Precious metal "precious" metal can also be determined by high demand or market value. Precious metals in bulk form are known as bullion and are traded on commodity markets. Bullion metals may be cast into ingots or minted into coins. The defining attribute of bullion is that it is valued by its mass and purity rather than by a face value as money. The level of purity varies from issue to issue. "Three nines" (99.9%) purity is common. The purest mass-produced bullion coins are in the Canadian Gold Maple Leaf series, which go up to 99.999% purity. A 100% pure bullion is
Commodity trading in China protect hog breeders from being exposed to sharp price swings. As a major producer and consumer of commodities, China has large potential for developing its futures market. China's commodity futures markets have expanded product ranges and deepened liquidity pools to cater to the increasingly diverse needs of the nation's rapidly growing economy. With increasing volatility in global commodity markets and prices, companies have been expanding their agricultural product, precious/base metal, fuel oil and other commodity-related investments in China. There are three commodity exchanges in China after the merger of 50 exchanges into 14 in 1995 and subsequently into three in