Oil dips on worries U.S.-China trade deal could slip to next year

SINGAPORE (Reuters) - Oil prices retreated on Thursday as a spat over Hong Kong added to worries of a delay in any U.S.-China trade deal, after posting steep gains in the previous session on bullish U.S. crude inventory data.The trade war between the world's two biggest economies has dominated the outlook for future oil demand, and trade experts have warned the completion of a "phase one" U.S.-China trade deal could slip into next year. Brent crude futures fell 25 cents, or 0.4%, to $62.15 a..