中央银行沟通的金融市场响应──基于股票市场的事件研究

本文使用事件研究法分析我国中央银行沟通行为对股票价格走势的影响。研究发现,影响确实存在且影响方向和力度与央行沟通方式以及股票市场背景有关。具体而言:(1)书面沟通影响显著,口头沟通则无明显作用;(2)宽松性政策信息沟通产生了正向影响,紧缩性信息沟通影响为负;(3)沟通事件的影响主要体现为一种短期作用,并伴随着即时效应、预知效应和滞后效应;(4)在熊市或牛市的不同市场背景下,央行沟通对股价的影响存在非对称性。结果表明,央行的沟通手段对金融市场有重要影响。     

The dynamics of portfolio management contracts

We consider the multiperiod relationship between a client anda portfolio manager and the resulting problem of motivatinga manager of unknown ability to acquire valuable information.We explore the contractual form and the optimal retention policyof the client and find that the optimal initial set of contractsfeatures a smaller performance based fee component paid to themanager than in a first-best contract, and the contract choiceelicits only partial information about the manager. As a result,ex post performance measurement is critical to future recontracting.In general, managers are retained only if the returns on theirportfolio exceed the benchmark by an appropriate amount.     

Vocational skills in the accounting professional profile: the Chartered Institute of Management Accountants (CIMA) employers' opinion

The increasingly dynamic environment in which accountants work has necessitated a reorientation of accounting education. In some countries this issue has raised great interest amongst accounting educators and practitioners. The ongoing debate has already resulted in the publication of several statements and research papers that have raised the question of the relevance of the role of vocational skills in accounting education. Examples of these vocational skills are communication skills, interpersonal skills, and problem-solving skills. This paper reports on the importance that the employers of management accountants gave to a specified set of vocational skills and capabilities and the level of ability of these skills exhibited by students. In order to prioritize future developments an integrated analysis of the two attributes, importance and exhibited level, is enabled by the use of strategic mapping. The results of this study suggest that the employers perceive deficiencies in several capabilities that they have identified as being quite important. These deficiencies exist, in the employers' opinion, both prior to recruitment and on professional qualification. The research also indicates that, in the opinion of these employers, the development of these skills should be a central concern for universities and professional bodies. The employers also indicated that vocational skills should be attained in an integrated way.     

Stabilizing non-fundamental asset price movements under discretion and limited information

Inflation, output and interest rate stabilization are all potential central bank objectives. We explore whether monetary policy should respond to asset price fluctuations when they are driven by irrational expectational shocks to the future returns to capital. In our model, an optimistic shock to future returns generates both an increase in equity prices and physical investment. The increased investment is inefficient and, thus, a central bank optimally responds to this expectations shocks. This induces a trade-off between stabilizing nominal prices and non-fundamental asset price movements. We compare the optimal policy under different assumptions: full versus limited information and commitment versus discretion. If the central bank has limited information about whether an asset price movement has a fundamental or non-fundamental origin, then the central bank responds less aggressively to the non-fundamental exuberance shocks than under full information. Without commitment, a central bank responds more aggressively to non-fundamental exuberance shocks.     

Monetary policy transmission in vector autoregressions: A new approach using central bank communication

In this paper, we study the role played by central bank communication in monetary policy transmission. We employ the Swiss Economic Institute’s Monetary Policy Communicator to measure the future stance of the European Central Bank’s monetary policy. Our results indicate, first, that communication has an influence on inflation (expectations) similar to that of actual target rate changes. Communication also plays a noticeable role in the transmission of monetary policy to output. Consequently, future work on monetary policy transmission should incorporate both a short-term interest rate and a communication indicator. A second finding is that the monetary policy transmission mechanism changed during the financial crisis as the overall effect of monetary policy on (expected) inflation and output is weaker and of shorter duration during this period compared to the overall sample period.     

A dynamic model of active portfolio management with benchmark orientation

This paper studies optimal dynamic portfolios for investors concerned with the performance of their portfolios relative to a benchmark. Assuming that asset returns follow a multi-linear factor model similar to the structure of Ross (1976) [Ross, S., 1976. The arbitrage theory of the capital asset pricing model. Journal of Economic Theory, 13, 342–360] and that portfolio managers adopt a mean tracking error analysis similar to that of Roll (1992) [Roll, R., 1992. A mean/variance analysis of tracking error. Journal of Portfolio Management, 18, 13–22], we develop a dynamic model of active portfolio management maximizing risk adjusted excess return over a selected benchmark. Unlike the case of constant proportional portfolios for standard utility maximization, our optimal portfolio policy is state dependent, being a function of time to investment horizon, the return on the benchmark portfolio, and the return on the investment portfolio. We define a dynamic performance measure which relates portfolio’s return to its risk sensitivity. Abnormal returns at each point in time are quantified as the difference between the realized and the model-fitted returns. Risk sensitivity is estimated through a dynamic matching that minimizes the total fitted error of portfolio returns. For illustration, we analyze eight representative mutual funds in the U.S. market and show how this model can be used in practice.     

中国的利率体系与利率市场化改革

利率对宏观经济均衡和资源配置有重要导向意义。央行确定政策利率要符合经济规律、宏观调控和跨周期设计需要。目前,中国的真实利率略低于经济增速,处于较为合理水平。中国已形成较为完整的市场化利率体系,主要通过货币政策工具调节银行体系流动性,释放政策利率调控信号,在利率走廊的辅助下,引导市场基准利率以政策利率为中枢运行,并通过银行体系传导至贷款利率,调节和优化资源配置,实现货币政策目标。中国具备继续实施正常货币政策的条件,将尽可能地延长正常货币政策的时间,目前不需要实施资产购买操作。在市场化利率体系中,收益率曲线非常重要,它反映利率由短及长的期限结构,可为各类金融产品和市场主体提供定价参考。收益率曲线的短端为货币市场基准利率,直接受央行货币政策操作的影响;长端则为国债收益率,主要反映市场对未来宏观经济走势的预期。经过多年发展,我国的国债收益率曲线应用日益广泛,整体趋于成熟,而在市场基础方面还有进一步提升的空间。     

Portfolio selection with a drawdown constraint

When identifying optimal portfolios, practitioners often impose a drawdown constraint. This constraint is even explicit in some money management contracts such as the one recently involving Merrill Lynch’ management of Unilever’s pension fund. In this setting, we provide a characterization of optimal portfolios using mean–variance analysis. In the absence of a benchmark, we find that while the constraint typically decreases the optimal portfolio’s standard deviation, the constrained optimal portfolio can be notably mean–variance inefficient. In the presence of a benchmark such as in the Merrill Lynch–Unilever contract, we find that the constraint increases the optimal portfolio’s standard deviation and tracking error volatility. Thus, the constraint negatively affects a portfolio manager’s ability to track a benchmark.     

中央银行透明化政策与宏观经济稳定

在通胀预期管理背景下,构建中国2001~2013年中央银行信息交流指数,考量中央银行透明化政策影响宏观经济稳定机制。结果表明,央行增加信息交流有利于宏观经济稳定,某些情况下甚至超过实际干预的效果。因此,我国央行应进一步提高货币政策透明度并培育规范的中央银行信息交流机制。     

A Framework for Corporate Treasury Performance Measurement

Corporations generally do not have a formal process for evaluating the effectiveness of their treasury departments in managing debt. To the extent that corporate borrowing decisions are predicated on "market timing" rather than matching the interest rate sensitivity of the firm's liabilities to that of its assets, the firm is effectively making bets on interest rates that should be monitored and evaluated.
The author has developed an approach that allows for periodic reporting of treasury's performance to investors and that also provides a framework for treasury to compare and choose among alternatives in the capital markets. The basic idea is to calculate a company's liability return and then establish a benchmark portfolio that allows measurement of relative performance. For a nonfinancial corporation, a useful benchmark can be constructed using the collective debt obligations of the company's industry peers. The assumption underlying this benchmark is that the financing of the industry as a whole is designed to produce an "optimal" asset-liability configuration and net exposure to interest rates.     

Optimal insurance contract and coverage levels under loss aversion utility preference

This study develops an optimal insurance contract endogenously and determines the optimal coverage levels with respect to deductible insurance, upper-limit insurance, and proportional coinsurance, and, by assuming that the insured has an S-shaped loss aversion utility, the insured would retain the enormous losses entirely. The representative optimal insurance form is the truncated deductible insurance, where the insured retains all losses once losses exceed a critical level and adopts a particular deductible otherwise. Additionally, the effects of the optimal coverage levels are also examined with respect to benchmark wealth and loss aversion coefficient. Moreover, the efficiencies among various insurances are compared via numerical analysis by assuming that the loss obeys a uniform or log-normal distribution. In addition to optimal insurance, deductible insurance is the most efficient if the benchmark wealth is small and upper-limit insurance if large. In the case of a uniform distribution that has an upper bound, deductible insurance and optimal insurance coincide if benchmark wealth is small. Conversely, deductible insurance is never optimal for an unbounded loss such as a log-normal distribution.     

我国货币政策框架转型中货币市场基准利率体系构建研究

随着利率市场化的推进以及货币政策框架由数量型向价格数量型并重转型,当前我国急需尽快培育有效的基准利率,以疏通货币政策传导渠道,提高货币政策调控效果。本文通过理论分析和实证研究,得出如下结论：我国货币政策框架转型中构建的基准利率,必须是个包含长短期利率的组合基准利率体系;我国货币市场利率虽然还不完全具备基准利率的要素,但是在基准利率体系中具有重要地位;当前我们可以7天回购作为政策利率、以shibor作为货币市场基准利率,同时,应加快完善市场和政策环境以培育shibor的基准性。     

“逆周期因子”提高了人民币汇率中间价的市场基准地位吗？——基于时变溢出指数的实证研究

为了对冲外汇市场情绪的顺周期波动,缓解市场中的羊群效应,中国人民银行于2017年5月26日在人民币汇率中间价报价中引入"逆周期因子"。本文基于TVP-VAR模型,构造了时变的溢出指数,通过量化分析方法考察了"逆周期因子"对人民币汇率中间价基准地位的影响。研究发现,第一,"逆周期因子"的引入导致人民币中间价对其他汇率的溢出效应降低,中间价的基准地位被削弱。第二,从整个人民币汇率体系来看,"逆周期因子"的引入提高了汇率体系的总体溢出水平,系统的联动效应增强。第三,"逆周期因子"的引入对短期汇率体系的影响大于对长期汇率体系的影响。基于此,本文提出了应进一步完善"逆周期因子"的构成,实现逆周期与保持中间价基准地位并存等政策建议。     

浅谈Shibor与利率互换市场发展

Shibor已经成为利率互换交易重要的基准利率,且其基准性的确立和以其为基准的互换市场的发展相辅相成,互相促进：我国当前以Shibor为基准的互换交易印证Shibor已经具有一定的基准性;同时,以Shibor为基准互换市场的发展也依赖于Shibor基准性的培育。展望未来,应继续增强其基准性,明确Shibor定价中各因素的风险权重,以促进利率互换市场的进一步发展。     

Accruals Management to Avoid Losses

This study examines whether firms engage in accruals management to beat the zero earnings benchmark from the perspective of earnings per share (EPS). Based on net income scaled by lagged market value of equity (E/MV) to define just‐miss and just‐beat test bins, previous studies provide no or inconclusive evidence of accruals management to beat the zero earnings benchmark. I conjecture that because managers focus on shares scaled earnings performance rather than market value scaled earnings performance, forming test bins based on EPS instead of E/MV is a better approach to detect accruals management. As expected, I find evidence of accruals management to beat the zero EPS benchmark. I also find that firms are more likely to manipulate accruals when managers have stronger incentives to beat the zero EPS benchmark. In addition, accruals of firms just beating the zero EPS benchmark are more likely to reverse the next year, resulting in relatively lower future earnings for firms just beating the benchmark compared with firms just missing the benchmark.     

央行货币政策报告文本信息、宏观经济与股票市场

本文利用金融情感词典和文本分析技术,分析中国人民银行货币政策执行报告的文本情绪、文本相似度和文本可读性等多维文本信息,刻画央行货币政策执行报告的文本特征,探究货币政策报告的文本信息与宏观经济和股票市场的关系。实证研究发现,货币政策报告的文本情绪的改善会引起显著为正的股票市场价格反应,报告文本相似度的增加会引起股票市场波动性的显著降低,报告可读性对公布后股票市场的波动性影响不显著。货币政策报告文本情绪还与诸多宏观经济指标显著相关。进一步研究发现,引起股票市场显著反应的是报告文本情绪中反映货币政策指引的部分,而反映宏观经济历史状态的部分对股票市场的影响不显著。本文从文本大数据分析角度证明了我国央行沟通的有效性,对国内央行沟通相关研究形成了有益补充。     

Statistical arbitrage with optimal causal paths on high-frequency data of the S&P 500

This paper develops the optimal causal path algorithm and applies it within a fully-fledged statistical arbitrage framework to minute-by-minute data of the S&P 500 constituents from 1998 to 2015. Specifically, the algorithm efficiently determines the optimal non-linear mapping and the corresponding lead–lag structure between two time series. Afterwards, this study explores the use of optimal causal paths as a means for identifying promising stock pairs and for generating buy and sell signals. For this purpose, the established trading strategy exploits information about the leading stock to predict future returns of the following stock. The value-add of the proposed framework is assessed by benchmarking it with variants relying on classic similarity measures and a buy-and-hold investment in the S&P 500 index. In the empirical back-testing study, the trading algorithm generates statistically and economically significant returns of 54.98% p.a. and an annualized Sharpe ratio of 3.57 after transaction costs. Returns are well superior to the benchmark approaches and do not load on any common sources of systematic risk. The strategy outperforms in the context of cryptocurrencies even in recent times due to the fact that stock returns contain substantial information about the future bitcoin returns.     

Pricing of index options under a minimal market model with log-normal scaling

Abstract

This paper describes a two-factor model for a diversified market index using the growth optimal portfolio with a stochastic and possibly correlated intrinsic timescale. The index is modelled using a time transformed squared Bessel process with a log-normal scaling factor for the time transformation. A consistent pricing and hedging framework is established by using the benchmark approach. Here the numeraire is taken to be the growth optimal portfolio. Benchmarked traded prices appear as conditional expectations of future benchmarked prices under the real world probability measure. The proposed minimal market model with log-normal scaling produces the type of implied volatility term structures for European call and put options typically observed in real markets. In addition, the prices of binary options and their deviations from corresponding Black–Scholes prices are examined.     

Effective risk communication and CCS: the road to success in Europe

Over the past ten years or so, there have been multiple attempts to site and build carbon capture and storage (CCS) facilities in Europe, North America and elsewhere. To date, most of those attempts have not been successful. In Europe, for example, there are currently no commercial CCS facilities in operation. There are a number of reasons for this, ranging from lack of political will, the collapsing price of CO₂, lack of commercial drivers to capture and store CO₂, and public opposition to the proposed facilities. There have been several case studies examining the communication challenges associated with the siting of CCS facilities. Up till now, most of this research has been carried out by climate change or carbon policy experts as well as social researchers rather than scientists representing the wider risk communication community, aside from some notable exceptions. This study does the opposite by examining CCS from a broader risk communication perspective. It provides a brief overview of risk communication theory in order to situate some of the findings of the CCS communication research, and then, it makes some recommendations on how the siting of CCS facilities could be improved including the importance of trust, proactive communication and early stakeholder involvement. In conclusion, this study notes that if the science associated with the technology is communicated in the correct manner and if the key risk communication recommendations are adhered to, then the siting of future CCS facilities should be successful.     

The information content of Eonia swap rates before and during the financial crisis

Before August 2007, implied forward rates in the overnight interest swap rates closely reflected market expectations about the future path of the Eonia, and therefore, about the future course of the ECB’s monetary policy stance. Nevertheless, this link was weakened considerably during the most acute episode of the financial crisis. Using the expectations hypothesis of the term structure as a benchmark model for the determination of the overnight interest swap rates, we find that after May 2010 the monetary transmission mechanism was partially restored when the ECB implemented various ‘unconventional measures’ in response to the financial crisis. On the contrary, liquidity and credit risks are still present in unsecured deposit markets, distorting the pricing and transmission of the ECB monetary policy stance along the Euribor rates. These results should be of interest for regulators, financial institutions, and researchers in European money markets.