Information and capital asset pricing

Investors in a market frequently update their diverse perceptions of the values of risky assets, thus invalidating the classic capital asset pricing model's (CAPM) assumption of complete agreement among investors. To accommodate information asymmetry and belief updating, we have developed an empirically testable information-adjusted CAPM, which states that the expected excess return of a risky asset/portfolio is solely determined by the information-adjusted beta rather than the market beta. The model is then used to analyze empirical anomalies of the classic CAPM, including a flatter relation between average return and the market beta than the CAPM predicts, a non-zero Jensen's alpha, insignificant explanatory power of the market beta, and size effect.     

我国证券投资基金的积极资产组合管理能力研究

本文以19支开放式基金和23支封闭式基金为研究样本,通过改进PCM模型,设计适用于非有效市场或弱有效市场的指标S,来考察我国证券投资基金在2005年1月1日至2007年6月30日这段研究区间内的积极资产组合管理能力,并对开放式基金和封闭式基金的积极资产组合管理能力进行比较分析.研究发现,开放式基金和封闭式基金均有较强的积极资产组合管理能力;封闭式基金的积极资产组合管理能力整体要高于开放式基金,特别是在上涨和震荡行情中;同时,市场走势的波动也会对基金的积极资产组合管理能力产生一定的影响.     

我国证券投资基金的积极资产组合管理能力研究

本文以19支开放式基金和23支封闭式基金为研究样本,通过改进PCM模型,设计适用于非有效市场或弱有效市场的指标S,来考察我国证券投资基金在2005年1月1日至2007年6月30日这段研究区间内的积极资产组合管理能力,并对开放式基金和封闭式基金的积极资产组合管理能力进行比较分析。研究发现,开放式基金和封闭式基金均有较强的积极资产组合管理能力;封闭式基金的积极资产组合管理能力整体要高于开放式基金,特别是在上涨和震荡行情中;同时,市场走势的波动也会对基金的积极资产组合管理能力产生一定的影响。     

Optimal Time to Sell in Real Estate Portfolio Management

This paper examines the properties of optimal times to sell a diversified real estate portfolio. The portfolio value is supposed to be the sum of the discounted free cash flows and the discounted terminal value (the discounted selling price). According to Baroni et al. (Journal of Property Investment and Finance 25(6):603–625, 2007b), we assume that the terminal value corresponds to the real estate index. The optimization problem corresponds to the maximization of a quasi-linear utility function. We consider three cases. The first one assumes that the investor knows the probability distribution of the real estate index. However, at the initial time, he has to choose one deterministic optimal time to sell. The second one considers an investor who is perfectly informed about the market dynamics. Whatever the random event that generates the path, he knows the entire path from the beginning. Then, given the realization of the random variable, the path is deterministic for this investor. Therefore, at the initial time, he can determine the optimal time to sell for each path of the index. Finally, the last case is devoted to the analysis of the intertemporal optimization, based on the American option approach. We compute the optimal solution for each of these three cases and compare their properties. The comparison is also made with the buy-and-hold strategy.

A Benchmark Approach to Portfolio Optimization under Partial Information

This paper proposes a filtering methodology for portfolio optimization when some factors of the underlying model are only partially observed. The level of information is given by the observed quantities that are here supposed to be the primary securities and empirical log-price covariations. For a given level of information we determine the growth optimal portfolio, identify locally optimal portfolios that are located on a corresponding Markowitz efficient frontier and present an approach for expected utility maximization. We also present an expected utility indifference pricing approach under partial information for the pricing of nonreplicable contracts. This results in a real world pricing formula under partial information that turns out to be independent of the subjective utility of the investor and for which an equivalent risk neutral probability measure need not exist.      

The Fundamental Review of the Trading Book: Implications for Portfolio and Risk Management in the Banking Sector

The Fundamental Review of the Trading Book (FRTB) is the promised overhaul of bankmarket risk regulation. FRTB retains the authorized use of proprietary risk models, however, it introduces two additional criteria: (i) P&L attribution (PLA) tests and (ii) desk-level backtests. We examine empirically whether these additional criteria influence risk management and portfolio management practice, specifically portfolio construction and choice of risk model. We find that the PLA tests demand significant alignment with risk factors, however, the backtests do not incentivize use of superior risk models. This has important implications for the efficacy of the capital-based regulatory system.     

Market Performance Measures and Disclosure of Private Management Information in Capital Markets

Thispaper examines the optimal disclosure policyin a principal/agent setting in which investors and a managerdirectly receive pre-decision, non-contractible signals. Themanager's signal is more informative than the investors' signal.Under no disclosure, the market price provides contractible informationabout the investors' signal, whereas it does not reveal the investors'signal if the manager fully and truthfully discloses his signal.The Revelation Principle does not apply and we identify conditionsunder which no disclosure dominates full disclosure, and providea ``hurdle' model in which partial disclosure strictly dominatesboth no and full disclosure.     

信息技术在研究生档案管理中的应用

在经济飞速发展、网络技术日新月异的时代背景下,信息技术对研究生档案管理也产生了影响,本文首先介绍研究生的档案管理现状和特征,之后阐述信息技术对研究生档案管理的影响,最后提出利用信息技术提升研究生档案管理.     

信息技术在商业银行信用风险管理中的应用

信用风险是我国商业银行长期以来面临的主要风险,近年来我国银行业在推进信用风险管理的历程中,整体上面临着方法论和实现路径两大课题.信息技术的应用在我国银行业信用风险管理演进中发挥了重要的支撑作用,并最终成为新型信用风险管理技术的普遍实施路径.当前商业银行的信用风险管理处在向模型化转型的关键时期,信息技术体系也正处于重构的重要阶段,在同步升级信用风险管理与重新构建信息技术体系的过程中,信用风险管理技术的应用范围要从传统产品扩充到衍生产品、形成具有可操作性的资产组合风险管理功能、实现信用风险管理在资本层面应用,最终完成新型管理技术的内化.