What are some recent high-profile cases of insider trading, and what lessons can be learned from them?

Insider trading has been a persistent problem in the financial markets, and numerous high-profile cases have occurred over the years. One of the most notable examples is the case of Raj Rajaratnam, the founder of the Galleon Group hedge fund, who was convicted of insider trading in 2011 and sentenced to 11 years in prison. The case involved numerous instances of illegal trades based on inside information, including information a....