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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 …
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volatility. Finally, we show that trading volume will be higher when textual sentiment is unusually high or low and when there …
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