TOKYO — Sony says it will shut down a CD manufacturing plant in the United States by the end of March and its 310 workers will be laid off.

Sony spokeswoman Mami Imada said today the plant closure in New Jersey was due to declining CD sales as more people opt to buy music digitally.

After the closure of the New Jersey factory, the Indiana plant will become Sony's only CD manufacturing plant in the country.

Sony is hoping to expand its global presence in the digital music market dominated by Apple.

Oil futures hovered above $91 a barrel today, largely shrugging off higher oil demand forecasts from OPEC and the IEA as trading in the February contract dwindled ahead of its expiration.By early afternoon in Europe, benchmark crude for February delivery was down 35 cents to $91.19 a barrel in electronic trading on the New York Mercantile Exchange.Floor trading was closed in New York on Monday due to the Martin Luther King holiday. The contract, which last settled in New York on Friday at $90.54, expires in a day and trading is already shifting to the March contract.While some market experts had predicted that speculative investors could drive oil prices beyond $100 a barrel, it seemed that the current rally would fall short of that milepost.“The market clearly lacks the drive to run at the $100 mark at the moment,” said analysts at Commerzbank in Frankfurt. “Given the substantial overhang of speculative long positions, we could see profit-taking, which could result in a further decline in the price of crude oil.”Oil prices got a little support from the monthly report from the Organization of Petroleum Exporting Countries which raised slightly the forecast for demand for its crude.

MINNEAPOLIS — Delta is opening earnings season for airlines with a $19 million profit for the fourth quarter.But shares fell in premarket trading as Delta says it is adding more flying capacity. Investors may question if there is enough demand to support it.Delta plans to increase its capacity as much as 7 percent overall during the first quarter. Much of that is on international routes.Delta Air Lines earned 2 cents per share for the fourth quarter. Not counting special items it would have earned 19 cents per share. Analysts surveyed by FactSet expected 25 cents per share.Revenue rose 14 percent to $7.79 billion, which is more than analysts expected.Delta shares dropped 4.7 percent to $12.15 in premarket trading.