Abstract: A system and method is disclosed for surveillance of financial data, comprising initiating a financial data surveillance module executable on a processor of a financial data surveillance computer system. Source data is retrieved from one or more data sources of a remote data server on which the source data is stored, the source data including transactions for a specific date and identification of the entity and account that each transaction is associated with. A metrics summary packet is generated for a particular account and the specific date, the metrics summary packet including one or more transaction classifiables that satisfy a predefined set of metric definition rules. A subjects packet is generated for the particular account that identifies the entities associated with the particular account, and a subjects-metrics packet is generated for the particular account by combining subject classifiables and metric classifiables within the subjects packet and metric summary packet.