Since the outbreak of COVID-19, the US economy has been severely damaged, with many companies laying off workers and many people losing their jobs. US Federal Government and all state governments, including some of the biggest companies, are actively seeking relief. Especially, US Federal Government has taken a series of massive actions to stable and stimulate economy. For example, two acts have been passed to allocate funds to federal agencies for vaccine development, free virus testing, paid leave for affected people, additional Medicaid funding and food aid. On 27 March 2020, President Trump signed a larger Economic Relief Package, Coronavirus Aid, Relief, and Economic Security (the “CARES Act”) into law. It is an economic stimulus...