Energy Explained: Why WTI crude oil futures fell a mind-boggling 300% to -$37 Updated : April 21, 2020 10:28 AM IST US WTI May futures fell an unprecedented 300% to -$37. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.