CB – Time Dependent Markov Model for Pricing Convertible Bonds

In this paper, we propose what we call the convertible bond (CB) – timedependent Markov model, which prices N given individual convertible bondssimultaneously, and apply it to Japanese convertible bond data. One of themain features of the model is that it makes full use of the correlationstructure of convertible bond prices. The empirical results show that themodel well describes individual prices in the market.     

Do Inflation‐Linked Bonds Still Diversify?

The diversifying power of inflation-linked (IL) bonds relative to traditional asset classes has changed significantly. In this paper, we study the dynamics of conditional volatilities and correlations for three asset classes, IL bonds, nominal bonds and equities, in the USA and Europe. Using a DCC-MVGARCH for the period 1997–2007, we highlight the change that took place in 2003. Although IL bonds once had definite diversification power, they are now highly correlated with nominal bonds and have reached similar volatility levels. As a result, the two asset classes are practically substitutable. This seems to be due to more stable inflation expectations and to a more liquid IL bond market. Although diversification was a valuable reason for introducing IL bonds in a global portfolio before 2003, this is no longer the case. Dynamic portfolio optimisation using our estimates of conditional correlations and volatilities clearly demonstrates that the optimal weight of IL bonds in a portfolio decreased sharply in 2003 in favour of nominal bonds and equities.     

Volatility‐Spillover Effects in European Bond Markets

Volatility spillover from the US and aggregate European bond markets into individual European bond markets using a GARCH volatility‐spillover model is analysed. Strong statistical evidence of volatility spillover from the US and aggregate European bond markets is found. For EMU countries, the US volatility‐spillover effects are rather weak (in economic terms) whereas the European volatility‐spillover effects are strong. The bond markets of EMU countries have become much more integrated after the introduction of the euro, and in recent years they have become close to being perfectly integrated. The main driver of the integration appears to be convergence in interest rates.     

担保机制对固定收益企业债信用等级迁移的影响

采用 logistic 回归模型对担保机制就固定收益企业债信用等级迁移的影响予以检验,研究结果表明,企业偿债能力和盈利能力指标的变化都对企业债的信用等级迁移具有显著影响,尤其应该关注资产负债率的变化,而在财务指标一定的条件下,没有抵押或担保的企业债发生信用降级的概率会增大,说明担保机制的存在确实会使得担保债获得更高的信用等级。     

可转换债券发行动机研究述评

在国际学术界,用于解释可转换债券发行动机的研究成果有资产替代假说、评估风险假说,后门融资假说与阶段性融资假说。同国外比起来,我国在可转换债券发行动机方面的研究还较少,研究方法的角度还有待改善。全面深入地弄清可转换债券发行动机,无论对发行可转换债券企业,还是对鼓励和扶持可转换债券都很有意义。     

运营时滞、债务协商和可转债融资企业投资决策研究

在运营时滞的背景下,将债务协商机制引入到利用股权和可转债融资的上市企业,建立动态模型分析企业的投资问题。数值分析表明：在相同的运营时滞下,如果股东谈判能力较弱（强）,相比于破产清算,债务协商会加速（推迟）投资;项目首次投资成本和股东谈判能力会同时影响运营时滞与企业投资水平之间的关系。当首次投资成本低时,随着运营时滞增加,较强（弱）的股东谈判能力会推迟（加速）投资;当首次投资成本较高时,运营时滞增加会推迟投资,但股东谈判能力越强,推迟程度越小;债务协商可以提高实物期权价值,并且实物期权价值和股东谈判能力成正比,和运营时滞成反比。     

扩大北京市城市建设资金来源发行城市建设债券势在必行

作者认为，扩大北京市城市建设资金来源，发行城市建设债券势在必行，并对市政债券的用途，发行债券可能带来的问题及需要解决的问题进行了分析。     

Insider employee stock option trading and stock prices

The question of which factors determine corporate bonds pricing is investigated by analysing the spreads of eurobonds issued by major G-10 companies during the 1991–2001 period. Three main results emerge from the analysis. First, bond ratings appear as the most important determinant of yield spreads, with investors’ reliance on rating agencies judgments increasing over time. Second, the primary market efficiency and the expected secondary market liquidity are not relevant explanatory factors of spreads cross-sectional variability. Finally, rating agencies adopt a different, ‘through the cycle’, evaluation criteria of default risk with respect to the forward looking one adopted by bond investors.     

并购重组需要发挥并购基金和高收益债券等债券产品的作用

中国人民银行、银监会等机构从2009年开始设立并购基金,引导和支持金融机构积极参与企业并购重组业务等活动,鼓励规范上市公司通过并购重组,促进资源整合和有效配置。当前应进一步解决支付手段单一和手续繁琐而导致的融资困难等瓶颈问题,同时应加大开发高收益债券等债券产品力度,使其发挥更大的作用。     

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.