The shutdown impeded trade by keeping the government form issuing new licenses for imports and exports. OMB reported that two million liters of American products were stalled at ports.
The government closure also kept agencies from approving loans. The Small Business Administration could not process 700 loan applications totalling $140 million.
The shuttering of national parks also cost the tourism industry about $500 million in visitor spending.
Correction: This post orginally stated that the shutdown cost the GDP $2-$6 million.