Crude oil futures extended losses sustained overnight during mid-morning Asian trade Aug. 19, as concerns over the slowdown in oil demand intensified after US data showed a build in US gasoline stockpiles, while investors remained spooked by the delta variant spread.

　　Crude oil futures extended losses sustained overnight during mid-morning Asian trade Aug. 19, as concerns over the slowdown in oil demand intensified after US data showed a build in US gasoline stockpiles, while investors remained spooked by the delta variant spread.