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arXiv 2007.14328q-fin.PRmath.PR
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分数阶Heston跳跃扩散模型的一个分解公式

A decomposition formula for fractional Heston jump diffusion models

Marc Lagunas-Merino, Salvador Ortiz-Latorre

摘要:

给出了随机波动率模型下欧式期权期权定价公式。特别地,波动率过程是使用扩散过程的分数积分来定义的,并且股票价格和波动率过程都具有跳跃,以捕获被称为杠杆效应的市场效应。我们展示了如何计算波动率过程的鞅表示。最后,利用伊藤微积分的过程具有不连续的轨迹,我们开发了一个一阶近似公式的期权价格。与传统定价方法相比,使用这种近似公式有两个主要优点。首先,提高计算效率,其次,有一个更深入的了解期权价格的变化方面的模型参数的变化。

英文摘要:

We present an option pricing formula for European options in a stochastic volatility model. In particular, the volatility process is defined using a fractional integral of a diffusion process and both the stock price and the volatility processes have jumps in order to capture the market effect known as leverage effect. We show how to compute a martingale representation for the volatility process. Finally, using Itô calculus for processes with discontinuous trajectories, we develop a first order approximation formula for option prices. There are two main advantages in the usage of such approximating formulas to traditional pricing methods. First, to improve computational effciency, and second, to have a deeper understanding of the option price changes in terms of changes in the model parameters.

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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