Farmers, for example, can easily find weather, crop and price information online.

VOA: special.2009.02.16

But that no particular stock is more or less likely to outperform the market, because all the information is incorporated in the price.

但是没有那一种特殊的股票是,最有可能比市场平均表现更好的，因为所有信息都是包含在价格上的。

麻省理工公开课 - 计算机科学及编程导论课程节选

since all the information is in the current price, you don't have to worry about whether it went up or down yesterday, to decide what it's going to do today.

因为当前价格代表了所有信息，你就不需要去考虑昨天股价,是涨了还是跌了，再去判断它今天的价格会怎么变化。

麻省理工公开课 - 计算机科学及编程导论课程节选