Patent ID: 8832306
Filing Date: 2014-09-09
Classification: G06F,G06Q

Abstract:
1. A method comprising the steps of: transmitting from a computer-implemented electronic exchange system to electronic client devices a current list of items sorted in order by the computer-implemented electronic exchange system prior to transmission and in accordance with a value of a market parameter including one of a market-by-order parameter, a market-by-level parameter, or a market-by-price parameter, where the list of sorted items represents a current orderbook of the computer-implemented electronic exchange system and includes pending sorted buy or sell orders for a particular financial instrument, and where a first electronic client device subscribes to the first X sorted items of the current list, X being a positive integer and in a range of 1-20, and a second electronic client device subscribes to the first Y number of sorted items of the current list, where Y>X; detecting, by a computer associated with the computer-implemented electronic exchange system, when an item is removed from the first X sorted items of the current list to produce a new list of first X sorted items based on an update message received at the computer-implemented electronic exchange system that indicates a change in relative position from the top of the current list of at least one of the pending sorted buy or sell orders for the particular financial instrument; and in response to the detecting step, transmitting a broadcast message to both the first and second electronic client devices that includes the item removed from the first X sorted items such that the first and second electronic client devices are informed of the removed item without having to receive the entire new list so that the first and second electronic client devices can manipulate their corresponding sorted items of the current list using the item removed from the X sorted items.