题 目：Fractional stochastic processes: a new application to volatility estimation..
报告人：Dr. Isabel Casas（Assistant Professor of Statistics）
Dept of Statistics,Universidad Carlos III De Madrid
时 间：2007年6月21日10：00-11：30am
地 点：光华202
Abstract:
It is commonly accepted that some financial data may exhibit long-range dependence, while other financial data exhibit intermediate-range or short--range dependence. These behaviours may be fitted to a continuous-time fractional stochastic model. The estimation procedure proposed in this seminar is based on a continuous-time version of the Gauss-Whittle objective function to find the parameter estimates that minimise the discrepancy between the spectral density and the data periodogram. As a special case, the proposed estimation procedure is applied to a class of fractional stochastic volatility models. The estimation of the volatility process is one of the most difficult problems in econometrics. The authors propose a technique to estimate the drift, standard deviation and memory properties of the volatility process from a transformation of the returns. As an aplication, the volatility of the Dow Jones, S&P 500, CAC 40, DAX 30, FTSE 100 and NIKKEI 225 is estimated.
