# MNPI: What Material Non-Public Information Is and Why It Puts You at Legal Risk Published: 2026-01-23 Author: Warren Team URL: https://www.heywarren.com/blog/mnpi --- A hedge fund manager learns from a friend at a biotech company that an FDA approval is coming next week — before the public announcement. He buys call options. The stock surges 40% on the announcement. He profits millions. Then the SEC calls. This scenario plays out with alarming regularity, and the participants are often intelligent, accomplished people who either didn't know where the legal line was or convinced themselves they weren't crossing it. Understanding MNPI — material non-public information — and the laws governing its use is essential for anyone in finance, corporate governance, or investing. This guide explains exactly what MNPI is, how insider trading law works, and how to protect yourself. ## What Is MNPI? **MNPI** stands for **Material Non-Public Information**. It refers to information about a company that is: ![Information must be both material and non-public to qualify as MNPI — either condition alone is insufficient.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20600%20211%22%20width%3D%22600%22%20height%3D%22211%22%20role%3D%22img%22%3E%3Ctitle%3EHierarchy%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Crect%20x%3D%22220%22%20y%3D%2220%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22%232563eb%22%2F%3E%3Ctext%20x%3D%22300%22%20y%3D%2254%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22700%22%20fill%3D%22white%22%3EMNPI%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20120%20105.5%20L%20120%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%2240%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22120%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EMaterial%3C%2Ftext%3E%3Ctext%20x%3D%22120%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EAffects%20stock%20price%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20300%20105.5%20L%20300%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22220%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22300%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ENon-Public%3C%2Ftext%3E%3Ctext%20x%3D%22300%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3ENot%20yet%20disclosed%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20480%20105.5%20L%20480%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22400%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22480%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EBoth%20Required%3C%2Ftext%3E%3Ctext%20x%3D%22480%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EMust%20meet%20both%20tests%3C%2Ftext%3E%3C%2Fsvg%3E) *Information must be both material and non-public to qualify as MNPI — either condition alone is insufficient.* 1. **Material**: Likely to have a significant effect on the company's stock price or would be considered important by a reasonable investor in making an investment decision 2. **Non-public**: Not yet disclosed to the general public through regulatory filings, press releases, or other broad dissemination Both conditions must be met. Information that is material but already public is not MNPI. Information that is non-public but not material (such as minor operational details) is also not MNPI. ### What Makes Information "Material"? Courts and the SEC have developed a standard: information is material if there is a "substantial likelihood that a reasonable investor would consider it important" in making an investment decision. This is a facts-and-circumstances analysis, but common examples include: **Almost always material**: - Quarterly earnings before release (especially if materially different from consensus) - Pending mergers, [acquisitions](/blog/what-is-acquisitions), or takeovers - Major contract wins or losses - FDA drug approval or rejection - Significant regulatory actions - CEO or CFO changes - Major litigation outcomes (settlements, verdicts) - Bankruptcy or financial distress - Material restatements of financial results **Sometimes material** (depends on magnitude): - Changes in key personnel below C-suite - New product launches - Changes in dividend policy - Major capital raises **Generally not material** (unless unusually significant): - Routine business developments within normal operations - Minor contract awards within normal business - Operational details of no investor significance ### What Makes Information "Non-Public"? Information is non-public until it has been effectively disseminated to the investing public through a channel that provides broad, non-exclusionary access. Under SEC Regulation FD (Fair Disclosure) and related rules, public disclosure typically means: - SEC filings (10-Q, 10-K, 8-K, press release filed via Form 8-K) - Press releases distributed through major wire services - Conference calls open to the public (earnings calls, investor days) - Company website disclosure simultaneous with any selective disclosure **Important**: A tip from a friend at the company does not make information public. A rumor circulating on Reddit is not "public" in the legal sense if it hasn't been confirmed by the company. A Wall Street Journal article disclosing information makes it public from the time of publication. ## The Law: Insider Trading and MNPI ### Section 10(b) and Rule 10b-5 ![Both the tipper and tippee face criminal and civil liability when MNPI flows from an insider to a trader.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%201090%20125%22%20width%3D%221090%22%20height%3D%22125%22%20role%3D%22img%22%3E%3Ctitle%3EFlow%20diagram%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Crect%20x%3D%2230%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22115%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ECorporate%20Insider%3C%2Ftext%3E%3Ctext%20x%3D%22115%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3EHas%20MNPI%3C%2Ftext%3E%3Cline%20x1%3D%22205%22%20y1%3D%2262.5%22%20x2%3D%22237%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22244%2C62.5%20235%2C57.5%20235%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22245%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22330%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ETipper%3C%2Ftext%3E%3Ctext%20x%3D%22330%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3EShares%20for%20benefit%3C%2Ftext%3E%3Cline%20x1%3D%22420%22%20y1%3D%2262.5%22%20x2%3D%22452%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22459%2C62.5%20450%2C57.5%20450%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22460%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22545%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ETippee%3C%2Ftext%3E%3Ctext%20x%3D%22545%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3EReceives%20tip%3C%2Ftext%3E%3Cline%20x1%3D%22635%22%20y1%3D%2262.5%22%20x2%3D%22667%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22674%2C62.5%20665%2C57.5%20665%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22675%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22760%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ETrade%20Executed%3C%2Ftext%3E%3Ctext%20x%3D%22760%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3EOn%20MNPI%3C%2Ftext%3E%3Cline%20x1%3D%22850%22%20y1%3D%2262.5%22%20x2%3D%22882%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22889%2C62.5%20880%2C57.5%20880%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22890%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22975%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ESEC%20Liability%3C%2Ftext%3E%3Ctext%20x%3D%22975%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3EBoth%20parties%3C%2Ftext%3E%3C%2Fsvg%3E) *Both the tipper and tippee face criminal and civil [liability](/blog/examples-liabilities) when MNPI flows from an insider to a trader.* The primary federal securities fraud statute — Section 10(b) of the Securities Exchange Act of 1934 and SEC Rule 10b-5 — prohibits any "manipulative or deceptive device" in connection with the purchase or sale of securities. Trading on MNPI is prosecuted as a form of securities fraud under this provision. ### The Theories of Insider Trading Liability **Classical theory (traditional insiders)**: Corporate insiders — executives, directors, employees — who trade on material non-public information obtained through their position breach a fiduciary duty to shareholders and violate securities law. **Misappropriation theory**: Even outsiders can be liable for insider trading if they trade on MNPI that was misappropriated (used in breach of a duty of trust and confidence) from a source to whom they owe a duty. This covers: - Lawyers, accountants, investment bankers, and others who receive confidential information professionally - Friends and family members who receive tips from insiders - Anyone who breaches a confidentiality agreement **Tipping liability**: Under the Supreme Court's *Dirks v. SEC* (1983) and *Salman v. United States* (2016) framework, a **tipper** who passes MNPI to a **tippee** may be liable if: - The tipper received a personal benefit from the tip (including the intangible benefit of gifting information to a friend or family member) - The tippee knew or should have known the information was improperly disclosed Both the tipper and tippee can face criminal and civil liability. ## MNPI in Practice: Common Scenarios and Risk Areas ### Investment Banking and M&A Investment bankers routinely work with highly material non-public information — deal terms, potential acquisitions, financing details. They are subject to strict information barriers ("Chinese walls") separating their advisory teams from trading desks. Violations of these barriers have led to some of the largest insider trading prosecutions in history. ### Corporate Executives and "Trading Plans" Corporate insiders who want to sell their own company's stock use **Rule 10b5-1 trading plans** — pre-established plans entered when not in possession of MNPI that specify in advance when and how many shares will be sold. Trades executed pursuant to a valid 10b5-1 plan provide an affirmative defense to insider trading claims. **Recent SEC reforms** (effective 2023) tightened 10b5-1 plan rules, adding cooling-off periods (90-120 days for executives) and requiring single-trade plans to include representations that the insider wasn't in possession of MNPI at plan adoption. ### Expert Networks and Research Financial research firms often use "expert networks" to connect fund managers with industry experts, including former employees of public companies. This practice is legal — the problem arises when experts share MNPI obtained from current employment or confidential sources. Several high-profile expert network prosecutions (the Galleon Group case, SAC Capital investigations) resulted in billions in penalties and prison sentences. ### Channel Checks and Mosaic Theory Fund managers and analysts conduct "channel checks" — talking to suppliers, customers, distributors, and competitors to build an understanding of a company's performance. This is generally legal under the **mosaic theory**: combining multiple pieces of non-material, public or legally obtained information to reach an investment conclusion is legal, even if the conclusion would be surprising to the market. The key: each individual piece of information must be non-material and properly obtained. If one piece of the mosaic is MNPI, the entire trading thesis may be tainted. ### Social Media and Information Leaks Modern MNPI issues increasingly arise on social media, messaging apps, and online forums. A company employee posting unannounced financial results on Reddit or sharing deal information via WhatsApp may create MNPI situations for anyone who trades on that information. ## Regulation FD: Public Company Obligations **SEC Regulation Fair Disclosure (Regulation FD)** prohibits public companies from selectively disclosing material information to certain investors or analysts without simultaneously making it available to the public. **Practical implications for companies**: - Cannot brief analysts on upcoming earnings before the public call - Must file an 8-K if material information is inadvertently disclosed privately - Earnings calls must be open to the public - Private meetings with investors are permitted but any material information shared must be simultaneously public Regulation FD applies to the company itself — individual investors who receive selectively disclosed information may also face MNPI liability under the tipping theories above. ## Penalties for Trading on MNPI **Criminal penalties**: Up to 20 years in prison and $5 million per violation for individuals. Up to $25 million per violation for entities. **Civil penalties**: The SEC can seek disgorgement of profits plus a penalty of up to three times the gain or loss avoided. Even profitable trades of modest size can result in penalties of millions of dollars when trebled. **Reputational consequences**: Even individuals who avoid criminal prosecution may face SEC civil actions, industry bars, and career-ending reputational damage. **Notable enforcement**: The Galleon Group prosecutions resulted in Raj Rajaratnam's 11-year prison sentence — then the longest for insider trading. SAC Capital paid $1.8 billion in penalties. Numerous hedge fund managers, analysts, and corporate insiders have faced career-ending enforcement actions. ## How to Protect Yourself: Practical MNPI Compliance ### If You're a Corporate Insider ![A valid Rule 10b5-1 trading plan requires adoption before any MNPI is possessed, followed by a mandatory cooling-off period.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20800%20149%22%20width%3D%22800%22%20height%3D%22149%22%20role%3D%22img%22%3E%3Ctitle%3ETimeline%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Cline%20x1%3D%22120%22%20y1%3D%2255%22%20x2%3D%22680%22%20y2%3D%2255%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%223%22%2F%3E%3Ccircle%20cx%3D%22120%22%20cy%3D%2255%22%20r%3D%2224%22%20fill%3D%22white%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22120%22%20y%3D%2260%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2215%22%20font-weight%3D%22700%22%20fill%3D%22%230f172a%22%3E1%3C%2Ftext%3E%3Ctext%20x%3D%22120%22%20y%3D%22101%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2212%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ENo%20MNPI%3C%2Ftext%3E%3Ctext%20x%3D%22120%22%20y%3D%22119%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EClean%20window%3C%2Ftext%3E%3Ccircle%20cx%3D%22260%22%20cy%3D%2255%22%20r%3D%2224%22%20fill%3D%22%232563eb%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%223%22%2F%3E%3Ctext%20x%3D%22260%22%20y%3D%2260%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2215%22%20font-weight%3D%22700%22%20fill%3D%22white%22%3E2%3C%2Ftext%3E%3Ctext%20x%3D%22260%22%20y%3D%22101%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2212%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EAdopt%20Plan%3C%2Ftext%3E%3Ctext%20x%3D%22260%22%20y%3D%22119%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EPre-specify%20trades%3C%2Ftext%3E%3Ccircle%20cx%3D%22400%22%20cy%3D%2255%22%20r%3D%2224%22%20fill%3D%22white%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22400%22%20y%3D%2260%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2215%22%20font-weight%3D%22700%22%20fill%3D%22%230f172a%22%3E3%3C%2Ftext%3E%3Ctext%20x%3D%22400%22%20y%3D%22101%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2212%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ECool-off%3C%2Ftext%3E%3Ctext%20x%3D%22400%22%20y%3D%22119%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3E90-120%20days%3C%2Ftext%3E%3Ccircle%20cx%3D%22540%22%20cy%3D%2255%22%20r%3D%2224%22%20fill%3D%22white%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22540%22%20y%3D%2260%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2215%22%20font-weight%3D%22700%22%20fill%3D%22%230f172a%22%3E4%3C%2Ftext%3E%3Ctext%20x%3D%22540%22%20y%3D%22101%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2212%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EExecute%20Trades%3C%2Ftext%3E%3Ctext%20x%3D%22540%22%20y%3D%22119%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EAutomatic%3C%2Ftext%3E%3Ccircle%20cx%3D%22680%22%20cy%3D%2255%22%20r%3D%2224%22%20fill%3D%22white%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22680%22%20y%3D%2260%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2215%22%20font-weight%3D%22700%22%20fill%3D%22%230f172a%22%3E5%3C%2Ftext%3E%3Ctext%20x%3D%22680%22%20y%3D%22101%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2212%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EAffirmative%20Defense%3C%2Ftext%3E%3Ctext%20x%3D%22680%22%20y%3D%22119%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EIf%20plan%20valid%3C%2Ftext%3E%3C%2Fsvg%3E) *A valid Rule 10b5-1 trading plan requires adoption before any MNPI is possessed, followed by a mandatory cooling-off period.* 1. Know your company's trading window policies — only trade during open windows, typically after earnings releases 2. Clear trades with your legal/compliance department if required 3. Adopt a 10b5-1 plan for planned dispositions 4. Never trade on information you received through your work role that isn't yet public ### If You're an Investor or Fund Manager 1. Maintain robust information barriers within your organization 2. Document the basis for investment decisions — don't rely solely on non-public information even if received inadvertently 3. If you receive information that might be MNPI, consult legal counsel before trading 4. "I didn't know it was MNPI" is not a defense — the standard is whether a reasonable investor would consider the information important ### If You're Given a "Hot Tip" The clearest test: **ask yourself if the person sharing this information was supposed to share it.** If a friend tells you their company is about to announce a merger, ask: are they authorized to tell me this? If the answer is no — or if you have any doubt — don't trade until the information is publicly announced. ## Authoritative Sources For deeper background and primary-source data on this topic, the following authoritative sources are useful starting points: - [IRS](https://www.irs.gov/) - [SEC](https://www.sec.gov/) - [Federal Reserve](https://www.federalreserve.gov/) ## Conclusion MNPI — material non-public information — is the foundation of insider trading law, and understanding it is essential for anyone who participates in financial markets. The rules aren't limited to obvious corporate insiders; they extend to anyone who trades on the basis of confidential material information obtained through any relationship of trust or confidence. The legal framework has become increasingly sophisticated, and enforcement has become more aggressive. The cost of getting it wrong — in financial penalties, career consequences, and potential imprisonment — far exceeds any possible trading gain. Ready to put this knowledge to work? Try Warren, your AI financial advisor — get personalized, conflict-free guidance at heywarren.com --- ## Related Reading **More from Warren**: - [Management Buyout (MBO): How It Works, Why It Happens, and What It Means for Investors](/blog/management-buyout) - [Corporate Debt Restructuring Meaning: How Companies Renegotiate Debt to Survive Financial Distress](/blog/corporate-debt-restructuring-meaning) - [Horizontal Mergers and Acquisitions: Strategy, Benefits, Antitrust Risk, and Real-World Examples](/blog/horizontal-mergers-and-acquisitions) **Authoritative sources**: - [SEC — Mergers & Acquisitions](https://www.sec.gov/fast-answers/answersmergershtm.html) - [SEC EDGAR — Company Filings](https://www.sec.gov/edgar/searchedgar/companysearch) - [Federal Trade Commission — Premerger Notification](https://www.ftc.gov/enforcement/premerger-notification-program)