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Crypto Law/Level VI · Market conduct/6.1 Manipulation/Lesson 2

Wash trading

Trading with yourself to fake volume: what US commodities and securities law say about it, how regulators and prosecutors have applied it to crypto, and how to spot it on-chain.

Education, not legal, tax or investment advice. Crypto law differs between countries and states and changes often. Check the current rules where you live with a qualified lawyer or tax adviser before you act.

The lean path

The cheapest, lowest-tax, simplest and most private route the law allows, best first. Each step names the rule it rests on and the condition that keeps it lawful.

  1. Zero-cost rule: never trade between wallets you control or that act with you. 15 U.S.C. §78i(a)(1) bans no-change-of-ownership trades in securities, and the CFTC reached spot wash trading in its 2021 Coinbase order. Move funds between your own wallets as plain transfers.
  2. Let volume be what it genuinely is. Low volume carries no legal cost, while buying ‘volume support’ put token leaders beside the firms in the 2024 Boston charges. Catch: exchange listing thresholds tempt the shortcut, and paid-for volume is wash trading whoever executes it.
  3. If you run several wallets for ordinary reasons such as treasury and operations, label them publicly and keep records of each movement’s purpose; MiCA Article 91(2)(a) excuses transactions with legitimate reasons, but only records can show them.
  4. Different law, same word: as of October 2026 the tax wash-sale rule, 26 U.S.C. §1091, covers stock or securities and has not been extended to digital assets by statute. That tax gap is no licence for market wash trading, which remains manipulation.

Materials7 U.S.C. §6c(a) and 15 U.S.C. §78i(a)(1), on law.cornell.eduCFTC press release 8369-21 (19 March 2021) on the Coinbase GDAX orderThe US Attorney’s Office (District of Massachusetts) releases on CLS Global’s sentencing (2 April 2025) and MyTrade’s founder’s sentencing (6 August 2026)A decentralised exchange’s trade history for one token, with wallet addresses visible

Wonder

  1. If no one loses money on a trade with myself, why is it illegal?
  2. Is this the same ‘wash sale’ that tax rules talk about?
  3. Can wash trading be seen on a public blockchain?

Explore

  1. In its August 2026 release on the MyTrade case, the Justice Department described wash trading as one trader, or several working together, buying and selling the same asset repeatedly to mislead the market by inflating its trading volume or price through trades with no lawful commercial purpose. Ownership does not really change, yet the trade is printed as activity. Volume matters because data sites rank tokens by it, exchanges set listing thresholds on it, and buyers read it as interest. This has nothing to do with the tax ‘wash sale’ rule about repurchasing after a loss (lessons 2.3.3 and 7.1.2): same word, different law.
  2. For derivatives, the Commodity Exchange Act is explicit. 7 U.S.C. §6c(a) makes it unlawful to enter into a futures, option or swap transaction that is, or is commonly known as, a ‘wash sale’ or ‘accommodation trade’, or is a fictitious sale, or is used to report a price that is not true and bona fide. For securities, 15 U.S.C. §78i(a)(1) bans, for the purpose of creating a false or misleading appearance of active trading, any transaction involving no change in beneficial ownership, and matched orders of substantially the same size, time and price entered by or for the same or different parties.
  3. Spot crypto is not covered by §6c(a), so the CFTC has used its general anti-fraud power instead. On 19 March 2021 it ordered Coinbase to pay a $6.5 million civil penalty. The order found that from 2015 to 2018 two Coinbase trading programs on its GDAX platform, Hedger and Replicator, at times matched each other, and that the resulting trades were reported to price and data services, potentially creating a false picture of volume and liquidity. It also found that a former employee placed matching Litecoin/Bitcoin orders as wash trades over six weeks in 2016, a manipulative or deceptive device, for which Coinbase was vicariously liable.
  4. Criminal enforcement arrived through an FBI sting. Agents created NexFundAI, a token on Ethereum traded on Uniswap, and approached ‘market makers’. A CLS Global employee explained that its algorithm ‘basically does self-trades, buying and selling... from multiple wallets so it’s not visible’, adding: ‘I know that it’s wash trading’. CLS Global pleaded guilty in January 2025 to conspiracy to commit market manipulation and wire fraud and to wire fraud. On 2 April 2025 it was ordered to pay $428,059, covering a fine and seized crypto, and put on probation for three years, during which it may not participate in US crypto markets.
  5. On a decentralised exchange, wash trades leave fingerprints anyone can read. MyTrade’s founder told undercover agents his firm ‘does self-trades - a buy and a sell in the same second’. Its bots had been producing millions of dollars of daily wash trades for about 60 tokens before his October 2024 plea required them to be switched off. Outside the US, MiCA Article 91(2)(a) treats any transaction or order that gives false or misleading signals about a crypto-asset’s supply, demand or price as market manipulation unless done for legitimate reasons, and has applied across the EU since 30 December 2024.
  6. The firm executing the trades is not the only one exposed. In the Boston cases, the leaders of token companies that paid for ‘volume’ were charged alongside the firms that produced it (lessons 6.1.1 and 6.1.6). A practical check on any token: open its trade history on a block explorer or exchange interface and look for the same few addresses buying and selling similar amounts back and forth, wallets funded from one source, and volume that collapses when one address goes quiet. Compare the reported daily volume with the number of distinct traders; a large figure produced by very few wallets is a warning.

Key facts

  • 7 U.S.C. §6c(a) prohibits futures, option and swap transactions that are, or are commonly known as, wash sales, accommodation trades or fictitious sales.
  • 15 U.S.C. §78i(a)(1) prohibits securities transactions with no change in beneficial ownership, and matched orders, made to create a false or misleading appearance of active trading.
  • On 19 March 2021 the CFTC ordered Coinbase to pay a $6.5 million civil penalty for false, misleading or inaccurate reporting and for wash trading by a former employee on GDAX.
  • The FBI created a token called NexFundAI, traded on Uniswap, to identify firms offering wash trading services.
  • CLS Global was sentenced on 2 April 2025 to pay $428,059 and to three years’ probation, during which it may not participate in US crypto markets.
  • MiCA Article 91(2)(a) treats transactions or orders giving false or misleading signals about a crypto-asset’s supply, demand or price as market manipulation unless carried out for legitimate reasons.

Exercise nine, six, three, one

9CollectList up to 9 signals you could check in a token’s public trade history, such as the number of distinct traders, repeated round trips between the same wallets, or the timing of large trades.
6ClusterSort them into 6 categories: who is trading, how wallets were funded, trade sizes, trade timing, how volume compares with holders, and what happens to volume over time.
3DistillReduce the 6 categories to 3 groups: signals that strongly suggest self-trading, signals with innocent explanations, and signals you cannot assess without more data.
1CrystallizeWrite 1 sentence explaining, in your own words, why a trade with yourself can mislead other people even though you lose nothing on it.

Fact check

Dates, figures and claims checked against the published sources listed below.

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