17 CFR § 30.9 - Fraudulent transactions prohibited.
It shall be unlawful for any person, by use of the mails or by any means or instrumentality of interstate commerce, directly or indirectly, in or in connection with any account, agreement or transaction involving any foreign futures contract or foreign options transaction:
(a) To cheat or defraud or attempt to cheat or defraud any other person;
(c) To deceive or attempt to deceive any other person by any means whatsoever in regard to any such account, agreement or transaction or the disposition or execution of any such account, agreement or transaction or in regard to any act of agency performed with respect to such account, agreement or transaction; or
(d) To bucket any order, or to fill any order by offset against the order or orders of any other person or without the prior consent of any person to become the buyer in respect to any selling order of such person, or become the seller in respect to any buying order of such person.