1. At this "initial" time, the best bid price is $13.99 and the best ask is $14.00. During this 20-minute window, the bid price changes are -1, +1, -1, +1 (in the unit of one cent/tick) at time instants;this section we present summary statistics for BAC traded on NYSE Arca on,2010
2. The quantities are computed from dividing outstanding limit order volume (shares) on each price level by unit order size (363 shares);Number of BAC limit orders on Arca at 12:45pm,2010
3. but we allow for the dependence of order flow intensities on the buy/sell side. For illustration, we present results for price levels 10 ticks above the best bid and 10 ticks below the best ask where most order activities concentrate. There are seven columns in each of the Tables 2-5. The References Abergel;; F Al;We finally summarize in Tables 2-5 the order flow rates for each of the four time windows discussed in Section 4.1. The estimation procedure follows Cont et,2010