This paper investigates high-frequency (HF) trading in the U.S. Treasury market around macroeconomic news announcements. After identifying HF market and limit orders based on the speed of their placement alteration and cancellation deemed beyond manual ability, we use the introduction of the...

This paper delineates the simultaneous impact of non-anticipated information on first and second moments of the intraday price process by including appropriate variables accounting for the news flow into both the mean and the variance function. This allows us to differentiate between the...