Oil prices wavered Monday before settling lower on expectations that the coming meeting of the Organization of the Petroleum Exporting Countries would fail to stem a monthslong plunge in oil prices. Light, sweet oil for January delivery fell 73 cents, or 1%, to $75.78 a barrel on the New York Mercantile Exchange. Brent, the global benchmark, fell 68 cents, or 0.9%, to $79.68 a barrel on ICE Futures Europe. Prices rose earlier in the session on news that negotiations between Iran and six world powers to curb Iran’s nuclear program are to be extended past Monday’s deadline. Sanctions on Iranian oil exports, which are keeping hundreds of thousands of barrels of oil […]