Financial volatility estimation using functional gradient descent algorithm

摘要

In this paper, we propose a semiparametric method for modeling the volatility in financial time series. The aim is to improve the forecasting capabilities of the most popular parametric volatility models and we also compare our approach to two recent semiparametric models in the literature. Our method is based on the bivariate Bernstein basis polynomials and the functional gradient descent (FGD) algorithm. We evaluate our method through simulated and real datasets. The results demonstrate its good predictive potential for financial volatility.