Vilder, Robin De; Visser, Marcel P. - HAL - 2007
High frequency data are often used to construct proxies for the daily volatility in discrete time volatility models … features of the approach are (1) a simple continuous time extension of discrete time volatility models and (2) an abstract … definition of volatility proxy. The theory is applied to eighteen years worth of S&P 500 index data. It is used to construct a …