Free market requires free access to information, congress members by design get access to information that is not available to the rest of the “free” market. So

Free market requires free access to information, congress members by design get access to information that is not available to the rest of the “free” market. So congressional access to the free market is a violation of the entire concept. Either all market relevant information that Congress receives is made completely available to public at the same time as to Congress or Congress cannot have access to the market.