Would it be possible to see the price of oil cheaper than the price of water, or even negative? The answer is Yes. April 20, 2020 made a totally different day in oil-market history as the day when the U.S. benchmark price for crude dropped below zero for the first time -- and then kept falling. In a massive and unprecedented swing, the future contracts for May delivery of West Texas Intermediate tumbled to minus $37.63 a barrel.How do you explain this negative oil future price. You think it's reasonable, please explain the rationality. If not reasonable, please explain what caused it.