"When (a futures commission merchant's) financial risk controls are so lacking that they do virtually nothing to prevent an unchecked customer from taking grossly excessive trading risks as happened here, a harmful domino effect of financially dangerous consequences can follow, affecting not only the FCM but also potentially other customers and the market at large, " said David Meister, the CFTC's enforcement director.

WSJ: FCStone fined $1.5 million in CFTC settlement