This study examines the role of information uncertainty (IU) in predicting cross-sectional stock returns. We define IU in terms of "value ambiguity", or the precision with which firm value can be estimated by knowledgeable investors at reasonable cost. Using several different proxies for IU, we show that: (1) On average, High IU firms earn lower future resturns (the "mean" effect), and (2) Price and earnings momentum effects are much stronger among high IU firms (the "interaction" effect). These findings are consistent with theoretical models that feature investor overconfidence (Daniel et al. (1998)) and information cascades (Bikhchandani et al. (1992)). Specifically, our evidence indicates that high IU exacerbates investor overconfidence and limits rational arbitrage.

This paper generalizes the Myers and Majluf (1984) model by introducing an agency cost structure based on private benefits of control. This new model predicts that many corporate finance variables each have opposing effects on under- and overinvestment. Private benefits exacerbate overinvestment but, interestingly, a small amount of private benefits can enhance firm value by alleviating underinvestment. Likewise, an increase in insider ownership alleviates overinvestment but aggravates underinvestment. When private benefits are small, the adverse effect of insider ownership on underinvestment tends to dominate. When there are considerable private benefits, the incentive-alignment effect of insider ownership is pronounced. Additionally, this model reconciles existing equity financing theories on announcement effects. It helps resolve the puzzle that small-growth firms do not seem to have an asymmetric information disadvantage when they issue new equity.

本文通过比较价格操纵行为和价格竞争行为的特点，判断非投机价格时间序列应该具有收益率序列相关、时变条件方差不稳定的特点，并通过经验研究证实了这个判断。

We analyze the possible effect of price limit to informed traders’ behavior and propose three hypotheses caused by price limit. Then comprehensively using the event study method and comparative grouping method, we empirically exams the performance of price limit in China’s stock market. Our finding is that price limit policy will bring significant effect to the trading behavior of insiders, which means price limit policy will impede the fulfillment of insiders’ trading activities and delay equilibrium price discovery.

本文以迅猛发展的全球金融市场为背景，深入分析了证券价格指数体系的多层次、多角度细化发展与不断延伸和拓展中的指数功能，探讨了全球围绕着证券价格指数的种种金融产品创新及其方向，这对我国国内证券价格指数体系的发展和指数产品化创新有着重要的借鉴意义。

Abstract: In this paper, we assume the R&D research for new products and new business models of an entrepreneur will get some cash-flow in the future. And because of the patent protection, the entrepreneur will become a monopolist in that defined market. The successful R&D research represents the growth value for the entrepreneur. We assume that the value of growth is the value of the entrepreneur. The total market value of entrepreneur can be understood as a real growth option plus a discounted real exchange option. The first time in the theory, this paper gets the formula of the real compound option under three stochastic parameters. 关键词：创业企业，增长价值，定价，复合实物期权 Keywords: entrepreneur, growth value, pricing, compound real option

本文认为信用衍生工具风险的特殊性主要在于其双重的信用风险和风险的特殊性。出于对金融稳定的考虑，必须对其进行监管。由于传统的监管体制不适应，风险管理技术的不适应，以及传统上对银行衍生工具表外业务监管银行账簿和交易账簿的划分，信用衍生工具对金融监管提出了挑战。为应对这些挑战，监管应进行相应的监管模式、监管技术、监管方法的改革。

我国金融体制的改革本身就是一个制度变迁的过程，其中包含了各种收益、成本的考量，以及制度变迁条件的成熟。而国债期货作为中国金融市场不断完善所必需的一项金融衍生产品，也是这种制度变迁中的一个缩影和代表。在其第一次制度变迁中虽然由于制度变迁条件与制度构建的不完善而失败，但随着包括现货市场、法律、利率市场化等制度变迁的条件不断成熟，引入国债期货交易制度的时机也在来临。

从国外实践来看，混业经营是大势所趋，但解释混业现象的国外传统理论未能得到实证结果的有力支撑，本文借鉴国外资源基础理论（Resource based theory），结合对欧美一些综合性银行的调查，从客户关系管理（Customer Relationship Management――CRM）角度分析诠释金融混业经营现象，指出混业经营的目的是维持客户关系、有效提升客户价值，其实质是银行实施的以客户为中心的经营管理战略。本文旨在为中国的金融混业探索提供新的研究视角。

鉴于我国公司的融资偏好与西方国家完全相反，黄少安、张岗在《中国上市公司股权融资偏好分析》一文中认为其直接动因在于股权融资的成本大大低于债务融资的成本，但同时在文中对资本成本与融资成本这两个不同的概念进行了混用，进而甚至可以推论出公司股权融资的资本成本小于债券融资的资本成本这一足以推翻资本资产定价模型（CAPM）的“革命性”结论。本文明确区分了作为投资者所要求的必要收益率的资本成本与公司实际筹资所付出的融资成本这两个完全不同的概念，在此基础上通过定性和定量的研究发现：我国公司融资偏好与西方国家不同的直接原因在于我国公司的资本成本的软约束性，其深层次上的主要原因是投资者缺乏投资意识和资本市场缺乏退市机制。