(Bloomberg) -- The fastest-growing bet in the oil market these days is that the price of crude will double to $200 a barrel by the end of the year.

Options to buy oil for $200 on the New York Mercantile Exchange rose 10-fold in the past two months to 5,533 contracts, a record increase for any similar period. The contracts, the cheapest way to speculate in energy markets, appreciated 36 percent since early December as crude futures reached a record $100.09 on Jan. 3.

While analysts at Merrill Lynch & Co. and UBS AG say the slowing U.S. economy will lead to the biggest drop in prices since 2001, the options show some traders expect oil to rise for a seventh straight year. Demand will increase 2.5 percent in 2008, according to the International Energy Agency. U.S. inventories fell to a three-year low on Dec. 28. Production from Mexico is declining and Saudi Arabia is behind schedule in opening its newest field.

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