On Monday, April 20, 2020, West Texas Intermediate (WTI) crude oil front-month futures traded on the New York Mercantile Exchange (NYMEX) were priced in negative dollars per barrel (b) for the first time since trading began in 1983. At about 2:30 p.m. ET, WTI traded as low as -$40.32/b; prices remained below zero for part of the following trading day.