Ethics
Material Non-Public Information: Meaning, Examples, and Why It Matters in Finance
If you have ever wondered why a fund manager who just had lunch with a company’s CFO cannot go back to his desk and immediately buy that company’s stock, you already understand the problem that material non-public information rules are designed to solve.
The answer has nothing to do with politeness. It has everything to do with fairness, market integrity, and one of the most fundamental principles in securities law and professional ethics.
What is Material Non-Public Information?
Material non-public information, commonly referred to as MNPI, is any information about a company or security that meets two conditions at the same time.
The first condition is that the information is material. This means it is significant enough that a reasonable investor would consider it important when making a decision to buy, sell, or hold a security. If the information would move the price of the stock once it became public, it is almost certainly material.
The second condition is that the information is non-public. This means it has not been disclosed to the general investing public through official channels. It is known only to a limited group of people, typically insiders or those who have received it through a relationship of trust or confidence.
Both conditions must be present together. Information that is material but already public is fine to trade on. Information that is non-public but completely trivial is not a concern. It is the combination of both that creates the problem.
What Makes Information Material?
This is where judgment comes in, and where a lot of the complexity in real-world situations lives.
The standard test used across most regulatory frameworks and in the CFA Institute’s Code of Ethics is the reasonable investor test. Would a reasonable investor consider this information important in making an investment decision? If yes, it is material.
Some categories of information are almost always material. Earnings announcements before they are released publicly are material. A merger or acquisition that has not been announced is material. A major contract win or loss is material. A regulatory approval or rejection for a pharmaceutical product is material. The sudden resignation of a CEO is material. A significant change in the financial condition of the company is material.
Other situations require more judgment. A single data point from a supplier may or may not be material depending on what it implies about the broader company’s performance. A piece of information that confirms what the market already suspects may have limited materiality if it does not add meaningfully to what is already known.
The key is that you do not need certainty. If there is a reasonable chance that the information would affect an investor’s decision, treat it as material and proceed accordingly.
What Makes Information Non-Public?
Information is non-public if it has not been effectively communicated to the marketplace in a way that gives investors generally a fair opportunity to react to it.
A company filing its quarterly results on the stock exchange is making information public. A press release going out on a wire service is making information public. A CEO speaking at a widely attended industry conference, with the presentation recorded and available, is making information public.
But a private conversation between a sell-side analyst and a company’s investor relations officer is not making information public, even if the analyst writes it down in their notes. A tip passed from a corporate lawyer working on a deal to their spouse is not public information. An overheard conversation in an elevator between two investment bankers is not public information, no matter how many people happened to be in that elevator.
The question is not just whether a few people know it. The question is whether the investing public at large has had a genuine opportunity to receive and react to the information.
A Simple Indian Example
Suppose an analyst at a Mumbai brokerage is attending a routine earnings call with the finance team of a large listed pharmaceutical company. After the formal part of the call ends, the CFO casually mentions that the company has just received informal confirmation from the USFDA that its flagship drug application will be approved next week. The official announcement has not been made. The stock exchange has not been informed. No press release has gone out.
The analyst now knows something that no other market participant knows, and that information, once public, will almost certainly send the stock sharply higher because a USFDA approval is a major value catalyst for any Indian pharma company.
The information is material. A USFDA approval is exactly the kind of event that would cause a reasonable investor to immediately reassess the value of the stock.
The information is non-public. It came through a private conversation and has not been disclosed through any official channel.
If the analyst goes back to their desk and recommends buying the stock to their clients, or if the analyst personally buys the stock before the announcement, they have acted on MNPI. Under SEBI regulations, under the CFA Institute’s Standards of Professional Conduct, and under most securities laws globally, this is a serious violation.
The Mosaic Theory: Where It Gets Interesting
Now here is where things get genuinely nuanced, and where a lot of professional investors spend considerable time thinking carefully about what they can and cannot do.
The mosaic theory says that an analyst can legally and ethically reach a conclusion about a security by combining multiple pieces of information, even if some of those individual pieces are non-public, as long as no single piece of non-public information is itself material.
Think of it like assembling a jigsaw puzzle. Each individual piece on its own tells you very little. But when you put enough pieces together, a clear picture emerges.
Suppose an analyst does the following over the course of a few weeks.
They speak to three suppliers of a listed auto company and learn that order volumes from that company have been running about 15% higher than the same period last year. That information from each supplier is arguably non-public, but on its own, from one supplier, it is not necessarily material.
They attend an industry conference and hear the company’s head of sales speak about demand trends in general terms. That is public.
They analyse satellite images of the company’s factory parking lots and observe that the lots are unusually full at odd hours, suggesting higher-than-normal production activity. That information is publicly observable.
They read through the company’s last three quarterly reports and observe a pattern of conservative guidance that has consistently been beaten.
None of these individual pieces of information is a smoking gun. But when the analyst puts them all together, they form a compelling picture that earnings are likely to beat expectations significantly.
Acting on that synthesised conclusion is generally permitted under mosaic theory. The analyst has done genuine research and reached a non-obvious conclusion through diligence and analytical skill rather than through access to a material non-public tip.
The line gets crossed when one piece of the mosaic is itself material and non-public. If one of those supplier conversations had revealed that the auto company had just won a massive new contract that had not been announced, that single piece would be MNPI, and the entire mosaic built around it becomes tainted.
How MNPI Arises in Practice
MNPI does not always arrive with a warning label attached. In real professional life, it can surface in situations that feel completely routine.
A corporate access meeting arranged by a brokerage where a listed company’s management meets fund managers. If management accidentally reveals something material that goes beyond what has been publicly disclosed, every person in that room has just received MNPI.
Due diligence for a potential transaction. An investment bank working on a merger has access to confidential information about both parties. Every banker on that deal team is sitting on MNPI about multiple listed companies.
Expert networks. Fund managers sometimes pay for access to industry experts who have recently worked at companies being researched. If one of those experts shares information from their time inside the company that has not been publicly disclosed and is material, that is MNPI, regardless of how it was obtained or what the network’s compliance terms say.
Relationship channels. A fund manager who happens to be a personal friend of a company’s founder may receive information casually in a social setting that they would never receive in a formal investor relations context. The social setting does not change the nature of the information.
What Should You Do If You Receive MNPI?
The CFA Institute’s Standards of Professional Conduct are very clear on this. If you receive information that you believe may be material and non-public, you must stop. You do not trade on it. You do not pass it on to colleagues. You do not use it as the basis for a recommendation.
The recommended course of action is to immediately consult with your compliance team and report the situation. Most professional investment firms have information barriers, commonly called Chinese Walls, which are internal procedures designed to prevent MNPI from flowing between different parts of the organisation. For example, the investment banking division working on a merger is physically and systemically separated from the equity research division that covers the same companies.
If you are unsure whether information crosses the line into MNPI territory, the default position should always be to treat it as if it does and seek guidance before acting.
Asking yourself two questions in sequence helps. First, is this information that the company has officially released to the public? If no, move to the second question. Would a reasonable investor consider this important in making an investment decision? If yes, stop and seek compliance guidance before doing anything else.
Penalties and Consequences
The consequences of trading on MNPI are serious across every major jurisdiction.
In India, SEBI’s Prohibition of Insider Trading Regulations, 2015, prohibit any person who is in possession of unpublished price sensitive information from trading in the securities to which that information relates. The penalties include disgorgement of profits, fines of up to three times the profits made or losses avoided, and criminal prosecution.
Under the CFA Institute’s Standards of Professional Conduct, Standard II(A) covers material non-public information explicitly. A violation can result in suspension or permanent revocation of the CFA charter, which effectively ends a career in professional investment management.
In the United States, the Securities and Exchange Commission has pursued insider trading cases resulting in prison sentences, multimillion-dollar fines, and lifetime bans from the securities industry.
The common thread across all of these is that regulators view MNPI violations as an attack on the foundational fairness of capital markets. If some participants can trade on information that others cannot access, the market stops being a level playing field, investor confidence erodes, and the cost of capital for companies rises because investors demand a higher premium for participating in a market they perceive as rigged against them.
MNPI and the CFA Code of Ethics
For CFA candidates and charterholders, Standard II(A) of the Standards of Professional Conduct is the directly relevant standard.
It states that members and candidates who possess material non-public information that could affect the value of an investment must not act or cause others to act on the information.
A few important nuances from the standard are worth remembering.
The prohibition extends beyond trading for your own account. You cannot cause others to act on MNPI either. Passing the information to a colleague, a client, or a friend who then trades on it is a violation even if you personally never bought or sold a single share.
The standard applies to all members and candidates regardless of their role. It covers portfolio managers, analysts, investment bankers, compliance officers, and anyone else who holds the CFA designation or is a CFA candidate.
Firms are encouraged to establish information barriers and maintain restricted lists of securities that employees cannot trade when the firm possesses MNPI about those companies.
MNPI vs. Market Manipulation: A Quick Distinction
These two concepts sometimes get confused but they are distinct violations.
MNPI violations involve trading on information advantages that other market participants do not have. The harm is informational unfairness.
Market manipulation involves taking actions designed to artificially move the price of a security through false or misleading means. The harm is price distortion through deception.
A person who buys stock based on a tip about an unannounced merger is committing an MNPI violation. A person who spreads a false rumour that the same company is about to receive a takeover bid in order to push the stock price up and then sell into the rally is committing market manipulation.
Both are serious violations. Both undermine market integrity. But they arise from different actions and are treated as distinct offences under most regulatory frameworks.
| Basis | MNPI Violation | Market Manipulation |
| What it involves | Trading on an information advantage | Artificially moving prices through deception |
| The harm caused | Informational unfairness | Price distortion |
| How it happens | Acting on a private tip or privileged access | Spreading false rumours or creating artificial trades |
| Example | Buying stock before an unannounced merger | Spreading fake acquisition news to inflate the price |
Exam Perspective
For CFA and finance students, keep these points clearly in mind.
MNPI is information that is both material and non-public. Both conditions must be present together.
The reasonable investor test determines materiality. If a reasonable investor would consider the information important in making an investment decision, it is material.
Under mosaic theory, combining multiple pieces of information including some that are individually non-public but not material is permitted. The analysis becomes prohibited only when a material non-public piece forms part of the mosaic.
Standard II(A) of the CFA Institute’s Standards of Professional Conduct prohibits acting on or causing others to act on MNPI.
Information barriers within firms are the primary structural mechanism for preventing MNPI from flowing between departments with different information access.
In India, SEBI’s Prohibition of Insider Trading Regulations, 2015, are the governing framework. Unpublished price sensitive information is the Indian regulatory equivalent of MNPI.
When in doubt about whether information is MNPI, do not trade. Consult compliance first.
Final Thoughts
Material non-public information sits at the heart of what it means to operate with integrity in financial markets.
The rule itself is not complicated. If you know something that the rest of the market does not know, and that something is important enough to move prices, you cannot trade on it. You cannot pass it on. You have to sit on it until it becomes public information, and only then can you act.
What makes it hard in practice is that financial professionals are constantly swimming in information. Conversations happen, relationships exist, data flows in from dozens of sources simultaneously. The line between legitimate research and impermissible MNPI can sometimes feel blurry in the middle of a fast-moving situation.
That is exactly why the standard is set at the level of reasonable suspicion rather than certainty. You do not have to be sure something is MNPI before stopping. If you reasonably suspect it might be, that is enough reason to stop and seek guidance.
Markets work because participants trust that the rules apply equally to everyone. The moment some participants gain systematic informational advantages over others, that trust breaks down. MNPI rules exist to protect something that is genuinely worth protecting: the belief that when you buy or sell a security, you are competing on a field that is at least reasonably fair.
That belief is more fragile than most people realise. And it is worth more than any single trade.
