That is to say, current prices reflect all publicly known information about each stock, and therefore are unbiased.

也就是说，现在的价格,反映了关于股票的所有公共信息,也就是说它是无偏向性的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Today, it's priced given the best-known information and so tomorrow it's equally likely to go up or down.

由最广泛的信息所决定的,所以明天它涨价和降价的概率是相等的。

麻省理工公开课 - 计算机科学及编程导论课程节选