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US benchmark West Texas Intermediate for May delivery was changing hands at USD 0.56 a barrel after closing at – USD 37.63 in New York.
Space is scarce to store oil amid the current glut, meaning there have been few buyers for the commodity.
The May WTI contract closes on Tuesday, and the contract for June delivery is now more actively traded. That enjoyed a modest increase on Tuesday after heavy falls a day earlier, rising to above USD 21 a barrel.