Leung, Tim; Zhao, Theodore - In: Risks : open access journal 11 (2023) 7, pp. 1-20
We present a multiscale analysis of the volatility of intraday prices from high-frequency data. Our multiscale … Brownian motion model is shown to possess a variety of volatility behaviors suitable for intraday price processes. Algorithms … and ETFs, we estimate the parameters in the noisy fractional Brownian motion and illustrate how the volatility varies over …