Investment in securities provides an important channel for the society to raise funds, which is an effective way for enterprises to raise direct financing. Solution: as long as the gasoline in the tank is exhausted, the extra gasoline vapor in the tank can be fired into the cylinder by the negative pressure of the engine, and no gasoline vapor will overflow. Followed by Edwards and bear published in his 1961 book "the theory of corporate earnings and measurement of the current operating profit is defined as the sales revenue more than the amount of current production and cost of sales, which can realize the cost savings is in this issue of asset price increases, which can realize the history of the cost savings are the pin commodity costs and the difference between the current purchase price; The realized capital gains are the amount of sales revenue greater than the historical cost when dealing with long-term assets. They argue that "these incremental sums provide investors with a reasonable starting point for measuring the scale of relative affluence and a detailed analysis of the company's operating results and comparable financial conditions". They stress that any full income analysis should take into account both realized and unrealized benefits and classify them by source. When are advantageous to occur, such as no record, will not only lead to current income can't reflect, but also can lead to later to sell assets to income and related costs to wrong ratio; Operating earnings and, on the other hand, the production gains is usually produced by different management decisions, and adopted different circulation form, therefore, make the same comment on both, will weaken the role of the income statement. In the latest "near-term energy outlook," the U.S. energy information administration (EIA) said that in November, conventional gasoline retail prices in the United States averaged $2.56 a gallon, up about 6 cents a gallon on a month-on-month basis. The data initially showed that crude prices were rising. Meanwhile, the U.S. energy information administration (EIA) forecasts that conventional gasoline retail prices in the U.S. will hit $2.59 a gallon this month, up 34 cents a gallon from the previous year. The U.S. energy information agency expects the average U.S. retail price to be at $2.51 a gallon by 2018. We are in an era of economic, political, technological, social change and development. In this era, change and development bring both opportunities and risks to people, especially in the competition for market, resources and spheres of influence. If managers in seize opportunities and take advantage of opportunities at the same time, and to minimize risk, that is on the way forward towards the goals set up a bridge of convenient and secure, so organizations can be in an impregnable position, in the opportunities and risks of the vertical and horizontal choice, get survival and development. If you don't plan, or have no plans at all, you'll have disastrous consequences. But when trump was a populist, he was once a populist, most recently by endorsing the supply-theory tax theory that most republicans still insist on. Mr Trump is also a man running on Washington, dc and on Wall Street. Yet he has piled his government with billionaires (not just millionaires) and Goldman alumni, while making the swamp of business lobbyists more than ever.