Nigeria on Wednesday cut its forecast for oil prices and the value of its currency this year, an acknowledgment of the pain tumbling energy costs are inflicting on Africa’s top crude producer. The senate voted to cut its benchmark expectation for oil prices this year to $52 a barrel, from $65 in December. Senators also pegged the average value of the local currency, the naira, this year at 190 to the U.S. dollar, well below the previous target of 165 to the greenback. Brent crude traded at about $59 a barrel on Wednesday and one dollar was worth about 200 naira. The currency has plunged to record lows this year as oil prices have lingered at about half their value just six months ago. Nigeria, Africa’s biggest economy, draws about 70% of government revenue and most of its foreign exchange earnings from its oil output. The plummeting value […]