Inference For Stochastic Volatility Model Using Time Change Transformations
Source: Munich Personal Repec Archive
The authors address the problem of parameter estimation for diffusion driven stochastic volatility models through Markov Chain Monte Carlo (MCMC). To avoid degeneracy issues they introduce an innovative reparametrisation defined through transformations that operate on the time scale of the diffusion. A novel MCMC scheme which overcomes the inherent difficulties of time change transformations is also presented. The algorithm is fast to implement and applies to models with stochastic volatility. The methodology is tested through simulation based experiments and illustrated on data consisting of US treasury bill rates.