Oil prices fell on Thursday amid volatile currency and stock markets, coupled with concerns that an economic slowdown in 2019 will cut into fuel demand just as crude supplies are surging. Pumpjacks are seen against the setting sun at the  U.S. West Texas Intermediate crude oil futures dropped 75 cents to $45.79 a barrel by 0900 GMT. International Brent crude futures were down 50 cents at $54.41 a barrel. In physical oil markets, top exporter Saudi Arabia is expected to cut February prices for heavier crude grades sold to Asia by up to 50 cents a barrel due to weaker fuel oil margins, respondents to a Reuters survey said on Thursday. “Fears of future economic and earnings growth continue to be the main driver in causing market jitters,” Singapore-based brokerage […]