Struggling companies can draw from a $500 billion pool, though companies receiving emergency funds face several restrictions. Participating companies are banned from issuing stock buybacks or paying dividends until one year after they pay back their loans. Recipient firms will also be forced to limit executive compensation.
Trump has repeatedly hinted that much of the aid will flow to Boeing, which has seen its stock price tumble as much as 72% from mid-February highs.
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The legislation further includes $50 billion specifically set aside for passenger air carriers. The industry is among the hardest hit by the virus, as containment measures cut into domestic travel and limited international flights.
Small businesses, or companies with 500 employees or less, will get $367 billion. The firms will be encouraged to maintain payroll, and costs including mortgage interest, rent, and utilities may be forgiven if certain requirements are met.
The Treasury Department will disclose terms for loans made to all firms, while a new inspector general will oversee the offerings.
State and local governments will receive up to $150 billion worth of loans.