Definition
Insider trading is when someone uses confidential, non-public information to make investment decisions, giving them an unfair advantage. It's like knowing the answers to a test before everyone else. This is illegal because it undermines the fairness and integrity of the stock market. Imagine if only a select few knew when a company was about to announce great earnings or a major setback; they could profit unfairly. It's the opposite of a level playing field. Think of it as cheating in a game where everyone else is playing by the rules.