Abstract
We consider structure preserving measure transforms for time-changed Lévy processes. Within this class of transforms preserving the time-changed Lévy structure, we derive equivalent martingale measures minimizing relative q-entropy. They combine the corresponding transform for the Lévy process with an Esscher transform on the time change. Structure preservation is found to be an inherent property of minimal q-entropy martingale measures under continuous time changes, whereas it imposes an additional restriction for discontinuous time changes.
Similar content being viewed by others
References
Applebaum, D.: Lévy Processes and Stochastic Calculus. Cambridge University Press, Cambridge (2004)
Barndorff-Nielsen, O.E., Shephard, N.: Modelling by Lévy processes for financial econometrics. In: Barndorff-Nielsen, O.E., Mikosch, T., Resnick, S. (eds.) Lévy Processes—Theory and Applications, pp. 283–318. Birkhäuser, Boston (2001)
Barndorff-Nielsen, O.E., Shephard, N.: Normal modified stable processes. Theory Probab. Math. Stat. 65, 1–20 (2002)
Carr, P., Geman, H., Madan, D.B., Yor, M.: Stochastic volatility for Lévy processes. Math. Finance 13, 345–382 (2003)
Chan, T.: Pricing contingent claims on stocks driven by Lévy processes. Ann. Appl. Probab. 9, 504–528 (1999)
Cont, R., Tankov, P.: Financial Modelling with Jump Processes. Chapman & Hall/CRC, Boca Raton (2004)
Esche, F., Schweizer, M.: Minimal entropy preserves the Lévy property: how and why. Stochastic Process. Appl. 115, 299–327 (2005)
Föllmer, H., Schweizer, M.: Hedging of contingent claims under incomplete information. In: Davis, M.H.A., Elliott, R.J. (eds.) Applied Stochastic Analysis, pp. 389–414. Gordon and Breach, New York (1991)
Fujiwara, T., Miyahara, Y.: The minimal entropy martingale measures for geometric Lévy processes. Finance Stoch. 7, 509–531 (2003)
Hubalek, F., Sgarra, C.: Esscher transforms and the minimal entropy martingale measure for exponential Lévy models. Quant. Finance 6, 125–145 (2006)
Jacod, J., Shiryaev, A.: Limit Theorems for Stochastic Processes, 2nd edn. Springer, Berlin (2003)
Jeanblanc, M., Klöppel, S., Miyahara, Y.: Minimal f q martingale measures for exponential Lévy processes. Ann. Appl. Probab. 17, 1615–1638 (2007)
Kassberger, S., Liebmann, T.: q-optimal martingale measures for exponential Lévy processes. Working paper available at SSRN. http://ssrn.com/abstract=1098098 (2007)
Luciano, E., Semeraro, P.: Multivariate time changes for Lévy asset models: characterization and calibration. J. Comput. Appl. Math. 233, 1937–1953 (2010)
Madan, D.B., Seneta, E.: The variance gamma model for share market returns. J. Bus. 63, 511–524 (1990)
Nicolato, E., Venardos, E.: Option pricing in stochastic volatility models of the Ornstein–Uhlenbeck type. Math. Finance 13, 445–466 (2003)
Sato, K.-I.: Lévy Processes and Infinitely Divisible Distributions. Cambridge University Press, Cambridge (1999)
Schoutens, W.: Lévy Processes in Finance. Wiley, Chichester (2003)
Schweizer, M.: A minimality property of the minimal martingale measure. Stat. Probab. Lett. 42, 27–31 (1999)
Schweizer, M.: A guided tour through quadratic hedging approaches. In: Jouini, S., Cvitanić, J., Musiela, M. (eds.) Option Pricing, Interest Rates and Risk Management, pp. 538–574. Cambridge University Press, Cambridge (2001)
Selivanov, A.V.: On the martingale measures in exponential Lévy models. Theory Probab. Appl. 42, 261–274 (2005)
Semeraro, P.: A multivariate variance gamma model for financial applications. Int. J. Theor. Appl. Finance 11, 1–18 (2008)
Winkel, M.: The recovery problem for time-changed Lévy processes. Maphysto Research Report 2001-37. http://www.maphysto.dk/publications/MPS-RR/2001/37.pdf (2001)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kassberger, S., Liebmann, T. Minimal q-entropy martingale measures for exponential time-changed Lévy processes. Finance Stoch 15, 117–140 (2011). https://doi.org/10.1007/s00780-010-0133-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00780-010-0133-9