股票期权激励机制的利弊分析

股票期权制度作为一种长期激励机制,是解决由于所有权与经营权分离所引起的委托人与代理人之间利益冲突的有效机制,但在实践中也存在着诸多的弊端。本文分析了实施股票期权制度的利弊,指出我国企业引进股票期权制度必须注意的问题。     

Option pricing in the moderate deviations regime

We consider call option prices close to expiry in diffusion models, in an asymptotic regime (“moderately out of the money”) that interpolates between the well‐studied cases of at‐the‐money and out‐of‐the‐money regimes. First and higher order small‐time moderate deviation estimates of call prices and implied volatilities are obtained. The expansions involve only simple expressions of the model parameters, and we show how to calculate them for generic local and stochastic volatility models. Some numerical computations for the Heston model illustrate the accuracy of our results.     

基于Merton模型的存款保险定价研究

存款保险制度的核心是存款保险费率的厘定。本文以Merton存款保险定价的看跌期权模型为基础,引入监管宽容和未保险存款的利率两个参数,给出了商业银行存款保险定价公式。选择不同的银行对其保险费率进行估算,所得的保险费率之间有一定的差距,表明不同银行的存款保险费率是不同的,中国不适合单一费率,而适合风险费率。本文对我国正在酝酿出台的存款保险制度具有一定的指导意义。     

基于期权思想的融券费率定价方法研究

证券融资融券交易是成熟证券市场普遍实施的一种交易制度。融券与融资不同,其标的不是资金而是证券,但两者都是信用业务,需要为相关交易支付一定的费用,融资的利率相对容易确定,而融券费率则比较复杂一些,目前各类管理规定中对此并没有明确的说法。本文借鉴了我国台湾地区的经验,计算出我国大陆地区试行融资融券可行的融券费率。     

基于3T理论的城市创意产业发展路径研究

我国城市化进程中出现的城市制造能力和创造能力的严重不匹配,致使一些城市经济发展处于产业链的低端。近20年来,西方城市大力推进创意产业这一新经济战略概念,其成果证明文化创意与城市经济发展关系密切。研究创意产业的3T理论,并结合我国城市发展的实际情况,试图打破城市对于传统发展模式的路径依赖,为我国城市创意产业经济的可持续发展提供现实的路径选择。     

绿色经济发展中政府介入时机与政策选择——基于技术采用均衡时间的比较静态分析

发展绿色经济推进经济转型是实现科学发展的核心。市场自身转型的滞后是影响绿色经济发展的重要因素。转型具有公共物品的性质,公共财政的本质意味着政府介入从而消除滞后的合意性。绿色新技术采用的滞后是造成转型滞后的关键,新技术采用路径的均衡时间受多种因素影响从而滞后的程度也就不同;但均衡时间的比较静态分析结果表明,新技术创新的强度、市场需求、贴现率、技术采用成本、既有生产成本以及企业行为等因素的改变都会影响均衡的采用时间,这些都为政府的介入提供了基础。     

论我国企业跨国并购的战略选择

随着我国企业实力的不断增强和竞争的加剧,越来越多的企业走出国门,开展跨国并购。企业开展跨国并购有利于获取我国经济发展所需的短缺资源和企业发展所需的技术、品牌和市场。目前,国内国际形势和国家政策导向都十分有利于企业"走出去"开展跨国并购。但由于我国企业规模小、实力弱及国内外文化环境、政治经济环境差异大,企业跨国并购也面临许多障碍。我国企业跨国并购要想取得成功,必须在并购主体、目标市场、并购行业、并购对象和并购方式等方面做出正确的战略选择,同时,我国政府也需要出台一些相应的扶持和鼓励措施。     

Option Pricing in ARCH-type Models

ARCH models have become popular for modeling financial time series. They seem, at first, however, to be incompatible with the option pricing approach of Black, Scholes, Merton et al., because they are discrete-time models and possess too much variability. We show that completeness of the market holds for a broad class of ARCH-type models defined in a suitable continuous-time fashion. As an example we focus on the GARCH(1,1)-M model and obtain, through our method, the same pricing formula as Duan, who applied equilibrium-type arguments.     

American option valuation under stochastic interest rates

By applying Ho, Stapleton and Subrahmanyam's (1997, hereafter HSS) generalised Geske–Johnson (1984, hereafter GJ) method, this paper provides analytic solutions for the valuation and hedging of American options in a stochastic interest rate economy. The proposed method simplifies HSS's three-dimensional solution to a one-dimensional solution. The simulations verify that the proposed method is more efficient and accurate than the HSS (1997) method. We illustrate how the price, the delta, and the rho of an American option vary between the stochastic and non-stochastic interest rate models. The magnitude of this effect depends on the moneyness of the option, interest rates, volatilities of the underlying asset price and the bond price, as well as the correlation between them. This revised version was published online in June 2006 with corrections to the Cover Date.     

On the Rate of Convergence of Discrete‐Time Contingent Claims

This paper characterizes the rate of convergence of discrete‐time multinomial option prices. We show that the rate of convergence depends on the smoothness of option payoff functions, and is much lower than commonly believed because option payoff functions are often of all‐or‐nothing type and are not continuously differentiable. To improve the accuracy, we propose two simple methods, an adjustment of the discrete‐time solution prior to maturity and smoothing of the payoff function, which yield solutions that converge to their continuous‐time limit at the maximum possible rate enjoyed by smooth payoff functions. We also propose an intuitive approach that systematically derives multinomial models by matching the moments of a normal distribution. A highly accurate trinomial model also is provided for interest rate derivatives. Numerical examples are carried out to show that the proposed methods yield fast and accurate results.