British man held over £500bn Wall Street 'flash crash'

The U.S. Commodity Futures Trading Commission has  announced the unsealing of a civil enforcement action in the U.S. District Court for the Northern District of Illinois against Nav Sarao Futures Limited PLC (Sarao Futures) and Navinder Singh Sarao (Sarao) (collectively, Defendants).   The CFTC Complaint charges the Defendants with unlawfully…