随机利率Vasicek模型下的欧式缺口期权的定价研究

研究随机利率Vasicek模型下欧式缺口期权的定价问题,利用偏微分方程方法给出了欧式缺口看涨期权和看跌期权的定价公式,并且是Vasicek利率模型下标准欧式期权定价公式的一种推广.     

新的广义欧式期权定价模型及其性质

本文提出一种新型期权,称之为随机到期时刻的广义欧式期权.我们证明了新的期权是欧式期权和美式期权的推广.在市场为无摩擦且完备无套利的连续市场时,我们构建了两个理论模型,导出了广义欧式期权的鞅方法定价公式,在适当的条件下,证明了两个模型的结果是一致的.当随机到期时刻与标的资产价值不独立时,给出了几种情形下的广义欧式期权定价公式.针对利率、资产价格、到期时刻等随机因素,定义了两个具体市场模型,导出了在Vasicek短期利率模型下,标的资产价值服从一般It过程等的广义欧式期权定价公式.     

分数跳-扩散模型下的互换期权定价

用保险精算法,在标的资产价格服从分数跳-扩散过程,且风险利率、波动率和期望收益率为时间的非随机函数的情况下,给出了一类多资产期权——欧式交换期权的定价公式．该公式是标准跳扩散模型下的欧式期权及欧式交换期权定价公式的推广．     

分数布朗运动环境下欧式幂期权的定价

本文主要讨论了标的资产受多个分数布朗运动影响的欧式幂期权定价问题:基于风险中性概率测度,给出了在有红利支付且无风险利率及红利率为非随机函数的情况下的两类欧式幂期权定价公式,并分别求出了涨跌欧式幂期权的平价关系.     

混合分数布朗运动环境下短期利率服从vasicek模型的欧式期权定价

本文研究了混合分数布朗运动环境下欧式期权定价问题.运用混合分数布朗运动的Ito公式,得到了Black-Scholes偏微分方程.同时,通过求解Black-Scholes方程,得到了欧式看涨、看跌期权的定价公式。推广了Black-Scholes模型有关欧式期权定价的结论.     

不完全市场下有违约风险的欧式期权定价

本文考虑不完全市场条件下,结合klein(1996)的有违约风险处理方法和Cochrane与Saá-Requejo(2000)的不完全市场处理方法给有违约风险的欧式期权定价,得到不完全市场下有违约风险欧式期权的一般化定价公式,进一步推导出一些特定欧式期权的定价公式,并指出这些公式均为本文公式的特例.     

两股票情形下欧式期权定价新方法

假定股票价格服从布朗运动驱动的随机微分方程,从随机动力学的角度出发考虑欧式期权定价问题.由Fokker-Planck-Kolmogrov得到了股票价格过程的概率转移密度函数,基于此,可以求得两股票情形下各种欧式类型未定权益的定价公式.为欧式期权定价提供了一个新方法.     

次分数Vasicek随机利率模型下的欧式期权定价

本文对经典的B-S模型的假设条件进行放松,在假定利率为随机波动情况下对欧式期权定价进行讨论.作为利率的载体,本文首先对零息票债券进行定价,得出利率风险的市场价格的含义.其次,利用投资组合的?对冲原理构造无风险资产,求得欧式期权在次分数布朗运动驱动的随机利率模型下所满足的偏微分方程.最后,经过变量替换转化为经典的热传导方程,获得了欧式期权定价公式.     

具有变系数和红利的多维Black-Scholes模型

本文提出具有变系数和红利的多维Ｂｌａｃｈ－Ｓｃｈｏｌｅｓ模型,利用倒向随机微分方程和鞅方法,得到欧式未定权益的一般定价公式及套期保值策略,在具体金融市场,给出欧式期权的定价公式和套期保值策略,以及美式看涨期权价格的界。     

鞅分析在具有红利支付的n次幂型欧式期权定价中的应用

本文探讨了鞅分析在具有红利支付的n次幂型欧式期权定价中的应用,即用鞅分析的技巧与方法研究了在标的资产服从分数布朗运动的条件下具有红利支付的n次幂型欧式期权定价问题,并获得了其公式。丰富了已有期权定价结果,使期权定价公式更有利于实际的应用。     

Pathwise random periodic solutions of stochastic differential equations

In this paper, we study the existence of random periodic solutions for semilinear stochastic differential equations. We identify these as the solutions of coupled forward-backward infinite horizon stochastic integral equations in general cases. We then use the argument of the relative compactness of Wiener-Sobolev spaces in C⁰([0,T],L²(Ω)) and generalized Schauder?s fixed point theorem to prove the existence of a solution of the coupled stochastic forward-backward infinite horizon integral equations. The condition on F is then further weakened by applying the coupling method of forward and backward Gronwall inequalities. The results are also valid for stationary solutions as a special case when the period τ can be an arbitrary number.     

Scheduling arrivals to a stochastic service mechanism

We consider the problem of scheduling the arrivals of a fixed number of customers to a stochastic service mechanism to minimize an expected cost associated with operating the system. We consider the special case of exponentially distributed service times and the problems in general associated with obtaining exact analytic solutions. For general service time distributions we obtain approximate numerical solutions using a stochastic version of gradient search employing Infinitesimal Perturbation Analysis estimates of the objective function gradient obtained via simulation.     

A unified approach for different concepts of robustness and stochastic programming via non-linear scalarizing functionals

Abstract

We show that many different concepts of robustness and of stochastic programming can be described as special cases of a general non-linear scalarization method by choosing the involved parameters and sets appropriately. This leads to a unifying concept which can be used to handle robust and stochastic optimization problems. Furthermore, we introduce multiple objective (deterministic) counterparts for uncertain optimization problems and discuss their relations to well-known scalar robust optimization problems by using the non-linear scalarization concept. Finally, we mention some relations between robustness and coherent risk measures.     

Wick型随机广义Burgers方程的确切解

借助白噪声分析、Hermite变换和扩展的双曲函数法,研究了Wick型随机广义Burgers'方程,求出了一些精确的Wick型孤立波解和周期波解.由于Wick型函数难以赋值,为此,我们得到一些特殊情形下的Wick型随机广义Burgers'方程的非Wick型解.     

EXISTENCE AND UNIQUENESS OF SOLUTIONS TO STOCHASTIC FOREST EVOLUTION SYSTEM UNDER NON-LIPSCHITZ CONDITION

In this paper,we obtain some results on the existence and uniqueness of solutions to stochastic forest evolution system under non-Lipschitz condition, with Lipschitz condition being considered as a special case.We develop our theory by investigating convergence of sequence of stochastic process defined by successive approximations in the general functional setting.The major tools we used are Bihari inequality and Davis inequality.     

Backward stochastic differential equations with two barriers and generalized reflection

We prove the existence and uniqueness of solutions of backward stochastic differential equations (BSDEs) with generalized reflection at time dependent càdlàg barriers. The reflection model we consider includes, as special cases, the standard reflection as well as the mirror reflection studied earlier in the theory of forward stochastic differential equations. We also show that the solution of BSDEs with generalized reflection corresponds to the value of an optimal stopping problem.     

Investigation of a problem of an elastic half space subjected to stochastic temperature distribution at the boundary

The present work investigates the responses of stochastic type temperature distribution applied at the boundary of an elastic medium in the context of thermoelasticity without energy dissipation. We consider an one dimensional problem of half space and assume that the bounding surface of the half space is traction free and is subjected to two types of time dependent temperature distributions which are of stochastic types. In order to compare the results predicted by stochastic temperature distributions with the results of deterministic type temperature distribution, the stochastic type temperature distributions applied at the boundary are taken in such a way that they reduce to the cases of deterministic types as special cases. Integral transform technique along with stochastic calculus is used to solve the problem. The approximated solutions for physical fields like, stress, temperature, displacement etc. are derived for very small values of time where stochastic type boundary conditions are taken to be of white noise type. The problem is further illustrated with graphical representation of numerical solutions of the problem for a particular case. A detailed comparison of the results of stochastic temperature, displacement and stress distributions inside the half space with the corresponding results of deterministic distributions is presented and special features of the effects of stochastic type boundary conditions are highlighted.     

Stationary measures for stochastic differential equations with jumps

In the paper, stationary measures of stochastic differential equations with jumps are considered. Under some general conditions, existence of stationary measures is proved through Markov measures and Lyapunov functions. Moreover, for two special cases, stationary measures are given by solutions of Fokker–Planck equations and long time limits for the distributions of system states.     

Periodic-like solutions of variable coefficient and Wick-type stochastic NLS equations

Variable coefficient and Wick-type stochastic nonlinear Schrödinger (NLS) equations are investigated. By using white noise analysis, Hermite transform and extended F-expansion method, we obtain a number of Wick versions of periodic-like wave solutions and periodic wave solutions expressed by various Jacobi elliptic functions for Wick-type stochastic and variable coefficient NLS equations, respectively. In the limit cases, the soliton-like wave solutions are showed as well. Since Wick versions of functions are usually difficult to evaluate, we get some nonWick versions of the solutions for Wick-type stochastic NLS equations in special cases.     

Density analysis of non-Markovian BSDEs and applications to biology and finance

In this paper, we provide conditions which ensure that stochastic Lipschitz BSDEs admit Malliavin differentiable solutions. We investigate the problem of existence of densities for the first components of solutions to general path-dependent stochastic Lipschitz BSDEs and obtain results for the second components in particular cases. We apply these results to both the study of a gene expression model in biology and to the classical pricing problems in mathematical finance.