The Securities and Exchange Commission approved creation of a single comprehensive database to track all trading activity in US national market system equities and options in order to assist its and self-regulatory organizations’ surveillance of US market activity. Among data to be reported to and captured by the CAT will be the identity of the customer and lifecycle events related to each trade. Within two months, SROs are required to select a plan processor to build and operate the CAT. Within one year, SROs will be required to report all required information to the CAT while large broker-dealers will have this obligation beginning in two years and all remaining broker-dealers in three years.