15 USC 78i: Manipulation of Security Prices, Penalties, and Suits

Section 9 of the Securities Exchange Act of 1934, codified at 15 U.S.C. 78i, makes it a federal offense to manipulate security prices through deceptive trading tactics. The statute targets conduct designed to create false signals about supply, demand, or value: wash sales, matched orders, misleading statements, and similar schemes aimed at inducing others to buy or sell. Violations can bring civil penalties above $236,000 per violation for individuals, criminal sentences up to 20 years, and private damages lawsuits from investors who traded at manipulated prices.¹

What the Statute Prohibits

Section 78i(a) lists specific tactics rather than banning “manipulation” in the abstract. Each subsection targets a different way a trader might fabricate the appearance of genuine market activity.

Wash Sales

A wash sale is a transaction where the same person or entity is on both sides of the trade, so ownership never really changes hands. The only purpose is to make the tape show volume that isn’t there. Subsection 78i(a)(1)(A) prohibits these trades when they are done to create a false or misleading impression of active trading.¹

Matched Orders

Matched orders are the two-party version of the same trick. Two traders coordinate so that a buy order and a sell order of similar size and price hit the market together, manufacturing the illusion of real interest. Subsections 78i(a)(1)(B) and (C) prohibit entering an order while knowing that a matching order has been or will be entered by the same party or someone acting with them.¹

False Statements and Pump-and-Dump

Subsection 78i(a)(4) bars making false or misleading statements about a security to induce trading. This is the provision behind classic pump-and-dump prosecutions: promoters push a stock through misleading press releases, social posts, or fabricated financial data, then unload their shares once the price rises and other investors are left holding overvalued stock.

Spoofing and Layering

Spoofing means placing large orders you never intend to fill, letting other traders react to the phantom supply or demand, and then canceling. Layering does the same across multiple price levels. The first federal criminal spoofing conviction was Michael Coscia, who in 2015 was sentenced to three years in prison for running automated algorithms that placed and canceled deceptive orders in futures markets.²

Manipulative Short Selling

Short selling is legal. Using short sales to deliberately drive a stock’s price down is not. Naked short selling, where a trader sells shares without borrowing them or confirming delivery by settlement, gets extra scrutiny under Regulation SHO, which requires broker-dealers to locate shares before a short sale and to close out failures to deliver within set timeframes. Selling short and intentionally failing to deliver in order to depress a price is manipulative conduct.³

The Stabilization Exception

Not every attempt to influence a price is prohibited. Section 78i(a)(6) allows price stabilization during a securities offering, subject to SEC rules. When a company issues new stock, the underwriter may place stabilizing bids to keep the share price from dropping below the offering price during distribution.

Regulation M (Rule 104) keeps this exception narrow. Stabilizing bids cannot exceed the offering price, must give priority to independent bids at the same price, and are prohibited in at-the-market offerings. The stabilizer must disclose the bid’s purpose to the exchange and to any purchaser before the transaction closes.⁴ A stabilizing bid that steps outside these limits is manipulation like any other.

The Intent the Government Has to Prove

Section 78i is not a strict-liability statute. What has to be proven depends on the subsection. Most of the prohibited acts in Section 78i(a) require proof of “purpose”: the defendant carried out the trades to create a false impression or to induce others to trade. For matched orders, the standard is “knowledge” that a corresponding order has been or will be placed. For false statements under subsection (a)(4), the person must have known or had reasonable grounds to believe the statement was misleading.⁵

The private-liability provision in Section 78i(f) goes further: only someone who “willfully participates” in a manipulative act can be sued for damages, so plaintiffs must show deliberate conduct, not negligence.⁵ For criminal prosecution under 15 U.S.C. 78ff, the government must prove willfulness beyond a reasonable doubt.

Which Trades the Statute Reaches

Section 78i applies to securities traded on national exchanges and, in some circumstances, over-the-counter. The Securities Exchange Act of 1934 gives the SEC authority over trading on registered exchanges like the New York Stock Exchange and Nasdaq,⁶ and Section 78i covers stocks, bonds, options, and security-based swaps when used to distort prices.¹

The statute does not automatically reach trades on foreign exchanges. In Morrison v. National Australia Bank Ltd. (2010), the Supreme Court held that Section 10(b) applies only to securities listed on domestic exchanges and to transactions in other securities that occur within the United States, replacing older tests based on where the fraud originated or where its effects were felt.⁷ If the trade happened on a U.S. exchange or was otherwise a domestic transaction, U.S. law applies. If not, it generally does not.

Penalties for a Violation

Financial exposure scales with severity. The SEC imposes tiered civil penalties under Section 21(d)(3) of the Exchange Act, with the highest tier reserved for violations involving fraud and substantial investor losses. As of 2025, the top tier reaches $236,451 per violation for individuals and $1,182,251 per violation for entities, adjusted annually for inflation.⁸ On top of penalties, the SEC routinely seeks disgorgement of all profits gained from the manipulation.

Criminal prosecution under 15 U.S.C. 78ff carries up to 20 years in prison and fines up to $5 million for individuals or $25 million for entities. Separate securities fraud provisions under Sarbanes-Oxley can push the maximum sentence to 25 years in certain cases. Sentencing turns on the financial harm caused, the defendant’s role, and whether the conduct was part of a wider conspiracy. In SEC v. Milrud, a trader who ran a cross-border manipulation scheme using recruited traders in China and Korea pleaded guilty and received five years of probation with forfeiture of $285,000.⁹

Suing as an Injured Investor

Section 78i(f) gives injured investors an express private right of action. Anyone who bought or sold a security at a price affected by a willful violation of the statute can sue for damages, and this is one of the rare places in securities law where Congress created the right to sue directly, as opposed to Section 10(b), where courts implied it.⁵ Damages are generally the difference between the price the plaintiff paid or received and what the price would have been absent the manipulation. Courts have discretion to award reasonable attorneys’ fees to either side.

Most private securities fraud litigation still proceeds under Section 10(b) and SEC Rule 10b-5, which cover a broader range of deceptive conduct. In Basic Inc. v. Levinson (1988), the Supreme Court established the fraud-on-the-market theory, which presumes investors in an efficient market relied on the integrity of the market price. The presumption is rebuttable but spares plaintiffs from proving they personally read and relied on specific misrepresentations.¹⁰

Proving you overpaid is not enough. In Dura Pharmaceuticals, Inc. v. Broudo (2005), the Supreme Court held that an inflated purchase price alone does not establish the economic loss required for a securities fraud claim. Plaintiffs have to show the manipulation proximately caused their actual financial loss, typically by pointing to a price drop after the truth emerged.¹¹ Many private claims fall apart here. If the stock fell for unrelated reasons, or the plaintiff sold at a profit before the truth came out, loss causation is hard to establish.

Deadlines to File

Private plaintiffs suing under Section 78i(f) must file within one year after discovering the facts behind the violation and no later than three years after the violation itself.⁵ The one-year clock starts when you knew or reasonably should have known about the manipulation. The three-year outer limit is absolute.

SEC enforcement actions for civil penalties and disgorgement are subject to a five-year statute of limitations under 28 U.S.C. 2462, running from when the claim accrued.¹² Criminal prosecutions generally follow the same five-year window, though certain circumstances can extend it. Miss these deadlines and the claim is gone regardless of the evidence.

Reporting a Violation as a Whistleblower

The Dodd-Frank Act created financial incentives for reporting securities violations. Under 15 U.S.C. 78u-6, anyone who provides original information to the SEC that leads to a successful enforcement action with more than $1 million in monetary sanctions is eligible for an award of 10 to 30 percent of the amount collected.¹³

Employers cannot retaliate. No employer may fire, demote, suspend, harass, or otherwise discriminate against a whistleblower for reporting to the SEC, assisting in an investigation, or making disclosures protected under Sarbanes-Oxley. A retaliated-against employee can sue in federal court within six years of the retaliatory act (or three years of discovering the material facts, whichever is earlier), with an absolute outer limit of ten years. Remedies include reinstatement, double back pay with interest, and reimbursement of litigation costs and attorneys’ fees.¹³

1
Office of the Law Revision Counsel. 15 USC 78i – Manipulation of Security Prices
2
United States Department of Justice. High-Frequency Trader Sentenced to Three Years in Prison for Disrupting Futures Market in First Federal Prosecution of Spoofing
3
U.S. Securities and Exchange Commission. Key Points About Regulation SHO
4
eCFR. 17 CFR 242.104 – Stabilizing and Other Activities in Connection With an Offering
5
Office of the Law Revision Counsel. 15 US Code 78i – Manipulation of Security Prices
6
Legal Information Institute (LII). Securities Exchange Act of 1934
7
Justia U.S. Supreme Court Center. Morrison v National Australia Bank Ltd, 561 US 247
8
Securities and Exchange Commission. Adjustments to Civil Monetary Penalty Amounts
9
U.S. Securities and Exchange Commission. SEC Obtains Final Judgment Against Canadian Man Charged With Conducting Fraudulent Trading Scheme
10
Oyez. Basic Inc v Levinson
11
Justia U.S. Supreme Court Center. Dura Pharmaceuticals Inc v Broudo
12
Office of the Law Revision Counsel. 28 US Code 2462 – Time for Commencing Proceedings
13
Office of the Law Revision Counsel. 15 US Code 78u-6 – Securities Whistleblower Incentives and Protection