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Markov chain approximation of one-dimensional sticky diffusions
Published online by Cambridge University Press: 01 July 2021
Abstract
We develop a continuous-time Markov chain (CTMC) approximation of one-dimensional diffusions with sticky boundary or interior points. Approximate solutions to the action of the Feynman–Kac operator associated with a sticky diffusion and first passage probabilities are obtained using matrix exponentials. We show how to compute matrix exponentials efficiently and prove that a carefully designed scheme achieves second-order convergence. We also propose a scheme based on CTMC approximation for the simulation of sticky diffusions, for which the Euler scheme may completely fail. The efficiency of our method and its advantages over alternative approaches are illustrated in the context of bond pricing in a sticky short-rate model for a low-interest environment and option pricing under a geometric Brownian motion price model with a sticky interior point.
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- © The Author(s), 2021. Published by Cambridge University Press on behalf of Applied Probability Trust
Footnotes
The supplementary material for this article can be found at http://doi.org/10.1017/apr.2020.65.
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