The US crude West Texas Intermediate (WTI) slumped below $0 per barrel for the first time in history while its peer Brent comparatively remained stable, dropping 9 per cent to $25.57 a barrel. Here is an explainer of what WTI is, and how and why it fell to an unprecedented level on Monday. Also Read: MIDDLE CLASS AMID THE LOCKDOWN What are Grades of Oil Three main grades or benchmarks for oil are- WTI, Brent and Dubai/Oman. Almost all of the crude oil prices are pegged to the three grades. Oil Grades Trading WtTI is considerably light by the virtue of its low density and low sulphur content. However, Brent is lighter than WTI. Trades related to WTI take place in The New York Mercentile Exchange, like wise Brent contracts on the ICE Future Europe and Dubai grade on the Dubai Mercentile Exchange. Also read: How The World Will Emerge After The Pandemic Oil Futures and Their Functioning Oil futures played a pivotal role in the fall of WTI. These Futures are b...