Pairs trading in the UK equity market: risk and return

In this paper, we provide the first comprehensive UK evidence on the profitability of the pairs trading strategy. Evidence suggests that the strategy performs well in crisis periods, so we control for both risk and liquidity to assess performance. To evaluate the effect of market frictions on the strategy, we use several estimates of transaction costs. We also present evidence on the performance of the strategy in different economic and market states. Our results show that pairs trading portfolios typically have little exposure to known equity risk factors such as market, size, value, momentum and reversal. However, a model controlling for risk and liquidity explains a far larger proportion of returns. Incorporating different assumptions about bid-ask spreads leads to reductions in performance estimates. When we allow for time-varying risk exposures, conditioned on the contemporaneous equity market return, risk-adjusted returns are generally not significantly different from zero.     

银行背景董事与可转债融资: 中国的证据

基于我国的金融环境,将银行背景董事的来源分为五大行和非五大行两种类型,以此考察不同来源的银行背景董事对可转债融资的影响是否存在差异。研究发现：来自五大行的银行背景董事对可转债融资申请是否被证监会审核通过不会产生显著影响,而来自非五大行的银行背景董事具有显著的正面影响,但是,在可转债融资后的经营业绩上,两者都不会产生显著的积极影响。这表明银行背景董事的作用,主要来自于非五大行的银行背景董事,并且,发挥的作用有限,仅体现了其咨询功能,而非监督功能。     

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。     

上市公司可转换公司债券融资决策研究

基于全流通背景和上市公司集中的股权结构特征,从理论和实证两方面分析了中国上市公司可转债融资决策机制,结果表明在股权流通的背景下,通过可转债方式融资并成功转股,需要上市公司具有较高的盈利前景,否则融资后会降低控制性股东的融资收益,这一条件使得可转债融资方式失去了原有的吸引力。但可转债灵活的条款设计和转股前较低的资金使用成本受到了一些暂时难以进行增发融资的上市公司青睐——可以通过缩短初始转股期、降低初始转股价、放松向下修正转股价条款、严格赎回条款与回售条件等手段,提高可转债转股的可能性,从而间接地实现股权融资的目的。     

Characteristics of Risk and Return in Risk Arbitrage

This paper analyzes 4,750 mergers from 1963 to 1998 to characterize the risk and return in risk arbitrage. Results indicate that risk arbitrage returns are positively correlated with market returns in severely depreciating markets but uncorrelated with market returns in flat and appreciating markets. This suggests that returns to risk arbitrage are similar to those obtained from selling uncovered index put options. Using a contingent claims analysis that controls for the nonlinear relationship with market returns, and after controlling for transaction costs, we find that risk arbitrage generates excess returns of four percent per year.     

Arbitrage Bounds and UK Unit Trust Performance

Abstract:  We use the arbitrage performance bounds of Ahn, Cao and Chretien (2003) to evaluate UK unit trust performance between January 1988 and December 2002. We find that trust performance is sensitive to the admissible stochastic discount factor used for both the average trust and the majority of individual trusts. The investment style, size, load charge, and annual charge of the trust all have an impact on trust performance. We find for some trusts, the Jensen (1968) and Ferson and Schadt (1996) measures do not satisfy arbitrage bounds by the base assets.     

My global fund portfolio is not yours: the effect of home bias on European- and US-managed convertible bond fund exposures

This paper shows that global convertible bond funds (CBFs) and their resulting equity-bond exposures are regionally biased. Global bond fund managers display home bias, resulting in CBFs that are not only tilted towards the home market but also reflect the different bond-equity exposures of European and US convertibles. More specifically we find that global funds managed by a European asset management firm are more bond-like than global funds managed by a US-based asset manager. Hence, investors have to account for the asset management company's origin to avoid that the performance of the fund and its correlation with other assets is not in line with investor's ex ante expectations about globally managed portfolios. Our results also indicate that for investors of European-based CBFs this home bias has resulted in an ex post opportunity cost up to 1.38% per year, depending on the sample period.     

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.     

Risk Changes around Calls of Convertible Bonds

We examine changes in equity and asset betas around convertible bond calls and report two major findings. First, calling firms exhibit an increase in asset betas following the call. We argue that the finding is consistent with the implications of the sequential financing theory but not of the backdoor equity financing theory. Second, abnormal returns at call announcements are negative only for the subsample of firms that also exhibit an increase in equity beta. We conclude that risk changes help explain the market reaction to convertible bond calls.     

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。     

The Performance of Hedge Fund Strategies and the Asymmetry of Return Distributions

We present hedge fund performance estimates that adjust for stale prices, Fama‐French risk factors and skewness. We contrast these new performance estimates with traditional performance measures. Using three‐factor models to adjust for staleness in prices and to incorporate Fama‐French factors along with the Harvey‐Siddique (2000) two‐factor model that incorporates skewness, we find that for the period 1990–2003, all hedge fund categories achieve above average performance when measured against an aggregate market index. More significantly, however, when we estimate performance at the individual hedge fund level, we discover that only 40 to 47% of the funds are shown to achieve an above average performance over that time period depending on the model used. These results have important implications for investors, endowments and pensions when they choose hedge fund managers.     

Arbitrage risk and market efficiency

This article explores arbitràge risk and models a testable hypothesis for studies in the treasury bill futures market efficiency. The modern mean-variance theory applied to a hedged arbitrage portfolio is used for the analysis. For a given expected arbitrage profit, we derive minimum variance arbitrage (MVA) conditions. A minimum variance arbitrage line (MVAL) is then derived to show the risk-return tradeoff for arbitrage. Market efficiency conditions are discussed by taking into account arbitrage risk along with bid-ask spreads. The analysis in this study helps explain the puzzle of inefficiencies in the T-bill futures market. Because refinancing and variation margin (due to marking-to-market) are required for arbitrage using futures trading in general, our ex ante arbitrage model using the case of T-bill futures can be applied to other futures markets.     

Credit ETFs in Mutual Funds and Corporate Bond Liquidity

We show that high yield (HY) mutual funds own and trade ETFs to manage liquidity needs driven by fund flows, whereas investment grade (IG) funds do not. The use of ETFs by HY mutual funds to manage liquidity shifts some trading away from bonds and into ETFs, which reduces the liquidity of the underlying bonds. This substitution effect outweighs the better-understood inclusion effect, whereby bond liquidity benefits from increased ETF ownership, such that the net effect of ETFs is to reduce HY liquidity. In IG, the substitution effect is not significant and ETFs result in increased bond liquidity.     

Conditioning Information and European Bond Fund Performance

In this paper we evaluate the performance of European bond funds using unconditional and conditional models. As conditioning information we use variables that we find to be useful in predicting bond returns in the European market. The results show that, in general, bond funds are not able to outperform passive strategies. These findings are robust to whatever model (unconditional versus conditional and single versus multi‐index) we use. The multi‐index model seems to add some explanatory power in relation to the single‐index model. Furthermore, when we incorporate the predetermined information variables, we can observe a slight tendency towards better performance. This evidence is consistent with previous studies on stock funds and comes in support of the argument that conditional models might allow for a better assessment of performance. However, our results suggest that the impact of additional risk factors seems to be greater than the impact of incorporating predetermined information variables.     

Arbitrage and the Evaluation of Linear Factor Models in UK Stock Returns

I examine the impact of the no arbitrage restriction on the estimation and evaluation of linear factor models in UK stock returns. The no arbitrage restriction reduces volatility and eliminates most of the negative values of the fitted stochastic discount factor models. All of the factor models are rejected and there are significant differences in the pricing performance between models under the no arbitrage restriction. The no arbitrage restriction can have a significant impact on both the parameter estimates and pricing errors for some models.     

Profit Possibilities in Currency Markets: Arbitrage, Hedging, and Speculation

This paper reviews and extends the existing literature on covered arbitrage, delineates the conditions for profitable arbitrage with the hedging instruments of forward and options contracts in the foreign exchange markets, and defines the maximum possible profits out of a given market environment. Next, the simple rules on speculation are articulated with and without transaction costs, and then we show how speculation can be covered with options and forwards. Finally, speculation is integrated with arbitrage and hedging, and further compounding of profit possibilities is illustrated.     

The Behavior of an Institutional Investor with Arbitrage Opportunities and Liquidity Risk

This study analyzes the efficiency of liquidity flows in stabilizing distressed markets from a theoretical perspective. We show that even in the event of a major negative market shock, a financial institution can increase its investment in the market when there is a strong incentive for arbitrage profit. However, the institution may choose to reduce its investment if the fear from liquidity risk exceeds the arbitrage incentive. In addition, our model reveals a positive relationship between funding liquidity and market liquidity. Our findings help to explain several financial issues in distressed markets, including the flight to quality, liquidity dry-ups, asset fire sales, and market shock amplifications.