When does arbitrage become market manipulation?
A screen, April 4, 2025, shows the Dow Jones industrial average after making transactions on the new York Stock Exchange after the closing bell in New York.
Brendan McDermid | Reuters
The line between arbitrage and market manipulation has long been one of the most gray areas in the financial markets-and India’s last action against the high-frequency trade giant Jane Street has made this dark border a sharp focus.
Arbitrage, essentially, is like detecting an incompatibility and trying to make a profit from it – and that is completely legal. It refers to the simultaneous purchase and sale of an asset in different markets to benefit from price differences.
Market manipulation, on the contrary, is an illegal action designed to deceive or distort the free and fair functioning of markets – by affecting the misleading appearance of prices or supply and unfair advantage.
But when does Arbitrage become illegal?
According to the experts CNBC speaks, the distinction depends on the intent and market effect.
This is the manipulation, especially in less liquid markets – on the other hand, without aligning to profit.
Pradeep Yadav
Professor of Finance at the University of Oklahoma
On July 3, the Indian securities and the stock market Board (Sebı) temporarily prevented Jane Street Group’s participation in the country’s securities markets and accused the US high -frequency trade company of large -scale market manipulation. This includes the tactics of manipulating India’s Nifty 50 Index to make profits from large positions in the index options.
Sebi’s 105 -page interim order, the company’s performance of the Indian banking sector in the early hours of the company, which is based on the elegant bank index, which follows the performance of large amounts of stocks and futures. Later, he placed important bets in the index, which envisaged a decrease in the index later.
Sebi added that Jane Street later sold these purchases and pushed the index lower and increased the profitability of option positions. The regulator argued that this is part of a “intentional strategy to manipulate indices” for the benefit of larger and more lucrative options bets.
Sebi said that the intensity and pure scale of the intervention was considered manipulative when combined with the rapid relaxation of positions without any reasonable economic logic.
Jane Street, objected to the findings of Sebi’s temporary order, reported to employees that their actions were planning to challenge their actions while claiming that their actions were “basic index arbitrage trade”.
The trade firm will then deposit $ 567 million in an account on July 14th, as guided by Sebı before asking for permission and restrictions to continue trade in the country.
Key: mens rea
As the legal began back and forth, industrial veterans said that the difference between legal arbitrage and illegal manipulation is not always clear.
Pradeep Yadav, Professor of Finance University of Oklahoma, is the key to determining manipulation behind the tradesmen known as the mens rea, which means “guilty mind” in Latin. He also pointed out that creating an arbitrage opportunity by affecting prices in a less liquid market that makes the line illegal.
“Arbitrage is manipulating the market by manipulating the less liquid side of the market, turning into market manipulation,” he said, explaining that the option market in India is very liquid thanks to large amounts of buyers and sellers. However, the country’s location and term trading markets are less, which makes it easier to force the prices by making large enough transactions.
Although such an arbitrage is aggressive, it is legal and often useful for market efficiency.
V Raghunathan
OLD SEBI Board Member
Sebi’s case is based on two claims. First, Jane Street deliberately broke the less liquid cash market to profit more in the liquid option market. Indeed, Sebi referred to a previous judgment of a case against Jane Street: “Nobody is intentionally traded for the loss. It is definitely a deliberate trade, not a real agreement in securities.”
Secondly, his profit argues that the transactions are designed to carry prices rather than reflecting the real market views, with their profit from completely options, stocks and consistent losses in the future.
“Mens Rea is showing malicious intention to manipulate the market … If the prices are already aligned, it is good to arbitrate them. But if the prices – especially the less liquid market – to make profit in the less liquid market, then this manipulation, then,” the size of the optorg, in the size of the optorgian, the size of the option, the greatness of the trade, In his opinion, imbalance argued that there was no classic arbitrage case.
A Justitia statue has a weighing bowl in front of a regional court.
Picture Alliance | Picture Alliance | Getty Images
Other experts also stressed that the fine line between market manipulation and arbitrage is intent.
However, V Raghunathan, a former member of the primary market board, believes that Jane Street’s actions are in the legal realm. Jane Street, for example, developed in ETF pricing against the basic securities or between stock exchanges or by using one minute inefficiency between changes.
“This kind of arbitrage is aggressive, although it is aggressive, it is useful for legal and market efficiency.” He said.
The delay arbitrage example – that companies have made profits from small time delays in market data in spaces – were criticized as parasitic or predators, but almost illegal.
However, Raghunathan’s wider concern is whether Jane Street’s strategies are approaching manipulation – either with intention or in the letter of the law.
Like other experts CNBC, Raghunathan deliberately influenced market manipulation, artificial tendencies or unfair advantages such as pump and bulk schemes and washing trade.
“In short, Jane Street’s identity fraud, abuse of hidden information, or none of the prices are accused – unless it is considered to be dealing with market manipulation, unless it puts deceptive orders,” he said.
Alphacution Research Research Director Paul Rowady said that the lines between manipulation and arbitration are also connected to the regulator’s teeth. Similar claims in the US will depend on the fraud or deception of a firm.
“Aggressive trade is not a crime,” he said.
Market observers reiterated that Jane Street cases emphasized the security vulnerabilities of India’s market structure, including the liquidity imbalances between spot and option and option markets, which regulators can now try to get bored by sophisticated players.
According to Sebi, A new study 9.6 million individual self -derivative traders announced that 91% of the traders lost money last year.
As a former US SEC plaintiff, Howard Fischer puts it, Arbitragege is similar to “looking at the neighbor’s house, holding newspapers and burning candles everywhere and taking fire insurance at home”.
“Manipulation gives him fireworks and propane tanks on July 4,” Fischer, a partner of the law firm Moses & Singer. He said.
The discrimination lies in intent: arbitrage benefits from inefficiency; Manipulation tries to produce them.
