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arXiv 1810.02071q-fin.CPq-fin.MFstat.ML
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用于百慕大期权定价的留一法最小二乘蒙特卡洛算法

Leave-one-out least squares Monte Carlo algorithm for pricing Bermudan options

Jeechul Woo, Chenru Liu, Jaehyuk Choi

AI总结:

针对传统最小二乘蒙特卡洛(LSM)算法定价百慕大期权时存在前视偏差、传统规避方法需额外模拟路径的问题,提出留一法LSM(LOOLSM)算法,无需加倍模拟即可消偏差,还证明偏差渐近与回归元-路径比成正比,该方法可扩展至其他基于回归的LSM改进算法。

摘要:

Longstaff和Schwartz(2001)提出的最小二乘蒙特卡洛(LSM)算法被广泛用于百慕大期权定价。LSM估计量存在不良的前视偏差,传统规避该偏差的技术需要额外的模拟路径。我们提出留一法LSM(LOOLSM)算法,无需加倍模拟量即可消除前视偏差。我们还证明前视偏差渐近与回归元-路径数之比成正比。我们通过多个期权示例验证了研究发现,这些示例中LSM算法会高估期权价值。LOOLSM方法可扩展至其他改进LSM方法的基于回归的算法。

英文摘要:

The least squares Monte Carlo (LSM) algorithm proposed by Longstaff and Schwartz (2001) is widely used for pricing Bermudan options. The LSM estimator contains undesirable look-ahead bias, and the conventional technique of avoiding it requires additional simulation paths. We present the leave-one-out LSM (LOOLSM) algorithm to eliminate look-ahead bias without doubling simulations. We also show that look-ahead bias is asymptotically proportional to the regressors-to-paths ratio. Our findings are demonstrated with several option examples in which the LSM algorithm overvalues the options. The LOOLSM method can be extended to other regression-based algorithms that improve the LSM method.

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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