Tokyo — Oil futures dropped on Wednesday, extending losses from the previous day, after US crude stockpiles grew more than expected, adding to the worry about oversupply.

Brent crude was down 29c, or 0.7%, at $42.34 a barrel by 3.35am GMT, while US West Texas Intermediate (WTI) crude futures fell 35c, or 0.9%, to $40.02 a barrel...

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