Home Sensitivity analysis of the optimal exercise boundary of the American put option
Article
Licensed
Unlicensed Requires Authentication

Sensitivity analysis of the optimal exercise boundary of the American put option

  • Nasir Rehman EMAIL logo , Sultan Hussain and Wasim Ul-Haq
Published/Copyright: April 13, 2016
Become an author with De Gruyter Brill

Abstract

We consider the American put problem in a general one-dimensional diffusion model. The risk-free interest rate is constant, and volatility is assumed to be a function of time and stock price. We use the well-known parabolic obstacle problem and establish the continuity estimate of the optional exercise boundaries of the American put option with respect to the local volatilities, which may be considered as a generalization of the Achdou results [1].

MSC 2010: 60G40; 60G48; 91B28

Funding statement: The authors wish to gratefully acknowledge the financial support from their corresponding universities.

Acknowledgements

The authors wish to gratefully acknowledge the constructive comments of the anonymous referees which helped us a lot in improving the paper.

References

[1] Achdou Y., An inverse problem for a parabolic variational inequality arising in volatility calibration with American options, SIAM J. Control Optim. 43 (2005), no. 5, 1583–1615. 10.1137/S0363012903424423Search in Google Scholar

[2] Anderson S., A simple approach to the pricing of Bermudan swaptions in the multifactor LIBOR market model, J. Comput. Finance 3 (2000), 5–32. 10.21314/JCF.1999.041Search in Google Scholar

[3] Ekström E., Properties of American option prices, Stochastic Process. Appl. 114 (2004), no. 2, 265–278. 10.1016/j.spa.2004.05.002Search in Google Scholar

[4] El-Karoui N., Jeanblance-Picqué M. and Shreve S. E., Robustness of the Black and Scholes formula, Math. Finance 8 (1998), no. 2, 93–126. 10.1111/1467-9965.00047Search in Google Scholar

[5] Hobson D. G., Volatility misspecification, option pricing and superreplication via coupling, Ann. Appl. Probab. 8 (1998), no. 1, 193–205. 10.1214/aoap/1027961040Search in Google Scholar

[6] Jacka S., Optimal stopping and the American put, Math. Finance 1 (1991), no. 2, 1–14. 10.1111/j.1467-9965.1991.tb00007.xSearch in Google Scholar

[7] Karatzas I. and Shreve S. E., Methods of Mathematical Finance, Appl. Math. 39, Springer, Berlin, 1998. 10.1007/b98840Search in Google Scholar

[8] Kim I. J., The analytic valuation of the American options, Rev. Fin. Stud. 3 (1990), no. 4, 547–572. 10.1093/rfs/3.4.547Search in Google Scholar

[9] Lamberton D. and Villeneuve S., Critical price near maturity for an American option on a dividend-paying stock, Ann. Appl. Probab. 13 (2003), no. 2, 800–815. 10.1214/aoap/1050689604Search in Google Scholar

[10] Pham H., Optimal stopping, free boundary, and American option in a jump-diffusion model, Appl. Math. Optim. 35 (1997), no. 2, 145–164. 10.1007/s002459900042Search in Google Scholar

[11] Rehman N. and Shashiashvili M., The American foreign exchange option in time-dependent one-dimensional diffusion model for exchange rate, Appl. Math. Optim. 59 (2009), no. 3, 329–363. 10.1007/s00245-008-9056-7Search in Google Scholar

[12] Shreve S. E., Stochastic Calculus for Finance. II: Continuous-Time Models, Springer Finance, Springer, New York, 2004. 10.1007/978-1-4757-4296-1Search in Google Scholar

[13] Villeneuve S., Exercise regions of American options on several assets, Finance Stoch. 3 (1999), no. 3, 295–322. 10.1007/s007800050064Search in Google Scholar

[14] Wilmott P., Dewynne J. and Howison S., Option Pricing: Mathematical Models and Computation, Oxford Financial Press, Oxford, 1993. Search in Google Scholar

Received: 2014-7-12
Revised: 2015-2-14
Accepted: 2015-9-17
Published Online: 2016-4-13
Published in Print: 2016-9-1

© 2016 by De Gruyter

Downloaded on 22.9.2025 from https://www.degruyterbrill.com/document/doi/10.1515/gmj-2016-0017/html
Scroll to top button