Some traders and investors are stepping back from the oil market ahead of the most widely watched OPEC meeting in years, anticipating that thin holiday trading could exacerbate big price swings. Oil experts say the Organization of the Petroleum Exporting Countries, which controls roughly a third of global crude output, needs to curb production by at least 3%, or one million barrels a day, to bring supplies closer in line with demand. Such a move could put a floor under oil prices, which have plunged about 30% since mid-June. Oil prices settled down 73 cents, or 1%, at $75.78 a barrel Monday on the New York Mercantile Exchange. OPEC is scheduled to meet on Thursday in Vienna. Many oil traders in the U.S. will be taking the day off for Thanksgiving. According to the Nymex schedule, electronic trading will run until 1 p.m. New York time […]