Wash trading is placing matching buy and sell orders to create a false appearance of activity without taking on real market risk, and it is prohibited.
Last reviewed 26 October 2025 · Educational, not advice
Wash trading is entering into, or purporting to enter into, transactions that give the appearance of buying and selling without incurring market risk or changing the trader's actual position. Because the same party is effectively on both sides, no real ownership changes hands and no genuine risk is taken. It is also called round trip trading or a wash sale, and its purpose is to fake activity rather than to trade for a real reason.
The harm is that wash trades distort the signals other people rely on. Inflated volume can make a market look more liquid and more active than it is, which can draw other participants in or move a price on the back of trades that were never real. Because prediction market prices are meant to aggregate genuine opinion, fake volume corrupts the very thing that makes the price informative.
In United States derivatives markets wash trading is prohibited. Section 4c(a) of the Commodity Exchange Act makes it unlawful to enter into, or confirm the execution of, a transaction that is, or is commonly known to the trade as, a wash sale or fictitious sale. The Commodity Futures Trading Commission and the exchanges themselves enforce this, and knowingly accepting or accommodating such orders is also a violation. This is the position as of October 2025.
Wash trading is distinct from other abuses even though they often appear together. Spoofing is placing orders you intend to cancel to mislead others about supply or demand. Manipulation is a broader category of conduct that distorts a price. Wash trading specifically involves self matching trades that carry no real risk, which is why it is identified by the absence of a genuine change in ownership.
For an ordinary participant the practical point is awareness. Unusually high volume is not always a sign of a healthy market, and a venue with weak controls can carry distorted activity. Choosing regulated venues with surveillance and clear rules, and treating suspicious patterns with caution, is the sensible response. This page is general information, not legal advice.
A trader controls two accounts and has one buy 1,000 contracts from the other at the same price at the same moment. No net position changes and no real risk is taken, yet the tape shows 1,000 contracts of volume. That fictitious activity is a wash trade and is prohibited.
Illustrative only. Numbers are examples, not a quote or a prediction.
Fake volume can make a thin market look active, so do not read high volume alone as a sign of safety. Trading carries a real risk of loss whatever the tape shows. Stake only what you can afford to lose, never to chase a loss, and never on borrowed money. If it stops feeling like a free choice, step back. In the United States you can call or text the helpline on 1-800-GAMBLER or visit ncpgambling.org.
Placing matched buy and sell orders that create the appearance of trading without any real change in position or genuine market risk. It is meant to fake activity.
In United States derivatives markets it is prohibited under Section 4c(a) of the Commodity Exchange Act and enforced by the Commodity Futures Trading Commission and the exchanges. This is the position as of October 2025.
Spoofing uses orders the trader intends to cancel to mislead others. Wash trading uses self matching trades that actually execute but move no real risk.
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