Aluminum is the second largest metal after steel. Aluminum is widely used in construction, packaging, electronics and other industries because of its portability, good ductility and strong corrosion resistance. In 2000, the global aluminum production reached 2 1, 1, 9 1, 000 tons, and the trading volume of aluminum futures and options on the London Metal Exchange (LME) reached 25 million lots (about 600 million tons). From 200 1 to1-July, the trading volume of aluminum futures options on the London Metal Exchange reached 15, 170, 158 lots (about 370 million tons). The London Metal Exchange aluminum contract is 99.7% pure aluminum, 25 tons per lot (+/-2%), and the minimum fluctuation price of aluminum contract is 50 cents/ton. ;