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arXiv 1503.02778math.PR
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关于多元布朗运动过程边界穿越概率的逼近率

On approximation rates for boundary crossing probabilities for the multivariate Brownian motion process

S. McKinlay, K. Borovkov

摘要:

受金融数学中的一个近似问题的启发,我们分析了多元布朗运动过程在边界发生微小变化时的边界穿越概率的稳定性。在对边界性质的广泛假设下,包括时间截面上的利普希茨条件(在Hausdorff型度量中),我们得到了Borovkov和Novikov(2005)关于单变量情况下“闭合边界”的边界命中概率之差的上界的类似物。我们还得到了第一边界穿越时间密度的上界。

英文摘要:

Motivated by an approximation problem from mathematical finance, we analyse the stability of the boundary crossing probability for the multivariate Brownian motion process, with respect to small changes of the boundary. Under broad assumptions on the nature of the boundary, including the Lipschitz condition (in a Hausdorff-type metric) on its time cross-sections, we obtain an analogue of the Borovkov and Novikov (2005) upper bound for the difference between boundary hitting probabilities for "close boundaries" in the univariate case. We also obtained upper bounds for the first boundary crossing time densities.

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