The recent insider trading controversy triggered by the abrupt changes in tariff policies of the Trump administration has once again brought the issue of stock trading regulation among U.S. Congress members into the public spotlight. In April 2025, Trump suddenly announced a suspension of 'reciprocal tariffs' on several countries, causing a surge in the U.S. stock market. Meanwhile, his ally, Republican Congresswoman Marjorie Taylor Greene from Georgia, was reported to have intensively purchased tech stocks such as Apple and Nvidia just two days before the policy announcement, involving an amount of $315,000. This incident exposed the systemic loopholes that allow Congress members to profit from insider information.