【判断题】An efficient market is one where the prices of the assets traded in that market fully reflect all available information at any instant in time. 有效市场是指在该市场上交易的资产的价格在任何时刻都能充分反映所有可用信息的市场。
【单选题】Efficient market is a market which has no _________________to the free flow of goods and services, such as trade barriers, and prices reflect all available public information.