Coherent decision analysis with inseparable probabilities and utilities

This article explores the extent to which a decision maker's probabilities can be measured separately from his/her utilities by observing his/her acceptance of small monetary gambles. Only a partial separation is achieved: the acceptable gambles are partitioned into a set of belief gambles, which reveals probabilities distorted by marginal utilities for money, and a set of preference gambles, which reveals utilities reciprocally distorted by marginal utilities for money. However, the information in these gambles still enables us to solve the decision maker's problem: his/her utility-maximizing decision is the one that avoids arbitrage (i.e., incoherence or Dutch books).     

程序化交易及其风险分析

随着国内股指期货市场的推出,程序化交易逐渐进入国内广大投资者的视线。程序化交易的优势令人赞叹,围绕其风险的争议也使人畏惧。首先介绍了程序化交易的国内外现状和发展历程,然后回顾了国际上几十年来对程序化交易风险的争论,接着着重分析了我国发展程序化交易面临的风险并给出了相应的应对措施。     

行为金融理论的应用:重要异象探讨

为了对充斥于现实金融市场的标准金融学无法解释的大量异象给出更加合理的解释,并且对实践起到指导作用,尝试从实证的角度研究解释行为金融学所谓的市场异象,并且得出了有实证支持,角度新颖且与标准金融学理论相左的结论。相对于传统的标准金融学,行为金融学对投资者理性的设定和市场现象的研究更加符合实际,所以具有更加重要的理论和实践意义。     

现代投资组合理论模型的比较研究

对证券组合理论的Markowitz均值-方差模型以及均衡时关于资产的期望收益率的资本资产定价模型(CAPM)和套利定价理论(APT),进行了深入地比较研究,同时从动态投资组合理论,基于VaR的投资组合理论以及行为投资组合理论三个领域阐述了现代投资组合理论的新进展,并对其未来的发展进行了展望。     

资产结构的基本分类与清算价值的基本衡量

公司账面价值与清算价值的偏离程度和公司资产结构类型之间存在着高度的关联关系,不同的偏离程度通常对应着不同的资产结构类型。公司的资产结构类型可划分为强金融资产、强实物资产、强无形资产三种基本类型。其中,强金融资产结构类型公司账面价值与清算价值之间的偏离程度最小,最易于衡量。所以,基于清算价值衡量的股权资本套利模型通常会在强金融资产结构类型类公司中应用。     

Price Manipulation and Quasi‐Arbitrage

In an environment where trading volume affects security prices and where prices are uncertain when trades are submitted, quasi‐arbitrage is the availability of a series of trades that generate infinite expected profits with an infinite Sharpe ratio. We show that when the price impact of trades is permanent and time‐independent, only linear price‐impact functions rule out quasi‐arbitrage and thus support viable market prices. When trades have also a temporary price impact, only the permanent price impact must be linear while the temporary one can be of a more general form. We also extend the analysis to a time‐dependent framework.     

论行为财务学的范式创新

行为财务学范式是对标准财务学范式的革命.标准财务学的范式包括"理性人"、"偏好稳定"、"不考虑财务人的情绪对资本市场资产价格的影响"、"有效套利"和"有效市场".行为财务学的范式包括"有限理性"、"偏好不稳定"、"财务人的情绪严重影响资本市场的资产价格"、"有限套利"和"市场并不有效".行为财务学的范式对资本市场的大量异象和财务人偏好非理性心理学实验结果有较合理的理论解释力.并有一定理论的预见力.行为财务学原理已经被大量运用去指导财务人财务管理行为与实践.     

行为金融学理论发展研究概述

20世纪80年代以来行为金融学逐渐兴起,传统金融理论受到严峻的挑战。阐述行为金融学产生的背景及其基本观点,重点分析行为金融学的核心理论——前景理论和有限套利理论,概括出行为金融学的六大主要理论模型。     

Information Aggregation in Dynamic Markets With Strategic Traders

This paper studies information aggregation in dynamic markets with a finite number of partially informed strategic traders. It shows that, for a broad class of securities, information in such markets always gets aggregated. Trading takes place in a bounded time interval, and in every equilibrium, as time approaches the end of the interval, the market price of a “separable” security converges in probability to its expected value conditional on the traders' pooled information. If the security is “non‐separable,” then there exists a common prior over the states of the world and an equilibrium such that information does not get aggregated. The class of separable securities includes, among others, Arrow–Debreu securities, whose value is 1 in one state of the world and 0 in all others, and “additive” securities, whose value can be interpreted as the sum of traders' signals.     

有摩擦多期证券市场中的无套利资产定价

产定价理论是现代金融学的核心内容,资产定价的两个基本方法是现代的无套利方法和传统的均衡方法。本文对存在买卖价差、成比例交易费和固定交易费三种摩擦的多期证券市场,用无套利方法研究资产定价理论。分别对不存在套利和不存在强套利的市场,建立了资产定价的基本定理。