Congress didn't make itself immune to insider trading. In fact they recently made it illegal for congressmen to trade based on confidential information. The re

Congress didn't make itself immune to insider trading. In fact they recently made it illegal for congressmen to trade based on confidential information. The reason it wasn't illegal for them before the recent law was because they weren't insiders. Congressmen do not owe a fiduciary duty to third party companies. And they don't owe congress or the government confidentially for stuff they learn on the job. In fact the whole insider trading rules were not even passed by congress. It's a mix of SEC regulation and essentially federal common law that created insider trading law. Also congress wasn't really immune. If a congressman payed Tim Cook for Apple info, that would have been illegal.