The laws against benchmark manipulation in the United States run through four main statutes: the Commodity Exchange Act, the Securities Exchange Act of 1934, the federal wire fraud statute, and the Sherman Antitrust Act. The United Kingdom and the European Union maintain parallel regimes. Corporate penalties for rigging rates like LIBOR and the WM/R foreign exchange fix have passed $9 billion worldwide, and individual traders have gone to prison, though the most prominent UK convictions were quashed on appeal in 2025.
What Benchmark Manipulation Actually Is
A financial benchmark is a published rate, price, or index used to price other contracts: adjustable-rate mortgages, derivatives, foreign exchange settlements, commodity futures. LIBOR, before its retirement, set the reference rate for an estimated $300 trillion in financial products.
Manipulation is deliberate deception designed to push the published rate in a direction that benefits the manipulator’s existing positions. Three patterns recur. Submitters at panel banks reported figures unmoored from their actual borrowing costs. Traders at competing banks coordinated submissions through chatrooms with names like “The Cartel” and “The Bandits’ Club” so that trimmed averages still moved. And in transaction-based benchmarks like the WM/R foreign exchange fix, traders fired off large orders in the seconds before the calculation window closed, forcing the published rate in their direction.
U.S. Federal Laws and Their Penalties
The Commodity Exchange Act
Section 6(c)(1), as amended by Dodd-Frank in 2010, makes it unlawful to use any manipulative or deceptive device in connection with any swap or commodity contract in interstate commerce. The statute also prohibits knowingly delivering false or misleading information about market conditions that could affect commodity prices; good-faith mistakes are excluded.1Office of the Law Revision Counsel. 7 US Code 9 – Prohibition Regarding Manipulation and False Information
The CFTC enforces these prohibitions through Rule 180.1, which bars manipulative or deceptive conduct carried out intentionally or recklessly, regardless of whether the conduct actually created an artificial price.2Commodity Futures Trading Commission. Anti-Manipulation and Anti-Fraud Final Rules Prosecutors do not have to show the attempt succeeded.
The Securities Exchange Act of 1934
When manipulation involves securities or security-based swaps, the SEC acts under Section 10(b), which prohibits manipulative or deceptive devices in connection with the purchase or sale of any security, and extends to security-based swap agreements.3Office of the Law Revision Counsel. 15 US Code 78j – Manipulative and Deceptive Devices The SEC adopted Rule 9j-1 to address fraud and manipulation specifically in security-based swap transactions.4Securities and Exchange Commission. Prohibition Against Fraud, Manipulation, or Deception in Connection with Security-Based Swaps
Wire Fraud
Nearly every benchmark manipulation case also supports wire fraud charges under 18 U.S.C. § 1343, because the chatroom messages and electronic submissions themselves qualify as interstate wire communications used to execute a scheme to defraud. The penalty is up to 20 years in prison. When the fraud affects a financial institution, the ceiling rises to 30 years and the maximum fine goes to $1 million.5Office of the Law Revision Counsel. 18 USC 1343 – Fraud by Wire, Radio, or Television
The Sherman Antitrust Act
Traders at competing banks who agree to push a benchmark in a coordinated direction are engaged in price-fixing. Section 1 of the Sherman Act makes every conspiracy in restraint of trade a felony punishable by up to $100 million in fines for a corporation, $1 million for an individual, and up to 10 years of imprisonment.6Office of the Law Revision Counsel. 15 US Code 1 – Trusts, Etc., in Restraint of Trade Illegal; Penalty Antitrust counts stack on top of fraud and manipulation charges rather than replacing them.
Statute of Limitations
Federal regulators have five years from the date a claim accrues to bring a civil enforcement action for fines and penalties.7Office of the Law Revision Counsel. 28 USC 2462 – Time for Commencing Proceedings Criminal charges carry their own limitations periods by offense. Because manipulation schemes typically involve ongoing conspiracies, the clock may not start running until the last act in furtherance of the scheme.
UK Laws and the 2025 Reversal
Section 91 of the Financial Services Act 2012 created two offenses tailored to benchmarks: making false or misleading statements intended to influence a benchmark’s setting, and creating a false or misleading impression about prices or interest rates with knowledge that the impression may affect a benchmark.8Financial Conduct Authority. Benchmark Enforcement
The Financial Conduct Authority has used this authority aggressively. UK banks paid over £757 million in FCA fines for LIBOR and EURIBOR misconduct and an additional £1.4 billion for failures tied to foreign exchange benchmarks.8Financial Conduct Authority. Benchmark Enforcement
Individual UK prosecutions have been less durable. In July 2025, the UK Supreme Court quashed the convictions of Tom Hayes and Carlo Palombo, the two most prominent individuals convicted of conspiracy to defraud in connection with LIBOR manipulation. Hayes had been sentenced to 14 years, reduced to 11 on appeal. Palombo received four years. The Supreme Court found the trial judge had misdirected the jury, and the ruling has cast doubt on other LIBOR-related convictions in England and Wales. The statutory prohibition against benchmark manipulation remains intact; what the ruling undermined was the use of general conspiracy-to-defraud charges as the vehicle for those prosecutions.
EU Benchmark Regulation
The European Union went further than other jurisdictions by writing a standalone law. The Benchmark Regulation (BMR), adopted in 2016, governs the whole lifecycle of a benchmark: how it is calculated, who may administer it, and what controls must be in place.9European Securities and Markets Authority. Benchmarks Regulation
Administrators must be authorized and supervised. They must document and publish their methodology, separate submission functions from trading desks, and maintain governance controls designed to kill the conflict of interest that drove historical manipulation.10European Commission. Frequently Asked Questions: Benchmarks Regulation
As of January 2026, the BMR’s transition period for third-country benchmarks has ended. The European Securities and Markets Authority is now the single supervisory authority for all non-EU benchmarks used within the EU, and non-EU administrators of significant benchmarks must seek recognition or endorsement under the BMR to continue being used by EU-supervised entities.11STOXX. FAQ: Changes to the BMR Regulation on January 1, 2026
Corporate Fines Actually Imposed
The CFTC alone imposed over $4 billion in penalties against 13 banks and brokers for LIBOR and foreign exchange benchmark abuses.12Commodity Futures Trading Commission. Deutsche Bank to Pay $800 Million Penalty to Settle CFTC Charges of Manipulation, Attempted Manipulation, and False Reporting of LIBOR and Euribor For the FX cases, the CFTC assessed $1.875 billion against six banks, with individual penalties ranging from $275 million for HSBC to $400 million for Barclays.13Commodity Futures Trading Commission. Barclays to Pay $400 Million Penalty to Settle CFTC Charges of Attempted Manipulation of and False Reporting Concerning FX Benchmark Rates Add the FCA, DOJ, and other global regulators, and combined worldwide penalties for LIBOR-related misconduct alone exceeded $9 billion.
Settlements rarely stop at the fine. Deferred prosecution agreements require banks to overhaul compliance structures, implement internal controls separating trading from rate submission, and submit to monitoring for years. Under federal tax law, these penalty payments are generally not deductible as business expenses. Fines imposed as punishment for violating the law are nondeductible, though payments specifically designated as restitution to victims may be treated differently.
Individual Prison Sentences
In the Rabobank prosecution, former global head of liquidity Anthony Allen was sentenced to 24 months in prison. Senior trader Anthony Conti received 12 months and one day. Both were convicted of conspiring to manipulate U.S. Dollar and Japanese Yen LIBOR.14U.S. Department of Justice. Two Former Rabobank Traders Sentenced to Prison for Manipulating US Dollar and Japanese Yen LIBOR Interest Rates Rabobank itself entered a deferred prosecution agreement and paid a $325 million penalty.
Individual penalties beyond prison can include personal financial sanctions, orders of restitution, and permanent bars from the financial industry.
Civil Lawsuits by Affected Counterparties
Regulatory fines are only part of the exposure. Investors, pension funds, municipalities, and other parties who held contracts tied to manipulated benchmarks have filed class-action lawsuits against the offending banks, arguing that artificially set rates caused them to receive less under swap contracts or pay more on adjustable-rate loans. Civil settlements have reached hundreds of millions of dollars, separate from regulatory penalties. Municipalities holding interest rate swaps tied to LIBOR were among the most active plaintiffs.
These claims are not easy. Plaintiffs must show the benchmark was actually artificial during the relevant period, that their specific contract was affected, and that they suffered quantifiable losses. Expert testimony is expensive, and defendants routinely challenge whether the manipulation was material to any individual plaintiff’s contract.
Whistleblower Awards and Protection
Both the SEC and CFTC run whistleblower programs built around the same formula. An individual who voluntarily provides original information leading to a successful enforcement action with more than $1 million in monetary sanctions can receive between 10% and 30% of the sanctions collected.15Commodity Futures Trading Commission. Frequently Asked Questions16U.S. Securities and Exchange Commission. Whistleblower Program Against penalties in the hundreds of millions, a qualifying award can run into the tens of millions.
To qualify, the information must be submitted through the agency’s formal tip process, it must be original, and it must lead the agency to open a new investigation or pursue a new line of inquiry in an existing one.17Commodity Futures Trading Commission. The Whistleblower Program
Federal law also shields whistleblowers from employer retaliation. Section 806 of the Sarbanes-Oxley Act protects employees at covered companies who report conduct they reasonably believe constitutes securities fraud, wire fraud, bank fraud, or violations of SEC rules. An employer who terminates, demotes, or otherwise punishes an employee for reporting benchmark manipulation faces liability for back pay, reinstatement, and compensatory damages.