Abstract
We introduce a class of stochastic volatility models whose parameters are modulated by a hidden nonlinear dynamical system. Our aim is to incorporate the impact of economic cycles, or business cycles, into the long-term behavior of volatility dynamics. We develop a discrete-time nonlinear filter for the estimation of the hidden volatility and the nonlinear dynamical system based on return observations. By exploiting the technique of a reference probability measure we derive filters for the hidden volatility and the nonlinear dynamical system.
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Elliott, R.J., Siu, T.K. & Fung, E.S. Filtering a nonlinear stochastic volatility model. Nonlinear Dyn 67, 1295–1313 (2012). https://doi.org/10.1007/s11071-011-0069-4
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DOI: https://doi.org/10.1007/s11071-011-0069-4