市場效率
market efficiency
通常指股票市場對訊息所作出的反應速度。市場反應效率有多種形式： i)弱式(weak form) 現價全面反映所有過往價格的資料 ii)半強式(semi-strong form) 現價全面反映公開的資料 iii)強式(strong form) 現價全面反映所有公開或不公開的資料 .
Usually refers to the speed of response to the stock market posts made. Market reaction efficiency in many forms: i) weak formula (weak form) at current prices fully reflect all historical price data ii) semi-strong form (semi-strong form) at current prices fully reflect public information iii) strong form (strong form) Full price reflect all public or private information.