The knowledge of the futures market is not too much. If you work hard, you will be able to learn the knowledge of futures by the end of the year. So the introduction of futures is very easy, but this is only the first phase of learning. After completing this initial study, many people conclude that futures are easy to operate and start trading. As a result, losses ensued, and in real deals he found that he had too much to learn. This will allow investors to move quickly into the second phase of learning: confusion and confusion. At this stage, investors find that there is so much to learn that they don't know what to learn. It seems that everything needs to be learned, and it seems that learning nothing is useless. Most investors are not able to get through this stage and are eliminated from the market. Investors who can get through this stage will enter another state where he can form his own trading philosophy, form his own trading patterns, and even form his own trading philosophy. In other words, his mind and trade have formed a system. But he still phases into the state of investors profit, it is impossible to a steady profit, the average person after reaching this state, he again learning motivation will gradually lose, he started to cycle around their own system, he felt he had to understand the market: the market. But the market is far from "just that". His own system began to become a barrier to his further learning, and he began to close himself, deny others, even laugh at investors in the first two stages, and refuse to communicate with others. Indeed, there are not many people who can reach this stage, so he becomes lonely and it is difficult to learn and progress again. When investors reach this stage, they will form their own system: technical or fundamental, or policy-based, much like the wuling faction, each other light. However, the study of the futures market is really starting from the third stage, which is equivalent to the basic course, and the third stage begins to enter the specialized courses. The first two stages are all knowledge, and the third stage is to learn skills. The learning of skills is endless and the continuous improvement of skills is the foundation for you to stay profitable. In the early 20th century, famous American economist elvin fisher developed the theory of economic gain. In its book "the nature of capital and yield", first, the concept of yield is analyzed in terms of the performance of earnings, and three different types of benefits are proposed: The American petroleum institute (API) released data showing a decline in U.S. crude oil and refined refining inventories, while gasoline inventories rose. In New York, the U.S. energy information administration (EIA) released data showing U.S. crude inventories fell by 649.5 million barrels a day in the week ended Dec. 15, beating expectations. Gasoline stocks rose by 12.37 million barrels, but the increase was less than expected.