Brent crude slumped, trading near a five-year low as an Iranian official predicted a further decline in prices if solidarity among OPEC members falters. West Texas Intermediate also sank. Futures slid as much as 1.8 percent in London . Crude could fall to as low as $40 a barrel amid a price war or if divisions emerge in the Organization of Petroleum Exporting Countries, said an official at Iran ’s oil ministry. The U.S. Energy Information Administration reduced its price forecasts for next year while also downgrading its production outlook for a second month. U.S. output is at a three-decade high. Brent collapsed 15 percent since OPEC agreed to leave its production ceiling unchanged on Nov. 27, resisting calls from members including Venezuela to cut output to stabilize prices. Saudi Arabia and Iraq this month deepened discounts on crude exports to their customers in Asia , bolstering speculation that […]