Glossary
Wash trading
Wash trading is buying and selling the same asset with yourself, or with colluding partners, so that trades appear with no real change of ownership. It inflates reported volume and can mislead buyers about liquidity and demand. It is a form of market manipulation.
Also called wash trade, fake volume, artificial volume, volume inflation, circular trading, self-trading
See also
Wash trading is buying and selling the same asset with yourself, or with partners acting in concert, so that trades appear on the tape while nothing really changes hands. The owner ends up roughly where they started. What changes is the public picture: volume climbs, and a token or an exchange looks more liquid than it is.
The practice is older than crypto. US commodities law lists the “wash sale” among the trades nobody may offer, enter into or confirm in futures, options or swaps (7 U.S.C. 6c).
How wash trading works: the same money, counted again and again
- One party controls both sides of the trade: two accounts of the same owner, a ring of colluding accounts, or a bot that trades against itself.
- It buys an asset and sells it back at about the same price, over and over, so its net position barely moves.
- Every leg counts as reported volume, while the real cost is limited to fees and slippage.
- The swollen volume feeds rankings, “trending” lists and token screens, where it attracts real buyers or helps win a listing.
On a decentralized exchange, the data firm Bitquery has documented a sharper version. Look-alike tokens sit in pools traded almost only by one cluster of wallets, and price screens value both sides of a pool at the pool’s own price. One fake LSK pool held about $19 in USDC while DEXScreener displayed some $579 million of liquidity.
A worked example: $10,000 that books $20 million
Take a hypothetical bot holding $10,000 in USDC. It swaps into a token and back: two trades of $10,000, so $20,000 of reported volume. Repeat it N times and the volume is $10,000 x 2 x N, while the capital stays at $10,000 minus fees.
Fees decide whether the trick pays. Raydium’s documentation lists concentrated-liquidity pool tiers of 0.01%, 0.05%, 0.25% and 1%. Each swap pays the fee on $10,000, so a round trip pays it twice.
| Round trips | Reported volume | Fees at 0.01% | Fees at 0.25% |
|---|---|---|---|
| 1 | $20,000 | $2 | $50 |
| 100 | $2,000,000 | $200 | $5,000 |
| 1,000 | $20,000,000 | $2,000 | $50,000 |
That last cell cannot happen. At 0.25%, 200 round trips ($10,000 / $50) would eat the whole stake, so wash trading at scale needs the cheapest tier, or a pool where the trader earns back its own fees as the main liquidity provider.
Documented cases, from 2019 to October 2026
In the freshest case, Bitquery reported on 21 October 2026 that one wallet accounted for about $1.40 billion of the $6.17 billion traded on Raydium’s concentrated-liquidity pools between 21 September and 20 October, or 22.7%, with about 12,000 USDC of working capital. In one round trip it put 11,102 USDC into a pool and sold the tokens back 22 seconds later for 11,100.87 USDC: $22,200 of volume for $1.13 plus network fees. That is about 0.005%, below the lowest listed tier, and Bitquery does not say why. Our report on the Raydium wash bot has the details.
Centralized exchanges were the target in March 2019, when Bitwise told the SEC that about 95% of the bitcoin volume reported across 81 exchanges was fake or non-economic. That was Bitwise’s own estimate, made while it sought approval for a bitcoin ETF.
Academics reached a similar result. Cong, Li, Tang and Yang tested 29 exchanges with statistical methods and found wash trading averaged over 70% of reported volume on the exchanges they class as unregulated (NBER working paper 30783, published in Management Science in 2023).
On 9 October 2024, the US Justice Department unsealed “Operation Token Mirrors”, charging 18 individuals and entities, among them the market makers Gotbit, ZM Quant, CLS Global and MyTrade. Gotbit founder Aleksei Andriunin pleaded guilty and in June 2025 was sentenced to eight months in prison, according to The Block, though his lawyer later described it as time served.
Wash trading is not the wash-sale tax rule
Readers searching “wash trading crypto tax” often mean something else. The US wash-sale rule (section 1091 of the Internal Revenue Code) disallows a loss on a sale when you buy substantially identical holdings within 30 days before or after. It covers stock and securities; bills to extend it to digital assets have been tabled, and as of October 2026 none had been reported enacted. Wash trading is market manipulation; the two share only a word.
Why fake volume misleads, and where the law stands
Many people judge an exchange or a token by its volume. Inflated, that shortcut points the wrong way, and in Token Mirrors fake activity was used to draw buyers into tokens. Estimates also vary with method and year, so the 95% and 70% figures cannot be compared.
In the EU, MiCA’s Article 91 bans transactions likely to give false or misleading signals on the supply, demand or price of a crypto-asset, unless carried out for legitimate reasons (ESMA rulebook). Our guide to the MiCA regulation explains who it covers; how it reaches anonymous on-chain pools is unclear.
Wash trading: questions readers ask
Is wash trading illegal?
In regulated markets, yes. US law bans wash sales in futures, options and swaps, and MiCA bans misleading transactions on crypto-assets in the EU. For US spot crypto, prosecutors have used fraud and market-manipulation charges instead, as in Token Mirrors. On anonymous DEX pools, enforcement is much harder and the legal reach is unsettled.
How can you spot wash trading?
Look for warning signs, not proof: volume far larger than the money sitting in the pool or order book, oddly regular or round trade sizes, and buys matched by sells seconds later from linked wallets. Comparing the same pair’s volume across several venues also helps.
Is market making the same as wash trading?
No. A market maker posts buy and sell orders so that others can trade, and it takes real positions against real counterparties. Wash trading has no genuine change of ownership and exists to send false signals.
What is wash trading in NFTs?
The same trick on collectibles: an owner sells an NFT back and forth between wallets they control, so it looks more valuable. Chainalysis data for 2021, counting Ethereum and wETH sales only, found 110 wash traders who made a profit, about $8.9 million between them, as Infosecurity Magazine reported.