The term profit in economics has a very precise meaning.Economists, however, often loosely refer to "good deals" or profitable ventures with no risk as profit opportunities. The general view of economics is that profit opportunities are rare.At any one time there are many people searching for such opportunities, and as a consequence few exist. At major banks in big cities, you can buy foreign currencies. The prices of these currencies are determined in world markets. With dollars we can buy marks, with these marks we can buy francs, and with these francs we can buy back dollars. If, for example, the dollar-franc price is too low with respect to the other prices, there is an immediate rush to buy dollars and sell francs, not by ordinary citizens at bank windows, but by a few large currency traders in Tokyo or New York who watch prices every minute. Such a rush drives up the dollar-franc price to the no-profit-opportunity point. There are in fact almost never any profit opportunities of this kind in foreign currency markets. Markets like this, where any profit opportunities are eliminated almost immediately, are said to be efficient markets. The common language way of expressing the efficient markets hypothesis is "there’s no such thing as a free lunch." How should one react when a stock broker calls up with a hot tip on the stock market With doubt. There are thousands of individuals each day looking for hot tips in the market, and if a particular tip about a stock is valid, there will be an immediate rush to buy the stock, which will quickly drive its price up.By the time the tip gets to your broker and then to you, the profit opportunity that arose from the tip (assuming that there was one) is likely to have been eliminateD、 This economists’ view that there are very limited profit opportunities around can, of course, be carried too far. There are clearly times when profit opportunities exist. Someone has to be the first to get the news, and some people have quicker insights than others. Nevertheless, news does get spread quickly, and there are thousands of people with quick insights. The general view that profit opportunities are rare is close to the mark_ What do profit opportunities mean in economics A、Profitable businesses without any risk. B、Business deals that produce profit. C、Business opportunities that many people search for. D、Trading foreign currencies and stocks.
试题查看
参考答案： 
答案解析