of linear autocorrelation, volatility clustering), trading volumes (volume clustering, correlation between volume and … volatility), and timing of trades (number of price changes, autocorrelation of durations between subsequent trades, heavy tail in …

, which reveals an interesting connection to the theory of Brownian excursion areas. A major application is the estimation of … the integrated squared volatility of an effcient price process Xt from intra-day order book quotes. We derive n -1/3 as … optimal convergence rate of integrated squared volatility estimation in a high-frequency framework with n observations (in …

long memory completely disappears. -- Volatility clustering ; Autocorrelations of returns ; Fundamentalists and …