新闻驱动的量化投资

本文讨论了在香港股市中利用新闻软信息进行量化处理并进行统计套利的量化投资策略,提出了测量新闻消息作者情绪的统计学指数,以及测量新闻消息与证券的相关的统计学指数,以及新闻消息对相关证券影响方向（正、负面或者中性）的指数。本文证明在香港股票市场上存在着利用这些指数进行统计套利的机会。     

用SDP研究欧式看涨期权的定价问题

一、引言 给定标的资产的信息,研究这个标的资产的衍生证券的价格是经济研究的一个核心问题,假定标的资产遵循布朗运动,运用无套利理论,Black-Scholes公式给了我们一个非常明确的答案,这时候也会产生一个问题,对于标的资产价格变动不做任何假设的话,仅仅使用无套利理论,那么:已知标的资产的K个时刻的价格,由此得出衍生证券一般收益函数,问这个衍生证券价格的最可能的最好的界是多少?     

AR-GARCH模型在证券套利中的运用

套利在金融领域尤其是在西方比较成熟的市场是一种主流的投资方式,在我国金融市场尤其是证券领域中,利用统计方法制定统计套利策略,相关的实证研究正逐步兴起。本文尝试使用一个比较适合的方法进行统计回归,并将不同的股票筛选组合成由包含三支股票的证券组合和一支目标股票构成的资产组合,再采用AR-GARCH模型对中心化的价差序列进行拟合,并得到以2σ为交易信号的最优阈值,从而得出能较为稳定地获得收益的结论。     

住房抵押贷款支持证券的定价方法研究

住房抵押贷款支持证券是创新型的房地产衍生金融产品,能有效化解房地产市场的金融风险和扩大房地产融资渠道。对住房抵押贷款支持证券的定价展开研究,分析了基于无套利理论的市场价值定价法,并总结了市场价值定价法在我国现阶段的应用所存在的困难。     

Stephen A.Ross资产定价理论文献综述

<正>资产定价是财务学研究的重点领域,也是现代证券投资理论的核心,Stephen A.Ross对资产定价进行了深入的研究。本文从两个方面对相关文献进行整理:一是从假设和应用等方面对资本资产定价模型提出质疑,二是套利定价理论的提出和实证检验。     

我国银行业不良资产证券化的定价研究

针对不良资产证券化中的关键问题——证券的定价,利用无套利分析的方法对不良资产证券的发行利率进行了推导,建立了我国不良资产证券的定价模型。通过实证分析得出我国银行业的部分不良资产实施证券化是可行的。另外,设计的不良资产证券同我国目前已经发行的资产支持证券相比,各指标基本是一致的,设计也是合理的。     

我国证券投资基金套利行为与市场效应分析

在超常规、创造性发展的政策引导下,我国证券投资基金业得到了迅速的发展,也推动了证券市场的稳健运行.但近年出现的"基金黑幕"、"羊群行为",尤其是股权分置改革以来的短期资金套利现象,干扰了市场的正常秩序,一定程度上造成了市场的波动.要规范我国证券投资基金的发展,就应分析目前的套利机理与市场效应,为建立套利行为的长效机制,从而促进证券市场有效性的提高奠定理论基础.     

中国资本市场多策略套利的研究

资本市场做空机制的引入使得投资者不再局限于单向做多的策略,而是可以通过套利对冲,获得稳定的收益。本文研究中国资本市场目前可行的几种套利策略,包括期现套利策略、统计套利策略、定向增发套利、大宗交易套利以及并购套利,对多策略套利方法在中国资本市场的运用进行了深入分析。     

大连商品交易所大豆压榨利润套利的实证研究

本文首次利用大连商品交易所大豆压榨利润,对大商所大豆、豆粕和豆油之间的跨品种套利交易进行了实证研究,研究结果显示,三者之间存在套利机会:利用压榨利润20日移动平均线的交易策略多头套利和空头套利收益显著为正,但利用5日移动平均线的交易策略只有空头套利交易收益显著为正,两种情形下,空头套利交易收益平均大于多头套利交易。     

套利限制对股票错误定价的影响研究

本文从形成套利限制的基础要素出发,将套利限制划分为交易成本、交易风险和交易约束,研究了不同维度套利限制对股票错误定价的影响。结果显示：在对错误定价具有正向影响的各细分维度套利限制中,交易约束起主导作用;股价高估情形下,交易约束对错误定价的影响起主导作用,交易成本则具有负向影响;低估情形下,交易成本起主导作用,各细分维度套利限制与错误定价的相关关系与高估情形相反,呈现显著的非对称关系;各细分维度套利限制通过改变投资者买卖行为导致了这一现象。本文首次探究了不同维度套利限制对错误定价的影响,并将T+1交易制度引发的套利限制纳入研究范围,为套利活动和我国资本市场基础制度改革提供相关建议。     

Price reversal,transaction costs,and arbitrage profits in the real estate securities market

This paper studies the return reversals of exchange traded real estate securities using an arbitrage portfolio approach. Using the approach, we find that there exist significant return reversals in such securities. These return reversals could be exploited by arbitrage traders if trading costs can be ignored. However, the arbitrage profits disappear after deducting trading costs and taking into account the implicit cost of bid-ask spread. Thus, the real estate securities market is efficient at weekly intervals in the sense that one could not exploit the price reversals via some simple trading rules.     

投资者异质性与证券市场定价——理论模型与中国的经验证据

本文从投资者异质性的客观现实出发,通过对投资者二维视角的交叉分类与相关行为的探讨,提出了一种按交易特点与行为依据的新的分类方案,即将投资者分为套利交易者、价格预期交易者和量能变动交易者三类。在此基础上分别建立了各类投资者的需求函数,通过对证券市场供求函数的讨论,利用均衡分析方法构建了基于投资者异质性的证券市场定价模型,并以我国证券市场1999-2011年的月度数据为样本进行了实证分析。实证结果表明:我国证券市场价格主要由价格预期交易者的诱导性策略行为与量能变动交易者的羊群行为决定,套利交易者的套利行为对市场价格没有显著的影响,证券市场扩容也未对市场价格的形成产生系统性冲击。     

Are performance based arbitrage effects detectable? Evidence from merger arbitrage

This paper examines the predictions of the performance based arbitrage hypothesis for the merger arbitrage market. Performance based arbitrage [Shleifer, A., Vishny, R.W., 1997. The limits of arbitrage. Journal of Finance, 52 (1), 35–55] is the notion that funds under management are withdrawn from arbitrageurs following trading losses, resulting in inefficient prices for securities subject to arbitrage trades. I examine general comovement in merger arbitrage spreads and the response of spreads to large arbitrage losses and substantial changes in deal flow. I find little evidence that merger arbitrage spreads exhibit systematic comovement or are substantially affected by important liquidity events in this market.     

Rating agencies in the face of regulation

This paper develops a theoretical framework to shed light on variation in credit rating standards over time and across asset classes. Ratings issued by credit rating agencies serve a dual role: they provide information to investors and are used to regulate institutional investors. We show that introducing rating-contingent regulation that favors highly rated securities may increase or decrease rating informativeness, but unambiguously increases the volume of highly rated securities. If the regulatory advantage of highly rated securities is sufficiently large, delegated information acquisition is unsustainable, since the rating agency prefers to facilitate regulatory arbitrage by inflating ratings. Our model relates rating informativeness to the quality distribution of issuers, the complexity of assets, and issuers' outside options. We reconcile our results with the existing empirical literature and highlight new, testable implications, such as repercussions of the Dodd-Frank Act.     

上市公司信息环境和分析师的盈利预测——来自中国上市公司的经验证据

分析师在证券市场中扮演着重要角色,而上市公司信息环境则直接将影响分析师作用的发挥。本文研究了我国上市公司信息环境对分析师预测行为的影响。实证研究表明：公司信息环境越差,证券分析师将越少使用历史会计信息,分析师向证券市场传递的增量信息就越多,相对历史会计信息而言,分析师预测信息的竞争力就越高。由于国内研究上市公司信息环境的文章相对较少,所以本文为国内分析师的盈利预测及相关研究提供了一个新视角。     

THE MAGNITUDE OF PRICING ERRORS IN THE ARBITRAGE PRICING THEORY

In this paper the arbitrage pricing theory (APT) pricing errors for individual securities are estimated employing maximum likelihood factor analysis and Fama-MacBeth style aggregation. Results show that the pricing errors are large and statistically significant and that there is a high degree of variability in pricing errors across securities. This evidence contradicts the prevailing APT intuition that the pricing errors can be ignored as negligible. Pricing errors are also found to be related to residual variance and firm size.     

Common stock repurchases and market signalling: An empirical study

This paper examines the pricing behavior of securities of firms which repurchase their own shares. The results are consistent with a market in which investors price securities such that expected arbitrage profits are precluded. The results are also consistent with the hypothesis that firms offer premia for their own shares mainly in order to signal positive information, and that the market uses the premium, the target fraction and the fraction of insider holdings as signals in order to price securities around the announcement date. The observation that repurchases via tender offer are followed by abnormal increases in earnings per share and that mainly small firms engage in repurchase tender offers, provides further support for the signalling hypothesis.     

Tax Arbitrage and the Existence of Equilibrium Prices for Financial Assets

In models where both investors and securities are subject to differential taxation, there may be no set of prices that rule out infinite gains to trade, or “tax arbitrage.” This paper characterizes the joint restrictions on financial-asset returns and investors' tax schedules that preclude tax arbitrage in the absence of short-sale constraints. The authors show that, if there exists any configuration of marginal tax rates on investors' tax schedules that rule out infinite gains to trade, then “no-tax-arbitrage” prices will exist. They also show that the existence of “no-tax-arbitrage” prices ensures the existence of equilibrium prices.     

The aftermath of public attention on accounting improprieties: Effects on securities class action settlements

This research examines the effect on securities case settlements from the public focus on accounting fraud immediately following Enron and other large accounting debacles. In addition, to the extent that an ‘Enron-effect’ occurred, behavioral theory suggests that such an effect would likely dissipate over time. Therefore, I also investigate whether in very recent years an impact from the prior attention on accounting fraud diminishes with the passage of time. Results indicate that following the increased media and public attention upon accounting fraud, characteristics of securities cases that were the focus of this increased attention are associated with incrementally higher settlement amounts - specifically large cases involving financial restatements and cases involving intentional misstatements, i.e., accounting irregularities.Findings regarding whether an ‘Enron-effect’ has dissipated with the passage of time are mixed. Overall, results contrast with prior research, which did not find support for an ‘Enron-effect’ on securities case settlements, and suggest that future events that capture public attention may cause defendants in certain securities cases to pay higher amounts, not necessarily because of their own culpability.     

证券市场会计信息披露问题探讨

会计信息披露制度是证券市场制度体系的重要组成部分.规范的会计信息披露,对我国证券市场健康有序地发展至关重要.探究证券市场财务会计信息披露过程当中存在的问题及原因,以期寻求解决的方案和对策.