券违约的特征趋势,分析了我国企业债券违约的主要原因及其所呈现出来的融资特点,探讨了我国企业债券违约后的五种处置方式,认为我国债券违约风险处置机制还不完善,缺少独立法律制度、处置的市场化程度较低、投资者保护机制不健全、对发行人缺乏硬性约束,影响了违约债券的整体兑付水平,投资人利益难以得到有效维护。建议采取多种措施降低债券违约发生率、优化发行人融资结构、建立债券违约的市场化处置机制,以降低债券违约风险,推动债券市场健康发展。     

The Resiliency of the High-Yield Bond Market: The LTV Default

This paper investigates the resiliency of the new-issue high-yield bond market by examining the changes in implied default rates of such bonds before and after the largest high-yield bond default, i.e., the LTV bankruptcy. Specifically, the paper compares implied default probabilities of high-yield bonds during the post-LTV period calculated from actual new-issue yields with instrumental default probabilities calculated on the assumption that the default had not occurred. A comparison of these probabilities reveals that the market's perception of default on the high risk segment of the bond market increased significantly after the LTV bankruptcy. However, the effect was transitory, lasting only six months. Thus, the market was resilient to a major default.     

Are Tax Effects Important in the Long-Run Fisher Relationship? Evidence from the Municipal Bond Market

Are nominal bonds appropriately discounted for taxes? Empirical estimates of the response of nominal interest rates to changes in inflation, the Fisher effect, have failed to produce a definitive answer. Four reasons have been put forward as possible explanations: (i) Tobin effects, (ii) fiscal illusion, (iii) peso problems, and (iv) different estimators. Utilizing data on taxable and tax-exempt bond interest rates and several different estimators, we find that the Fisher effect estimates are always larger for the taxable bond relative to the tax-exempt bond, suggesting that fiscal illusion and different estimators cannot account for the previous results.     

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.     

Bond Yields,Taxes, and the Dimensions of Default Risk

This work develops and empirically estimates models of bond yields subject to default risk. Parameters for the probability of survival and the recovery rate subsequent to default are included in a model of corporate bond yields that allow a study of interactions among them. The municipal version of the model includes the tax rate as an additional factor. Empirical evidence is found that supports the notion that both dimensions of default, considered jointly, are related to bond quality. In addition, statistically significant differences in tax rates suggest that higher tax rates are associated with higher grade municipal bonds.     

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。     

Orange County Bankruptcy: Financial Contagion in the Municipal Bond and Bank Equity Markets

We examine the spillover wealth effects of the Orange County, California bankruptcy announcement in December 1994 on municipal bonds, municipal bond funds, and bank stocks. This bankruptcy is prominent because of unprecedented losses and because it was caused by a highly leveraged derivatives strategy rather than a shortage of tax revenues and excess spending. We find contagion in the bond market with significantly negative abnormal returns for municipal bond funds without direct exposure to Orange County and for non‐Orange County municipal bonds. In addition, our findings suggest the contagion spills over to the common stocks of investment and commercial banks that deal in or use derivatives; however, the equities of banks unexposed to derivatives are not affected.     

Price Dynamics and Information Flows in Strategically-Linked Debt Instruments: The NOB and MOB Constituents

We examine information flows between the constituents of the NOB (notes-over-bonds) and MOB (municipals-over-bonds) futures spreads. The results suggest a bicausal relationship between notes and bonds and a unicausal relationship from bonds to municipals. Shocks in the bond market have a large impact on the municipal and note markets, whereas shocks in the municipal or note markets have a smaller impact on the bond market. Volatility spillover from bonds to notes and municipals is detected. We also find significant volatility persistence in all three markets. Spread trades are found to have an asymmetric influence on notes and municipal futures variance.     

On the Value of Municipal Bond Insurance: An Empirical Analysis

Using a large sample of municipal bond data from 2001 to 2010 in the U.S., this paper documents the time variation of the value of municipal bond insurance, estimated from the insured and uninsured bonds yield at issue differentials. We find that insured municipal bonds carry significant lower yields at issue compared to those of the equivalent uninsured bonds before 2008. However, this cost saving disappeared with the aftermath of the subprime credit crisis. We find that the supply of bonds and the level of market interest rates to have significant positive impacts on the time‐varying value of bond insurance. We also detect asymmetric response of these yield differentials to rises and declines of market interest rates. Economic intuition suggests that the value of municipal bond insurance is a function of business cycles but our tests support the contrary, which may be explained by the habitat preference of municipal bonds issues.