On July 26th, the SEC voted unanimously to adopt a new rule establishing large trader reporting requirements to enhance the agency's ability to identify large market participants, collect information on their trading, and analyze their trading activity. The new rule requires large traders to identify themselves to the SEC, which will then assign each trader a unique identification number. Large traders will provide this number to their broker-dealers, who will be required to maintain transaction records for each large trader and report that information to the SEC upon request. The new requirement is part of the agency's response to the May 6, 2010 "flash crash." The new rule will be effective 60 days after publication in the Federal Register, which is expected during the week of August 1. SEC Press Release.