“ A historic drop occurred on April 20, (2020) when the price of West Texas Intermediate crude dropped by almost 300%, trading at around negative $37 per barrel”
https://www.cnbc.com/2020/06/16/how-negative-oil-prices-revealed-the-dangers-of-futures-trading.html
Futures ...
““ A historic drop occurred on April 20, (2020) when the price of West Texas Intermediate crude dropped by almost 300%, trading at around negative $37 per barrel””
That was the expiring May contract. The June contract was $25 on the same day.