Insider trading
Insider trading is dealing in securities on material non-public information in breach of a duty of trust or confidence, which exploits a true signal others cannot see rather than injecting a false one into the price.
Where is the line between insider trading and market manipulation?
The line is what the conduct does to the price signal.
Market manipulation puts something false into price formation. A spoofed order says there is demand that does not exist. A wash trade says a transaction occurred between parties who never took risk. A rigged benchmark reports a rate nobody would pay. In each case the price that emerges describes a market that is not there.
Insider trading puts nothing false into the price. The insider trades on information that is entirely true, and their trading moves the price toward what it will be once the information is public. The wrong is not falsification. It is that the information was obtained and used in breach of a duty — to an employer, a client, a source, or a family member.
That difference has practical consequences that go beyond taxonomy.
Manipulation harms everyone reading the price, because the price itself is corrupted. Insider trading harms the specific counterparty who traded on the other side, and harms confidence more broadly, but the price it produces is closer to correct than the one that preceded it. Some economists have argued from this that insider trading improves price efficiency. The legal system has consistently answered that efficient prices obtained by breach of duty are not a defence, and that a market whose participants are advantaged by position rather than by analysis is one people reasonably decline to enter.
What does the law actually prohibit?
There is no US statute that says “insider trading is unlawful.” The prohibition is built from Exchange Act § 10(b) and Rule 10b-5 — the general antifraud provisions — as interpreted over decades of case law, with Rules 10b5-1 and 10b5-2 codifying parts of the result.
Three elements must be present.
Material. A reasonable investor would consider the information important in deciding whether to buy or sell. There is no percentage threshold, and courts have rejected attempts to create one.
Non-public. Not yet disseminated to the market. Information available to anyone who cares to assemble it is public even if nobody has assembled it — which is the basis of the mosaic theory, under which an analyst may combine many immaterial public facts into a material conclusion and trade on it lawfully.
Breach of duty. This is the element that does the real work. Two theories cover it. The classical theory reaches corporate insiders trading in their own company’s stock, who owe a duty to shareholders. The misappropriation theory reaches people who owe a duty to the source of the information rather than to the counterparty — lawyers, bankers, consultants, printers, and, under Rule 10b5-2, family members in defined circumstances.
Where information is passed on, the tipper must have received a personal benefit for liability to attach to either party. The benefit need not be money; a gift of information to a trading friend or relative can suffice. The precise boundaries of that principle have been litigated extensively and are not fully settled.
Regulation FD sits alongside as a disclosure rule rather than a fraud rule: it requires that material information disclosed selectively to market professionals be disclosed publicly.
| Provision | Citation | Primary text |
|---|---|---|
| Securities Exchange Act — general antifraud | 15 U.S.C. § 78j(b) | Read the text |
| SEC Rule 10b-5 | 17 C.F.R. § 240.10b-5 | Read the text |
| SEC Rule 10b5-1 — trading on the basis of material non-public information | 17 C.F.R. § 240.10b5-1 | Read the text |
| SEC Rule 10b5-2 — duties of trust or confidence | 17 C.F.R. § 240.10b5-2 | Read the text |
| Regulation FD — fair disclosure | 17 C.F.R. Part 243 | Read the text |
Which real enforcement actions have alleged insider trading?
This library holds 608 enforcement actions tagged insider trading. The table shows the largest by civil penalty together with the most recently filed. Every row links to a page carrying the regulator's own release and, where one was published, the complaint.
| Action | Agency | Filed | Penalty | Status |
|---|---|---|---|---|
| CFTC v. HSBC Bank USA (cash vs derivatives schemes, 2023) | CFTC | 2023-11-07 | $1.7bn | filed |
| CFTC v. Freepoint Commodities LLC (insider trading, 2023) | CFTC | 2023-12-14 | $91m | judgment |
| CFTC v. Trafigura (insider trading, 2024) | CFTC | 2024-06-17 | $55m | judgment |
| CFTC v. unnamed respondents (cash vs derivatives schemes, 2022) | CFTC | 2022-10-20 | $41m | judgment |
| SEC v. Shaohua (Michael) Yin, et al. (insider trading, 2024) | SEC | 2024-08-30 | $39.5m | judgment |
| SEC v. Trijya Vakil and Neeraj Visen (insider trading, 2026) | SEC | 2026-09-04 | — | judgment |
| CFTC v. Gabriel Perez (insider trading, 2026) | CFTC | 2026-08-28 | $65k | judgment |
| SEC v. Gavin Wolfe and others (insider trading, 2026) | SEC | 2026-08-21 | — | unknown |
How does it get detected?
Detection begins with the announcement rather than with the trade. When a material corporate event is announced, surveillance systems look backwards at trading in the preceding window and ask which accounts took positions that now look prescient.
The statistical filter produces many false positives — someone is always lucky — so the second stage is relational. Investigators map connections between the flagged accounts and people with access to the information: employment records, phone and message records, travel, shared addresses, club and family relationships. A cluster of otherwise unconnected accounts that all trade the same name in the same window, and that all connect to one law firm or one consultant, is the pattern that turns a filter hit into a case.
Options markets are disproportionately productive here, because short-dated out-of-the-money options offer the most leverage on a known event, and buying them is highly out of character for most accounts.
- Trading concentrated immediately before a scheduled or unscheduled corporate announcement.
- Out-of-character positions — first-ever option purchases, or size far beyond an account's history.
- Communication links between traders and people with access, established from phone, message and travel records.
- Clusters of accounts trading the same name in the same window with no other relationship to it.
- Trading in a name by someone with no prior interest in the sector, followed by an announcement in it.
What penalties does insider trading actually attract?
The numbers below are computed from this site's own case records at build time, not quoted from a secondary source. They change whenever a new action is added to the library.
- Actions recorded
- 608
- Median penalty
- $100k
- Largest penalty
- $1.7bn
- Criminal parallel
- 36%
- Median sentence
- 2y 3m
What are the red flags?
- A concentrated, short-dated option position taken shortly before an announcement, in an account that has never traded options.
- Trading by people connected to a deal's advisers rather than to the company itself.
- A pattern of profitable pre-announcement trades across unrelated companies sharing one adviser.
Why this page exists on a manipulation site
Because the two are constantly conflated, including by people who ought to distinguish them. Headlines describe insider trading as manipulation; commentators describe manipulation as insider trading; and both appear in the same enforcement releases, which is why this library’s case records carry both tags and keep them separate.
If you take one distinction away: manipulation lies to the market about what is happening; insider trading keeps a truth from the market that it is entitled to have. Both are fraud. Only one corrupts the price.
Frequently asked questions about insider trading
- Is insider trading a form of market manipulation?
- No, and the distinction matters. Manipulation injects a false signal into price formation. Insider trading exploits a true signal that has not yet been disclosed. Both are securities fraud, both distort markets, but only manipulation falsifies the price itself.
- Is trading on non-public information always illegal?
- No. The information must be material, non-public, and used in breach of a duty of trust or confidence. An analyst who assembles an accurate picture from many non-material public sources — the mosaic theory — breaches nothing.
- What is the misappropriation theory?
- It holds that trading on confidential information in breach of a duty owed to its source is fraud, even where no duty is owed to the people on the other side of the trade. It is how lawyers, printers, consultants and family members are reached.
- What makes information material?
- Whether a reasonable investor would consider it important in deciding to buy or sell. There is no percentage threshold; materiality is assessed on the total mix of information available, and courts have rejected bright-line tests.
- What is a Rule 10b5-1 plan?
- A written plan adopted while not in possession of material non-public information, specifying future trades. It provides an affirmative defence. Amendments in recent years added cooling-off periods and disclosure requirements after evidence that plans were being used opportunistically.
- Does the tipper have to profit?
- The tipper must receive a personal benefit for tipper-tippee liability to attach, but the benefit need not be money. Gifting information to a trading friend or relative can suffice, and the scope of that principle has been litigated repeatedly.
- Does insider trading law apply to crypto?
- Where the asset is a security, yes, directly. Where it is not, the securities provisions do not apply, and cases have instead been charged as wire fraud — most visibly in matters involving employees trading ahead of exchange listing announcements.
- How is it detected?
- Surveillance flags anomalous pre-announcement trading, then investigators build a relationship map between the accounts and people with access. FINRA and the exchanges run this routinely on every significant corporate announcement.
- Is it a victimless offence?
- No, though the harm is diffuse. The counterparty sold at a price that did not reflect information the buyer held. The broader damage is to willingness to participate in a market where some participants are systematically better informed by position rather than by effort.
- Why is it covered on a market manipulation site at all?
- Because it is constantly conflated with manipulation, in headlines and in ordinary conversation. Drawing the line precisely is the point of including it, and the same enforcement records contain both.
What techniques are related to insider trading?
Terms defined on this page
Sources
- SEC Rule 10b5-1 — Electronic Code of Federal Regulations
- SEC Rule 10b5-2 — Electronic Code of Federal Regulations
- Regulation FD — Electronic Code of Federal Regulations
- Securities Exchange Act § 10 — Cornell Legal Information Institute