Mumbai, April 22: It is a grim situation, playing out in the oil markets grabbing eyeballs of the entire investor fraternity and defying logic. The absolute collapse of West Texas Intermediate (WTI) prices is primarily owing to the expiry of May WTI futures contracts on NYMEX. In overnight trade, May futures for US crude oil fell to minus $37.63 a barrel level, ahead of their Tuesday expiry. The trend was seen at a time when 90 per cent of the world is under lockdown and there is virtually no demand for crude oil.