Oil prices sank Thursday to lows last seen nearly four years ago as more bleak news from the world's largest economy boosted views that crude could tumble below $40 by the end of the year. After sinking more than $1 earlier in the day to approach levels traded at in February 2005, light sweet crude was trading at $46.10, down 69 cents in electronic trading on the New York Mercantile Exchange by noon in Europe. The contract fell 17 cents overnight to settle at $46.79. In London, January Brent crude fell 74 cents to $44.70 on the ICE Futures exchange. In other Nymex trading, gasoline futures fell nearly 3 cents to $1.01 a gallon. Heating oil dropped almost 2 pennies to $1.57 a gallon while natural gas for January delivery was steady at 6.34 per 1,000 cubic feet. “You could see prices testing $40 by the end of the year because the economic data is really ugly at the moment,” said Christoffer Moltke-Leth, head of sales trading at Saxo Capital Markets in Singapore. “Demand destruction is still very much the concern.” Oil prices have tumbled about 69 percent since peaking at $147.27 in July. But trader and analyst Stephen Schork suggested that the price decline had some ways to go before bottoming out, despite the arrival of the cold season in the US and elsewhere in the Western hemisphere, which traditionally drives up demand. “The only place colder than the (US) Northeast and Midwest is the Floor of the NYMEX,” he said, in his Schork Report. Investors were dismayed at more poor economic news from the US. The Institute for Supply Management said Wednesday its services sector index fell to 37.3 in November from 44.4 in October. The reading was significantly lower than the 42 the market expected.