A three-day rally for crude oil prices came to an end Wednesday after OPEC said in its monthly report for April that demand was expected to falter. The Organization of Petroleum Exporting Countries said its forecast for growth in world oil demand in 2016 was lowered by 50,000 barrels per day to 1.2 million bpd. That’s lower than the estimated growth for 2015 by more than 20 percent.