It gives weight to each index component according to the global commodity output, that is, the weight of each commodity in the index is determined by the average value of commodity output in the last five years. This weight system is adjusted every year, from 65438 to 10. On this basis, the Goldman Sachs Commodity Index also adjusts the commodities that make up the index according to the liquidity, so as to ensure the principle of "real price discovery, cost saving and actual investment", which is also the idea of Goldman Sachs to form the index. At present, Goldman Sachs Commodity Index (GSCI) includes 24 commodities: 6 energy products, 5 industrial metals, 8 agricultural products, 3 livestock products and 2 precious metals, and the weight of each commodity is adjusted once a year. The most striking feature of Goldman Sachs Commodity Index is that it gives high weight to energy prices, and the energy industry accounts for 75% of the index. This feature enhances the volatility of the index (due to the high energy product ratio and high energy volatility, the activity of the Goldman Sachs Commodity Index), and the futures contract of the Goldman Sachs Commodity Index (GSCI) is listed and traded on the Chicago Mercantile Exchange (CME). The main components of the index are energy products 79.04%, agricultural products 9. 16%, basic metals 5.82% and precious metals 1.6 1%. The above ratio will be re-evaluated annually according to the average dollar value of OECD data in the past five years. In 2005, the GSCI commodity index rose by 39% year-on-year, and in the first quarter of 2006, it fell by 3.6% year-on-year due to the sharp correction of energy and metal prices. In the Goldman Sachs Commodity Index (GSCI), copper only accounts for 2.4%, aluminum only accounts for 3. 1%, and lead and zinc are even less, and base metals account for 7.3% of the total weight.