Abstract: A method and system are provided for comparing data from several different sources in real time to determine inconsistencies between such data. The present invention further and alerts a user to such inconsistencies. The preferred embodiment of the present invention uses such a method and system for identifying exceptions in data from financial markets, brokers and customers to alert a financial institution immediately to inconsistent data with respect to orders, executions and allocations of trade information. In this way, this method and system saves valuable time in identifying such exceptions, thereby allowing a financial institution to correct such exceptions virtually immediately. The system and method described herein also assists a financial institution in complying with the T+3 trading cycle and makes a move to the T+1 trading cycle feasible.