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arXiv 2409.07477q-fin.CPmath.PRq-fin.PR
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基于广义随机混合系统的美式期权定价

American option pricing using generalised stochastic hybrid systems

Evelyn Buckwar, Sascha Desmettre, Agnes Mallinger, Amira Meddah

AI总结:

本研究针对传统美式期权定价模型假设恒定漂移与波动率、难以贴合真实市场波动的问题,引入分段扩散马尔可夫过程构建定价方法,经与Longstaff-Schwartz算法对比验证,该方法在定价准确性和计算效率上均有提升。

摘要:

本文提出一种利用分段扩散马尔可夫过程(PDifMPs,一种整合连续动力学与离散跳跃过程的广义随机混合系统)为美式期权定价的新方法。标准模型通常依赖恒定漂移和波动率假设,这限制了其准确捕捉金融市场复杂且不稳定特性的能力。通过引入PDifMPs,我们的方法可解释市场的突然波动,提供了更符合实际的资产价格动力学模型。我们将该方法与Longstaff-Schwartz算法(包括原始版本及修改后纳入PDifMP资产价格轨迹的版本)进行基准对比。数值模拟表明,基于PDifMP的方法不仅能更准确地反映市场行为,还在计算效率方面具备实际优势。研究结果显示,PDifMPs通过更贴近真实金融市场中观测到的随机波动率和跳跃现象,可显著提升美式期权定价的预测准确性。

英文摘要:

This paper presents a novel approach to pricing American options using piecewise diffusion Markov processes (PDifMPs), a type of generalised stochastic hybrid system that integrates continuous dynamics with discrete jump processes. Standard models often rely on constant drift and volatility assumptions, which limits their ability to accurately capture the complex and erratic nature of financial markets. By incorporating PDifMPs, our method accounts for sudden market fluctuations, providing a more realistic model of asset price dynamics. We benchmark our approach with the Longstaff-Schwartz algorithm, both in its original form and modified to include PDifMP asset price trajectories. Numerical simulations demonstrate that our PDifMP-based method not only provides a more accurate reflection of market behaviour but also offers practical advantages in terms of computational efficiency. The results suggest that PDifMPs can significantly improve the predictive accuracy of American options pricing by more closely aligning with the stochastic volatility and jumps observed in real financial markets.

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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