Banach Space Valued Martingales with Respect to Complex Measure and Their Inequalities

Let d μ=ψ d ν be a complex valued measure where ν is a non negative measure and ψ is a complex valued function which satisfies b + p or b + ∞∩a 1 condition. We prove some basic martingale inequalities such as B G inequalities, weak ( p,p) and strong (p,p) type inequalities for Banach space valued martingale with respect to complex measure μ .

CARLESON MEASURES AND THE GENERALIZED CAMPANATO SPACES OF VECTOR-VALUED MARTINGALES

In this paper, the so-called（p,Ф）-Carleson measure is introduced and the rela-tionship between vector-valued martingales in the general Campanato spaces Lp,Ф（X） and the （p, Ф）-Carleson measures is investigated. Specifically, it is proved that for q ∈ [2, ∞）, the measure d# ：-=││ dfk││^qdP dm is a （q, Ф）-Carleson measure on Ω × N for every f ∈ Lq,Ф（X） if and only if X has an equivalent norm which is q-uniformly convex; while for p C （1, 2], the measure dμ ：=││dfk││^pP dm is a （p, Ф）-Carleson measure on Ω ×N implies that f ∈ Lp,Ф（X） if and only if X admits an equivalent norm which is p-uniformly smooth. This result extends an earlier result in the literature from BMO spaces to general Campanato spaces.

MARTINGALE REPRESENTATION AND LOGARITHMIC-SOBOLEV INEQUALITY FOR THE FRACTIONAL ORNSTEIN-UHLENBECK MEASURE

In this paper,we consider the measure determined by a fractional OrnsteinUhlenbeck process.For such a measure,we establish an explicit form of the martingale representation theorem and consequently obtain an explicit form of the Logarithmic-Sobolev inequality.To this end,we also present the integration by parts formula for such a measure,which is obtained via its pull back formula and the Bismut method.

The mean correcting martingale measures for exponential additive processes

The mean correcting martingale measure for the stochastic process defined as the exponential of an additive process is constructed. Necessary and sufficient conditions for the existence of mean correcting martingale are also obtained. The investigation of this paper will establish a unified way that is applicable both to the case of Ldvy processes and that of the sums of independent random variables. As an application, we present the necessary and sufficient conditions that the discounted stock price process is a martingale.

Martingales and Super-Martingales Relative to a Convex Set of Equivalent Measures

In the paper, the martingales and super-martingales relative to a convex set of equivalent measures are systematically studied. The notion of local regular super-martingale relative to a convex set of equivalent measures is introduced and the necessary and sufficient conditions of the local regularity of it in the discrete case are founded. The description of all local regular super-martingales relative to a convex set of equivalent measures is presented. The notion of the complete set of equivalent measures is introduced. We prove that every bounded in some sense super-martingale relative to the complete set of equivalent measures is local regular. A new definition of the fair price of contingent claim in an incomplete market is given and the formula for the fair price of Standard Option of European type is found. The proved Theorems are the generalization of the famous Doob decomposition for super-martingale onto the case of super-martingales relative to a convex set of equivalent measures.

CONDITIONAL EXPECTATIONS AND MARTINGALES IN NONCOMMUTATIVE Lp-SPACES ASSOCIATED WITH CENTER-VALUED TRACES

In this paper we prove the existence of conditional expectations in the noncom- mutative Lp（M, Ф）-spaces associated with center-valued traces. Moreover, their description is also provided. As an application of the obtained results, we establish the norm convergence of weighted averages of martingales in noncommutative Lp（M, Ф）-spaces.

Exponential martingale for compound Poisson process with latent variable and its applications

In this article, we construct an exponential martingale for the compound Poisson process with latent variable. With the help of this exponential martingale, we provide an asymptotic behavior of the coherent entropic risk measure for the compound Poisson process and a deviation inequality for the ruin probability of the partly shifted risk process.

The Construction of a Class of Measure-valued Processes of Stochastic Flows

In this article, we give a description of measure-valued processes with interactive stochastic flows. It is a unified construction for superprocesses with dependent spatial motion constructed by Dawson, LI, Wang and superprocesses of stochastic flows constructed by Ma and Xiang.

Application of Moore-Penrose Inverse in Deciding the Minimal Martingale Measure

The Moore-Penrose inverse is an important tool in algebra.This paper shows that the MoorePenrose inverse is also an effcient technique in determining the minimal martingale measure if a security price follows a semi-martingale which satisfies some structure condition.We extend a result of Dzhaparidze and Spreij concerning the Moore-Penrose inverse to the case that the Moore-Penrose inverse of any matrix-valued predictable process is still predictable.Furthermore,we obtain an explicit formula of the minimal martingale measure by employing the Moore-Penrose inverse.Specifically,the minimal martingale measure in a generalized Black-Scholes model is found.

Minimal Martingale Measures for Discrete-time Incomplete Financial Markets

In this note, we give a characterization of the minimal martingale measure for a general discrete-time incomplete financial market. Then we concretely work out the minimal martingale measure for a specific discrete-time market model in which the assets' returns in different times are independent.

离散时间正规鞅算子值函数的Bochner积分

设M是一个具有混沌表示性质的离散时间正规鞅,φ(M)■L2(M)■φ*(M)是基于M泛函的Gel’fand三元组.从φ(M)到φ*(M)的连续线性算子可称为M泛函上的广义算子,以φ表示此类算子的全体.本文的主要目的在于建立φ值函数关于φ值测度的积分运算.为此,本文首先讨论φ值测度的基本性质,在此基础上定义了φ值函数关于φ值测度在卷积意义下的Bochner积分,并建立了相应的控制收敛定理和卷积意义下的Fubini定理.

商品互换及商品互换期权的定价

在考虑商品的便利收益情况下 ,探讨了商品互换及其期权的定价 .对价格是随机的情形建立了单因素模型 ;对价格 ,便利收益是随机的情形 ,建立了两因素模型 ;对价格 ,便利收益和利率是随机的情形建立了三因素模型 ,对不同的情形得到了相应的商品互换及其期权的定价公式 。

基于随机利率下跳-扩散过程的复合期权的定价

复合期权是以期权作为标的资产的期权,在公司金融中应用非常广泛,能够得到复合期权的定价解析公式是十分有用的。首先建立随机利率条件下,含有多个跳跃项和多个扩散项的股票价格过程的随机微分方程,然后利用测度变换及鞅方法得到欧式期权及欧式复合期权的定价解析公式。从两方面推广了以前的一些结果:同时考虑了随机利率和跳扩散过程;假定跳扩散过程含有多个扩散源和跳跃源。

亚式期权定价中的鞅方法

在市场无套利的假设下 ,讨论了变系数 B-S模型下亚式期权定价 ,利用测度变换和鞅方法 ,简化了亚式期权价格的求解过程 ,并通过求解随机微分方程给出有关随机过程在某一时刻的分布 ,导出几何平均亚式期权定价的解析表达式 。

带跳扩散过程的外汇期权定价

研究了带跳扩散过程的外汇期权定价问题.在外汇汇率价格过程遵循Poisson跳跃扩散过程的条件下,应用随机分析、等价鞅测度及偏微分方法,得到欧式外汇期权的定价公式及外汇期权看涨和看跌的平价公式.

支付红利的跳-扩散过程的股票期权定价

目的研究股票支付红利。方法在市场无套利条件下建立随机微分方程,运用鞅论、随机分析的方法分析并求解方程。结果得到了支付红利的跳-扩散过程的欧式看涨期权的定价公式及欧式看涨看跌期权之间的平价公式。结论在实际中股票价格的跳过程不一定是Poisson跳,红利率也未必是常数,其价格服从跳-扩散过程的期权定价还有待于进一步研究更为复杂情形下的期权定价。

债券价格随机时重设型熊市认售权证的定价

考虑完全无套利市场环境下,当标的资产—股票指数支付连续红利,市场上无风险资产—零息票债券的价格过程满足一个由布朗运动驱动的随机微分方程时,对一种特殊的单点重置期权—重设型熊市认售权证,以鞅论和随机分析为工具,得到了该期权的定价公式.

等价鞅测度模型在外汇期权定价中的应用

在随机利率下,分别就单因子模型和双因子模型两种情况展开讨论,利用等价鞅测度模型给出欧式外汇期权定价的一般公式。

重置期权的一种创新及其定价

在完全市场环境下,对传统单点重置期权进行了创新,当债券价格B(t)为时间t的确定性函数时,以鞅论和随机分析为数学工具,得到了创新期权的定价公式.

随机波动率模型的等价鞅测度

研究了随机波动率模型的等价鞅测度.利用动态规划方法通过效用无差别定价构造了最小熵鞅测度,并给出了极小鞅测度和方差最优鞅测度,验证了这些鞅测度是不同的.