What it means
Two tests define it. The information must be material, meaning a reasonable investor would consider it important when deciding to buy or sell, and it must be non-public, meaning it has not been released through a channel that reaches the market as a whole.
Typical examples are unremarkable in themselves: a pending acquisition, a large contract about to be signed or lost, results that will miss guidance, a regulatory approval, the departure of a chief executive, or a discovery that a major product is defective. What makes them dangerous is timing, because each one becomes ordinary public information the moment it is announced.
The rules reach much further than executives. Anyone who receives the information in the course of their work can be an insider, which includes lawyers, auditors, printers, IT contractors, PR agencies and, in most jurisdictions, their families and friends who receive a tip.
Passing information on is treated as seriously as trading. The person who tips is liable even if they never buy a single share, and the recipient is liable if they knew or should have known the information came from a confidential source.
Companies manage the risk with structure rather than trust. Insider lists record who holds price-sensitive information and from when, closed periods block trading in the weeks before results, and pre-clearance procedures require staff to obtain sign-off before dealing in their employer's shares.
The nuance worth knowing is that possessing insider information is not itself wrong. Directors and advisers hold it constantly as part of doing their jobs; the offence is trading on it, tipping it or misusing it, and the correct response to holding it is simply to sit still until it is public.
In practice
Real-world examples.
Example
A finance manager at a listed engineering group prepares the board pack showing that quarterly results will fall 30% short of the guidance the market expects. She sells her shareholding two days before the announcement and avoids a loss of $18,000. The trade is flagged by exchange surveillance, and she faces dismissal, disgorgement of the avoided loss and a regulatory penalty.
Example
A partner at a law firm working on a confidential takeover mentions at a family dinner that his client will be "very busy next month" and names the target. His brother-in-law buys shares in the target and profits when the bid is announced. Both men are liable, the tipper for passing the information and the recipient for trading on it.
Example
A listed retailer imposes a closed period from the end of each quarter until results are published. A regional director who wants to sell shares to fund a house purchase must wait until the window opens and obtain written pre-clearance from the company secretary, even though he has no knowledge of anything price-sensitive.
Case study
Seen in the real world.
This is an illustrative, fictional scenario, and no real company or person is described. Larkfield Biotech, an invented listed pharmaceutical developer, was awaiting a regulatory decision on its lead treatment. The outcome was expected to move the share price violently in one direction or the other, and roughly forty people inside the company and its advisers knew the decision date.
The regulator informed the company on a Thursday afternoon that the treatment had been approved. The announcement was scheduled for Monday morning to allow translation and distribution across three markets. Over the weekend, a junior analyst at the company's investor relations agency told two university friends, who between them bought shares worth $46,000 on Monday's pre-market and sold into the announcement spike for a combined profit of about $71,000.
The pattern was obvious to surveillance systems: two accounts with no prior holdings in the sector, both buying an illiquid stock within an hour of each other, hours before a major announcement. All three faced prosecution, the agency lost the account, and Larkfield had to explain to its board why the insider list had not included agency staff. The illustrative point is that the profit was trivial compared with the consequences, and the control failure was administrative rather than criminal in origin.
Watch out
Common mistakes.
- Believing the rules only apply to directors and senior executives. Anyone who comes into possession of material non-public information through their work is an insider, including junior staff, contractors and external advisers.
- Assuming that not trading personally makes you safe. Tipping someone else is an offence in its own right, whether or not you receive any benefit from their trade.
- Treating small trades as too minor to notice. Exchange surveillance systems screen for unusual patterns rather than for size, and a $5,000 trade in a thinly traded stock ahead of an announcement stands out clearly.
Questions
People also ask.
What counts as "public" for these purposes?
Information becomes public once it has been released through a recognised regulatory or news distribution channel and the market has had time to absorb it, not when it has merely circulated as gossip.
Can I trade in my employer's shares at all?
Yes, most employees can, but usually only in open trading windows, often with pre-clearance, and never while holding material non-public information regardless of the window.
Does this apply to private companies?
The criminal market abuse regime targets traded securities, but confidentiality duties, employment contracts and fiduciary obligations still bind people in private businesses, and misusing confidential information there carries its own legal consequences.
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