The House on Wednesday passed a bill that would ban members of Congress from trading individual stocks.
U.S. stocks are falling from their record heights, while oil prices jump following escalations in the Middle East that may be undermining the ceasefire in the war with Iran.
Investors hoped the two-week pause in fighting would ease a global oil shortage.
Elon Musk's space exploration company has filed preliminary paperwork to sell shares to the public, according to two sources familiar with the filing.
The Dow Jones Industrial Average on Thursday closed down 785 points as the war with Iran escalated and oil prices continued to climb.
The Dow Jones Industrial Average closed down more than 400 points on Tuesday as the U.S.-Israeli war with Iran prompted a selloff.