WTI and Brent are the two benchmarks for crude oil prices. WTI generally trades at a discount to Brent. However, on April 20, the WTI plunged below -$37 per barrel. Think of it this way, oil producers are paying you money to buy crude. To be sure, this is not the first time a commodity has turned negative. Natural gas prices in the United States have achieved this feat before. Before we discuss the implications of negative crude oil prices, let us first discuss natural gas and the difference between WTI and Brent.