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1.
修正的期权定价模型及定价公式   总被引:2,自引:0,他引:2  
通过一系列函数变换,求出了修正的Black—Scholes欧式定价模型方程的解,并对股票与国债的投资组合进行了分析。  相似文献
2.
Stock exchange dynamics of fractional order are usually modeled as a non-random exponential growth process driven by a fractional Brownian motion. Here we propose to use rather a non-random fractional growth driven by a (standard) Brownian motion. The key is the Taylor’s series of fractional order where Eα(.) denotes the Mittag-Leffler function, and is the so-called modified Riemann-Liouville fractional derivative which we introduced recently to remove the effects of the non-zero initial value of the function under consideration. Various models of fractional dynamics for stock exchange are proposed, and their solutions are obtained. Mainly, the Itô’s lemma of fractional order is illustrated in the special case of a fractional growth with white noise. Prospects for the Merton’s optimal portfolio are outlined, the path probability density of fractional stock exchange dynamics is obtained, and two fractional Black-Scholes equations are derived. This approach avoids using fractional Brownian motion and thus is of some help to circumvent the mathematical difficulties so involved.  相似文献
3.
期权定价的新型三叉树方法   总被引:1,自引:0,他引:1  
讨论了普通二叉树模型定价公式的缺陷,在新型二叉树定价模型的基础上利用原点矩和中心矩的关系得出新型三叉树定价模型公式,并且证明该三叉树模型下期权价格满足的方程是B-S方程在Δt上的一阶近似.  相似文献
4.
在B lack-Scho les公式中,波动率σ是一个非常重要的参数.并且在诸如股票、利率、股指期货等标的资产的交易市场中,人们往往希望知道标的资产未来价格的波动率,从而知道该资产的未来风险结构.但一般来说,由于事件还没有发生,人们对σ的未来走向很难预测.但可以运用B lack-Scho les的理论框架,从期权市场获取的信息去重构标的资产价格的波动率.论文使用的是基于T ikhonov正则化的数值微分方法,利用Dup ire公式去重构标的资产的未来预期波动率.相对于其他方法,该算法更加快速有效,并且能识别标的资产的预期风险突变.  相似文献
5.
对Lawrence C.Evans提出的Black-scholes偏微分方程的一种基于"自我融资(self-financing)"的概念的推导方法进行改进和补充.我们采用离散时间模型对"自我融资"进行系统的分析,并给出直观的金融阐释和一个新的数学推导方法.我们的推导方法与Lawrence C.Evans的论述相辅相成,二者结合在一起,为"自我融资"的概念提供了一个完整的数学刻划.  相似文献
6.
This paper concerns the valuation of average options of European type where an investor has the right to buy the average of an asset price process over some time interval, as the terminal price, at a prespecified exercise price. A discrete model is first constructed and a recurrence formula is derived for the exact price of the discrete average call option. For the continuous average call option price, we derive some approximations and theoretical upper and lower bounds. These approximations are shown to be very accurate for at-the-money and in-the-money cases compared to the simulation results. The theoretical bounds can be used to provide useful information in pricing average options.  相似文献
7.
1 引言无界区域问题的有理谱方法已经得到广泛地应用.它有很多优点,特别是我们不需要添加任何人工边界以及作任何变量变换就可以直接逼近微分方程.此外,Jacobi 有理谱方法可以用来数值求解变系数的微分方程,如金融数学中的基本方程-Black-  相似文献
8.
In this paper we present a new numerical method to price an interest rate derivative. The financial product consists of a particular ratchet cap contract which contains a set of ratchet caplets. For this purpose, we first pose the PDE pricing model for each ratchet caplet by means of Feynman-Kac theorem. The underlying interest rates are the forward LIBOR rates, the dynamics of which are assumed to follow the recently introduced BGM (LMM) market model. For the set of PDEs associated to the ratchet caplets pricing problems, we propose a second order Crank-Nicolson characteristics time discretization scheme combined with a finite element discretization in the interest rate variables. In order to illustrate the performance of the numerical methods, we present an academic test and a real example of a particular ratchet cap pricing. In the second case, a comparison between the results obtained by Monte Carlo simulation and the proposed method is presented.  相似文献
9.
用有限差分方法研究欧氏看涨期权定价问题.首先,将Black-Scholes方程通过等价代换化成一个标准的抛物型偏微分方程.其次,在求解区域构造时间精度为O(△τ^3)、空间精度为O(h^6)的差分格式,并通过Fourier分析方法证明该差分格式是无条件稳定的;边界区域选用精度较高、稳定性好的Crank-Nicolson格式,建立迭代方程.然后,用GMRES(generalized minimal residual)方法求解该方法.最后,给出一个欧氏看涨期权的数值算例,并与解析解进行比较,验证差分格式的有效性.  相似文献
10.
In this paper we shall derive the solutions of a class of partial differential equations and its application to the Black-Scholes equation.  相似文献
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