宏观经济条件下的一个资产定价模型

资产定价和公司金融是金融学中的两个核心问题.首先将宏观经济因素的影响纳入资产定价的框架下,构建了一个资产定价模型;然后利用Bellman原理和Ito公式得到了微分方程,最后给出了债券价值、股权价值和公司价值的解析表达式.     

资产波动率为随机的信用等级迁移风险评估模型

以公司债券为手段,评估具有随机波动率的信用等级变换的风险.根据公司资产的多少将公司划分为高低两种信用等级,并假设公司资产的变化满足Heston随机波动率模型,且波动率在高低等级下围绕不同的均值波动回归.通过计算这样的资产波动下公司债券的价值,来评估具随机波动率的信用等级变换的风险.利用一张特殊的零息票来对冲由波动率的随...     

基于双指数跳扩散过程的公司债券定价

研究基于公司资产价值服从双指敷跳扩散过程,公司负债服从连续扩散过程的公司债券定价问题.首先用计价单位方法给出简单情况下以零息票债券为基础的公司债券定价问题的解析解;其次给出一般情况下公司债券定价问题的违约概率,并讨论信用价差的期限结构.实证分析表明该模型能较好地拟合实际情况.     

美式债券期权定价熵模型

基于熵定价理论,结合美式期权解析近似求解的G eske-Johnson方法,构建了美式债券期权定价熵模型,给出了标的资产为零息票债券和息票债券的美式期权估值的解析近似计算公式,并展示了具体的算法步骤.     

分数布朗运动下带违约风险的可转换债券定价模型

在股票价格、公司资产价值均服从分数次布朗运动且相关的条件下,利用风险对冲方法导出带违约风险的可转换债券定价模型;然后,通过解相关的偏微分方程得到其显式定价公式.     

次分数布朗运动下可分离交易可转债的定价及其风险参数

科学合理的定价是可分离交易可转债交易的基础.考虑到金融资产价格序列的长记忆性,应用次分数布朗运动的Ito公式和无风险套利原理,建立标的资产支付连续红利且资产价格遵循几何次分数布朗运动的可分离交易可转债定价模型.并利用Mellin变换求解得到定价模型的解析解.最后,分析几个风险参数对可分离交易可转债价值的影响,并通过数值模拟直观地呈现了可分离交易可转债价值随着相关参数变化的趋势.结果表明:股票价格、执行价格、债券的剩余期限、无风险利率、股票价格的波动率及股票价格的赫斯特指数都是可分离交易可转债定价时不可忽略的因素.     

带有违约风险的可转换债券的简约型定价

本文考虑简约模型下带有违约风险的可转换债券的定价问题.假定市场中可转换债券的违约强度满足Vasicek模型,利用鞅方法获得了该模型下可转换债券的定价公式.此外,我们通过数值分析显示了模型参数变化对可转换债券价值影响的敏感性程度,结果也表明违约风险将降低可转换债券的价值.     

约化模型中含有交易对手信用风险的可转换债券的定价

本文在约化模型中研究了含有交易对手信用风险的可转换债券的定价问题.我们假设市场中可转换债券的违约强度过程和无风险利率过程均满足Vasicek模型,通过引入测度变换的方法导出了该模型中可转换债券的定价表达式.此外,我们通过数值分析展示了模型的参数变化对可转换债券价值的影响.     

跨期多事件触发巨灾债券定价模拟分析

巨灾导致的不同类损失分布具有异质性,而单一事件触发的巨灾债券不能统筹考虑多个损失维度.本文在考虑两个不同损失维度的基础上,构建了由两个损失指标共同触发的巨灾债券定价模型,进行了产品初步设计和价格估算,并通过蒙特卡罗模拟实现了多期限定价.本文以台风损失为例,对直接经济损失、受灾面积两个损失维度进行分布拟合,借助ClaytonCopula得到联合概率分布函数对巨灾债券定价,并进行了价格动态分析.     

关于巨灾债券定价模型的研究

巨灾债券的定价是巨灾债券的核心技术及难题。本文从两个方面来分析巨灾债券的定价:首先从规范学的角度来分析巨灾债券的定价,以金融衍生品的无套利定价方法确定巨灾债券的价格,即"巨灾债券价格应该为多少";其次,从实证学角度分析巨灾债券的定价,以利用精算学中的Wang变换和双因素变换模型为定价方法,分析巨灾债券的价格,即"巨灾债券价格是多少",通过对实际巨灾债券的价格实证分析得到:双因素模型能更好的拟合实际价差,对单一事件单一期限的巨灾债券,运用双因素模型得到较高的拟合优度。     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.     

Generalization of the interaction between Haar approximation and polynomial operators to higher order methods

In applications it is useful to compute the local average empirical statistics on u. A very simple relation exists when of a function f（u） of an input u from the local averages are given by a Haar approximation. The question is to know if it holds for higher order approximation methods. To do so, it is necessary to use approximate product operators defined over linear approximation spaces. These products are characterized by a Strang and Fix like condition. An explicit construction of these product operators is exhibited for piecewise polynomial functions, using Hermite interpolation. The averaging relation which holds for the Haar approximation is then recovered when the product is defined by a two point Hermite interpolation.