Insider Trading Fraud
Trading financial securities based on material non-public information obtained from a position of trust or access, giving an unfair advantage over other market participants.
Also known as: insider dealing, market abuse, front-running
Last reviewed: 1 June 2026
Insider trading fraud occurs when someone buys or sells securities — stocks, options, bonds — based on significant information about a company that is not yet available to the public, obtained through employment, professional service, or a leak from someone in such a position. This creates an unfair market advantage: the insider profits (or avoids losses) in ways unavailable to regular investors who act on public information only.
Classic examples include a corporate executive buying shares ahead of an unannounced merger, a lawyer advising on a takeover tipping off a friend, or an employee leaking earnings data before a results announcement. The fraud extends beyond the direct insider: anyone knowingly trading on the tipped information ('tipping') is also liable.
Insider trading is illegal in most jurisdictions and is prosecuted by financial regulators — the FCA in the UK and the SEC in the US. Penalties include disgorgement of profits, fines, and custodial sentences. Regulators use sophisticated market surveillance systems that flag abnormal trading patterns ahead of major corporate announcements, enabling retrospective investigation.
Examples
- A corporate lawyer advising on an acquisition purchases shares in the target company before the deal is announced publicly, selling after the price rises on news of the takeover.