The illegal practice of trading securities based on material, non-public information that could affect the stock's price. This includes trading by corporate insiders or anyone who receives confidential information and uses it for personal gain, violating securities laws and market fairness principles.
Emerged in early 20th-century American securities law, combining 'insider' (one with privileged access) and 'trading.' The concept gained prominence with the Securities Exchange Act of 1934, which sought to prevent market manipulation and ensure fair trading based on publicly available information.
Insider trading is like having the answers to a test before everyone else takes it—it seems like easy money, but it destroys the whole system's integrity! Even seemingly innocent tips from friends or family can land you in federal prison, as Martha Stewart famously discovered.
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