NEW YORK — Oil futures plunged below zero on Monday, the latest never-before-seen number to come out of the economic coma caused by the coronavirus pandemic. Stocks and Treasury yields also dropped on Wall Street, with the S&P 500 down 1.8%, but the market's most dramatic action by far was in oil, where the cost to have a barrel of U.S. crude delivered in May plummeted to negative $37.63. It was at roughly $60 at the start of the year. Traders are still paying $20.43 for a barrel of U.S. oil to be delivered in June, which analysts consider to be closer to the "true" price of oil. Crude...…NEW YORK — Oil futures plunged below zero on Monday, the latest never-before-seen number to come out of the economic coma caused by the coronavirus pandemic. Stocks and Treasury yields also dropped on Wall Street, with the S&P 500 down 1.8%, but the market's most dramatic action by far was in oil, where the cost to have a barrel of U.S. crude delivered in May plummeted to negative $37.63. It was at roughly $60 at the start of the year. Traders are still paying $20.43 for a barrel of U.S. oil to be delivered in June, which analysts consider to be closer to the "true" price of oil. Crude...WW…