4.1. Volatilities in terms of extreme values Overlapping Case: Let St denote the stock price at time t. Duran (see [9]) defines the volatility of stock price on Day i, with a memory of the most recent φ + 1, for example 25, trading days, by
4.1. Volatilities in terms of extreme values Overlapping Case: Let St denote the stock price at time t. Duran (see [9]) defines the volatility of stock price on Day i, with a memory of the most recent φ + 1, for example 25, trading days, by