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arXiv 1001.5202q-fin.PR
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不确定性对未定权益定价的影响

The impact of uncertainties on the pricing of contingent claims

Simone Scotti

摘要:

利用Dirichlet Forms方法研究了参数不确定性对随机扩散模型的影响,特别是对未定权益定价的影响。我们应用最近的技术,开发的Bouleau,对冲程序,以计算的敏感性,相对于参数扰动的轨迹。我们证明了这个模型可以重现一个买卖价差。我们还证明了,如果随机微分方程允许一个封闭形式的表示,也灵敏度有封闭形式的表示。我们展示了对数正态扩散的情况下,我们表明,这个框架预见了一个微笑的隐含波动率表面与历史数据一致。

英文摘要:

We study the effect of parameters uncertainties on a stochastic diffusion model, in particular the impact on the pricing of contingent claims, thanks to Dirichlet Forms methods. We apply recent techniques, developed by Bouleau, to hedging procedures in order to compute the sensitivities of SDE trajectories with respect to parameter perturbations. We show that this model can reproduce a bid-ask spread. We also prove that, if the stochastic differential equation admits a closed form representation, also the sensitivities have closed form representations. We exhibit the case of log-normal diffusion and we show that this framework foresees a smiled implied volatility surface coherent with historical data.

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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