Here's a look at the most notorious insider trading scandals that rocked Wall Street and beyond

The recent arrests of NBA figures Chauncey Billups and Terry Rozier in connection with federal gambling probes have garnered national attention, but financial misconduct is hardly new to the business world.For years, scandals surrounding insider trading, which involves illegally buying or selling stock based on non-public information, have ensnared powerful figures from corporate executives to media personality Martha Stewart.Here’s a look at some of the most infamous controversies linked to insider trading.WHAT IS INSIDER TRADING?Former Goldman Sachs Group Inc. director Rajat Gupta was senten