Oil tumbles after OPEC cuts demand forecasts

Crude-oil futures fell further on Thursday after the Organization of the Petroleum Exporting Countries cut demand forecasts for its oil and investors worried about the health of the eurozone’s economy.

On the New York Mercantile Exchange, light, sweet crude futures for delivery in December CLZ4, -0.41%   fell 77 cents, or 1%, to settle at $77.91 a barrel.

December Brent crude LCOZ4, -0.56%  on London’s ICE Futures exchange fell 9 cents, or 0.1%, to $82.86 a barrel.