Earlier quoted context omitted.
I've often wondered about this. It's mind boggling that this is allowed. A congressman can short oil stocks and the very next day propose a large tax on oil producers then promptly cash out, and be completely within the bounds of the law.
I don't think it's mindboggling at all. It makes perfect sense that lawmakers would not make laws that negatively affect lawmakers. I also think that the amount of nonpublic information that congresscritters have access to is substantially overblown. The fact that they can pass laws affecting the industries is a bigger lever, in my view.
Such a tool was actually used to disrupt a rice panic once. Without releasing any surplus, an announced joint intent to release surplus drove speculators out of the market. https://www.npr.org/sections/money/2011/11/04/142016962/the-...