Wash Trading

Wash trading means: someone buys and sells the same asset – for instance a stock, a cryptocurrency, or a digital collectible – to themselves, either simultaneously or in quick succession. On paper, this creates the appearance of brisk trading. In reality, nothing has changed: the owner has remained the same, and no genuine buyer has made a decision. It is a staged performance. The goal is almost always to deceive others: a high trading volume appears to outsiders like genuine market interest. This causes prices to rise artificially, or makes a product look more popular than it actually is.

Why wash trading poisons markets

Functioning markets rely on a fundamental principle: prices arise from genuine supply and demand. Wash trading undermines exactly that. An investor who sees a high trading volume concludes that many people are actively engaged in this market. But this conclusion is false if the volume has been faked. One ends up making decisions based on manipulated figures.

The damage is concrete. An investor buys a cryptocurrency because the trading volume on a trading platform looks high – and later discovers that hardly anyone else genuinely wanted to buy. The price collapses. Wash trading can also be used to evade taxes or to fraudulently obtain commissions, when platforms reward traders for high volume.

How wash trading works in practice

The simplest variant: a person owns two accounts on the same trading platform. Account A sells a hundred units of a cryptocurrency to Account B. Account B sells them back. Both accounts belong to the same person, and the price can be set higher or lower in the process. To the outside world, the platform shows: two hundred units traded.

More elaborate, but harder to detect: several people arrange in advance and trade with each other in a coordinated manner. Each pretends to be acting independently. This is also called collusive trading or, in English technical jargon, collusive wash trading. Here it’s not the same accounts, but the same principle: the volume is staged, and no genuine market participant is making a free decision.

Regulated exchanges such as the Frankfurt Stock Exchange or the New York Stock Exchange (NYSE) have surveillance systems that detect unusual patterns. Anyone placing two identically sized buy and sell orders seconds apart will be flagged. On less regulated crypto platforms, however, this oversight is considerably weaker.

Wash trading in crypto markets and NFTs

In traditional financial markets, wash trading has been banned for decades – in the US, for example, since the Commodity Exchange Act of 1936. In the crypto space, regulation lags behind. Several independent studies have shown that on unregulated crypto exchanges, a significant portion of reported trading volume is generated through wash trading. The blockchain analysis firm Chainalysis estimated in a report that in the NFT market alone – that is, trading in unique digital objects such as artworks or trading cards – wash trading in the billions took place in 2022.

NFTs are particularly well suited to this kind of manipulation. A seller can shift the same token back and forth between their own wallets – that is, digital wallets – again and again, slightly raising the price each time. This creates an artificial price history that suggests to genuine buyers that the object is sought-after and holds value. When someone then actually buys it, the manipulator pockets the profit.

The term now regularly appears in news coverage of crypto regulation. Regulatory authorities such as the US SEC or the European ESMA explicitly name wash trading as one of the biggest risks in digital asset markets. It is not a niche technical topic – it determines whether market data can be trusted.