U.S. markets wrapped up one of their messiest-ever weeks Friday, tumbling more than 10 percent from where they began Monday for their worst finish since the 2008 financial crisis. Stocks were wrenched all week in hourly spasms as investors tried to fathom where the coronavirus will eventually leave the U.S. economy.

Oil is set to end its most dramatic week in recent memory with the biggest plunge since 2008, as major producers prepare to drench the market with supply just as the coronavirus crushes demand.