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arXiv 1202.0619math.PR
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关于随机变量关于PII过程的整表示的期望和导数算子

On some expectation and derivative operators related to integral representations of random variables with respect to a PII process

Stéphane Goutte, Nadia Oudjane, Francesco Russo

摘要:

给定一个独立增量过程$X$(不一定是鞅)和一大类平方可积〔的〕r. v. $H=f(X_T)$,$f$是有限测度$μ$的傅里叶变换,我们提供明确的Kunita-Watanabe和Föllmer-Schweizer分解。该表示是通过两个显着的地图表示:期望和导数运营商的特点$X$。我们还提供了一个显式的表达时,对冲索赔$H$与底层过程$X$的方差最优误差。这些问题是由金融数学中著名的全局和局部二次风险最小化问题的求解引起的。

英文摘要:

Given a process with independent increments $X$ (not necessarily a martingale) and a large class of square integrable r.v. $H=f(X_T)$, $f$ being the Fourier transform of a finite measure $μ$, we provide explicit Kunita-Watanabe and Föllmer-Schweizer decompositions. The representation is expressed by means of two significant maps: the expectation and derivative operators related to the characteristics of $X$. We also provide an explicit expression for the variance optimal error when hedging the claim $H$ with underlying process $X$. Those questions are motivated by finding the solution of the celebrated problem of global and local quadratic risk minimization in mathematical finance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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