An account that places large orders and cancels them within seconds, each time trading on the other side, is spoofing: the orders were never meant to fill. In June 2026 a California trader, Mingran Wang, pleaded guilty to "more than 3,000 instances of manipulative trading and spoofing" from 2021 through 2024, run through accounts "at different brokerage firms" (Justice Department, 25 June 2026).
Profits from schemes like this are proceeds of crime.
What is market manipulation?
The EU's Market Abuse Regulation (MAR) gives the fullest legal definition. Article 12 covers three kinds of act: a trade or order that gives "false or misleading signals as to the supply of, demand for, or price of, a financial instrument" or secures its price "at an abnormal or artificial level"; trading that uses "a fictitious device or any other form of deception or contrivance"; and spreading false or misleading information. Article 15 bans manipulation and any attempt at it.
Picture a trader (illustrative) who buys a thinly traded share in the last minutes of the session so that the closing price, used to value a fund, ends higher. No false statement is made, yet the closing price is no longer real. That is trading "at the opening or closing of the market", one of the behaviors Article 12(2) lists.
Like other financial crime, manipulation deceives, and its impact falls on the market as a whole.
What are the types of market manipulation?
- Spoofing and order book layering. Orders placed to be canceled, so that others trade on a false picture of demand. The CFTC's first spoofing case under the Dodd-Frank Act, against Panther Energy Trading and Michael Coscia, found an algorithm "designed to unlawfully place and quickly cancel orders" and ordered a 1.4 million dollar penalty plus 1.4 million dollars of disgorgement (CFTC release 6649-13, 22 July 2013). A jury convicted Coscia in the first federal spoofing prosecution (3 November 2015).
- Wash trading. Buying and selling to oneself to fake volume; the Commodity Exchange Act bans a "wash sale" (7 U.S.C. 6c).
- Pump and dump. Talking up a thinly traded stock, then selling into the rise. US securities law, enforced by the SEC, bars trades made "for the purpose of inducing the purchase or sale" of a security by others (15 U.S.C. 78i).
- Marking the close. Trading at the open or close to move the reference price and mislead investors who rely on it (MAR Art 12(2)(b)).
- Benchmark manipulation. False or misleading statements made for the setting of a benchmark, a crime in the UK under section 91 of the Financial Services Act 2012.
- Squeezes and cornering. Using a dominant position over supply to fix prices (Art 12(2)(a)).
- Misleading statements and voiced opinions. Commenting on an instrument after taking a position in it without disclosing that conflict (Art 12(2)(d)).
Order book layering in item 1 is not the layering stage of money laundering, which hides where funds came from.
Real life examples reach banks and whole markets. JPMorgan agreed in September 2020 to pay "over $920 million" over spoofing schemes in precious metals and US Treasury markets (Justice Department). Navinder Sarao pleaded guilty in November 2016 over a scheme that included the 6 May 2010 Flash Crash, when the Dow "plunged 600 points in five minutes" (Justice Department).
How does market manipulation differ from market abuse and insider dealing?
Market abuse is the wider family. MAR treats it as three behaviors: insider dealing, unlawful disclosure of inside information and market manipulation (recital 7). Insider dealing trades on information the market does not have; manipulation creates a false picture of the market itself. Both do the harm MAR names: market abuse "harms the integrity of financial markets and public confidence in securities and derivatives" (recital 2).
Insider dealing is also a different offense from insider fraud, in which staff defraud their own employer. The overlap is in the data: the same trader can show both patterns, and the same surveillance alert can point to either.
Which laws prohibit market manipulation?
Table 1. Market manipulation rules by jurisdiction (as of October 2026).
| Jurisdiction | Rule | What it bans | Reporting duty | Status, October 2026 |
|---|---|---|---|---|
| European Union | MAR Arts 12, 15 and 16; Directive 2014/57/EU for criminal sanctions | False or misleading signals, deceptive devices, false information | A suspicious transaction and order report (STOR) to the competent authority without delay | In force |
| United Kingdom | UK MAR Article 16; Financial Services Act 2012 ss89 to 91 | The same acts; misleading statements, impressions and benchmarks as crimes | STOR to the FCA | In force, repeal planned (FSMA 2023 Schedule 1), no date set |
| United States, securities | Exchange Act s9(a)(2) and s10(b); Rule 10b-5 | Trades to induce others; "any device, scheme, or artifice to defraud" | Broker dealer SAR from 5,000 dollars (31 CFR 1023.320) | In force |
| United States, commodities | CEA s4c(a)(5)(C) and s6(c)(1); CFTC Rule 180.1 | Spoofing, "bidding or offering with the intent to cancel the bid or offer before execution"; manipulation done "intentionally or recklessly" | CFTC enforcement and exchange rules | In force |
| European Union, crypto assets | MiCA Arts 91 and 92 | Market manipulation in crypto assets | Report any reasonable suspicion without delay | Applies from 30 December 2024 |
Market manipulation is also a money laundering predicate. "Insider trading and market manipulation" is one of the FATF's designated categories of offenses (FATF Recommendations, Glossary, June 2026) and of the offenses in Directive (EU) 2018/1673, Art 2(1)(u).
Cryptocurrency has its own cases: Celsius founder Alexander Mashinsky pleaded guilty in December 2024 to schemes that included manipulating the price of CEL, Celsius's own token, while selling CEL "at artificially inflated prices" (US Attorney, Southern District of New York).
How do firms detect and prevent market manipulation?
Back to Wang: the spoof orders sat at different brokerage firms, so each firm held only part of the pattern. Each broker's surveillance saw orders placed and canceled; each AML team saw money moving between accounts. Detection is two jobs.
The first is order and trade surveillance. MAR names no detection software: Article 16(2) asks anyone professionally arranging or executing transactions for "effective arrangements, systems and procedures to detect and report suspicious orders and transactions", and for a STOR without delay. The second is AML: a US broker dealer files a suspicious activity report from 5,000 dollars, and mirror trading, matched buy and sell orders used to move money across borders, is the laundering pattern that looks most like manipulation.
On the AML side, low value orders that each fall under a rule can still form a pattern together, which is why AML for investment and wealth firms starts from one record per client.
One suspicious pattern can need two reports to two authorities: a STOR to the market regulator under MAR Article 16 because the orders may be manipulation, and a suspicious activity report to the FIU when the profits look like proceeds, since "insider trading and market manipulation" is a predicate offense under FATF's list and Directive (EU) 2018/1673. So the firm settles in writing which alerts go to the market regulator, which to the FIU and who rules when both apply, and the surveillance team and the AML team stop assuming the other has filed.
What changed for market manipulation rules in 2026?
- 24 June 2026. Wang pleaded guilty to spoofing run through accounts at several brokers; the Justice Department announced the plea the next day.
- October 2026. UK MAR Article 16 is in force. legislation.gov.uk lists its revocation by the Financial Services and Markets Act 2023 among the changes not yet applied, and no commencement date is set.
Related terms
- Financial crime. Offenses committed through money, financial services or markets, market abuse among them.
- Financial fraud. Deception for financial gain, including insider dealing and market manipulation offenses.
- Mirror trading. Matched trades in two markets used to move money across borders.
- Insider fraud. Fraud committed by staff against their own employer.
- Layering. The money laundering stage in which a chain of transfers hides the source of funds.
- MiCA. Regulation (EU) 2023/1114, whose Articles 91 and 92 carry the market abuse rules over to crypto assets.
How this entry was checked. The definition follows MAR Article 12, and the closing price trader is illustrative. Every rule and case above was reopened by Javid Khasayev, Senior Anti Fraud Specialist at GoldenPay, against the draft by Melis Alparslan (Regional Sales Manager, complead): the Market Abuse Regulation (EU) No 596/2014, UK MAR and the Financial Services Act 2012, Exchange Act section 9 and Rule 10b-5, Commodity Exchange Act section 4c and CFTC Rule 180.1, MiCA, Directives 2014/57/EU and (EU) 2018/1673, the FATF Glossary (June 2026), 31 CFR 1023.320, the CFTC release 6649-13 and the Justice Department releases linked in the text. Last reviewed: 30 October 2026.
