Sources of information on agricultural futures For agricultural futures, the most important information in the international market is the monthly report on the supply and demand of world agricultural products issued by USDA, the crop growth report issued by USDA and the weekly inspection and sales report on oil and grain exports, the global market inspection report issued by international organizations such as the World Food Organization and the American Soybean Association, the American Grain Association and the French Grain Export Association, and the global oil crop market evaluation report regularly issued by the German magazine Oil World. In addition to the above-mentioned official reports, non-governmental forecasting institutions such as SPARK Company of the United States also regularly publish forecast data such as oil crop output and inventory. Important information on the domestic market includes monthly and ten-day market monitoring reports and market news of major agricultural products released by the National Grain and Oil Information Center, monthly import and export data of agricultural products released by the General Administration of Customs, the latest agricultural policy released by the Ministry of Agriculture in relevant media, the forecast report on the planting area of domestic agricultural products released by the National Bureau of Statistics every March, and information reports on weather disasters, agricultural bumper harvest, grain storage and grain auction by relevant domestic media. These are all official information materials worthy of comprehensive study. In addition, some domestic large-scale grain and oil import and export groups (such as COFCO and Zhonggu Group) have tracked the domestic crop production, import and export policy changes, and the amount of oil imported ashore, as well as the crop production survey reports organized by some large futures companies or information media organizations are also important reference materials. Domestic spot websites related to agricultural futures include: China Agricultural Information Network (sponsored by Information Center of Ministry of Agriculture, which mainly publishes agricultural policy information), China Grain Information Network (sponsored by Grain and Oil Information Center of State Grain Bureau, which mainly publishes market information), China Feed Industry Information Network (sponsored by Information Center of Ministry of Agriculture and China Feed Industry Association), China Grain Network (sponsored by Zhengzhou Grain Wholesale Market, which mainly publishes food information), Cheng Bang Oil Network (which mainly publishes oil information) and Cheng Bang Oil Network. Foreign related futures websites include: USDA website, Chicago Board of Trade website, American Commodity Futures Trading Commission website, futuresource website, etc. (The copyright of this article belongs to the author himself, and no one may reprint or spread it without permission. The information sources of metal futures are closely related to the international market, and the basic information of the international metal market includes the international political situation, the world economic situation, the changes of the world financial and monetary policies, etc. Therefore, it is best to study metal futures with information systems such as Reuters or Jonathan Hay. For the metal market, the monthly global copper supply and demand published by the International Copper Organization Research Institute (ICSG), the economic data of major metal consuming countries, the weekly COMEX position report published by the Commodity Futures Trading Commission (CFTC) and the metal inventory data published by major exchanges are the basic data for studying the metal market. Domestic spot websites related to metal futures mainly include: China Nonferrous Information Network (government website of State Nonferrous Metals Industry Bureau), China Metal Network, China Copper Network, Shanghai Metal Network, China of International Copper Association, Huatong Nonferrous Metals Market and Shanghai Metal Market. Foreign related websites include: London Metal Exchange website, New York Commodity Futures Exchange website, American Commodity Futures Trading Commission website, etc. The basic factors affecting price changes can be summarized as follows:

1, supply and demand. Futures trading is the product of market economy, so its price changes are affected by the relationship between market supply and demand. When supply exceeds demand, futures prices fall; On the contrary, futures prices will rise.

2. Economic cycle. In the futures market, price changes are also affected by the economic cycle, and price fluctuations will occur at all stages of the economic cycle.

3. Government policies. Some policies and measures formulated by governments of various countries will have different degrees of influence on the futures market price.

4. Political factors. The futures market is very sensitive to the change of political climate, and the occurrence of various political events will often have different degrees of impact on prices.

5. Social factors. Social factors refer to the public's ideas, social psychological trends and the information influence of the media.

6. Seasonal factors. Many futures commodities, especially agricultural products, have obvious seasonality, and their prices fluctuate with the changes of seasons.

7. Psychological factors. The so-called psychological factor is the degree of confidence of traders in the market, which is the so-called "popularity". If you are optimistic about a commodity, even if there are no favorable factors, the price of the commodity will rise; When you are bearish, there is no news of profit and weakness, and the price will also fall. For another example, some large speculative commodities often use people's psychological factors to spread some news and artificially sell or supplement speculative commodities in large quantities to seek speculative profits.

8. Financial and monetary factors. In the process of world economic development, inflation, currency exchange rate and interest rate fluctuations in various countries have become common phenomena in economic life, which have brought increasingly obvious influence on the futures market.