你的问题是翻译这段话呢还是帮你写个论文?有效市场假说那么多怎么帮你解释?
（Efficient markets hypothesis）就是指：如果在一个证券市场中,价格完全反映了所有可获得的信息,那么就称这样的市场为有效市场.
衡量证券市场是否具有外在效率有两个标志 一是价格是否能自由地根据有关信息而变动 二是证券的有关信息能否充分地披露和均匀地分布 使每个投资者在同一时间内得到等量等质的信息.
根据这一假设,投资者在买卖股票时会迅速有效地利用可能的信息.所有已知的影响一种股票价格的因素都已经反映在股票的价格中,因此根据这一理论,股票的技术分析是无效的.（这个假说有三种形式.）
有效资本市场假说的三种形式
一、弱式有效市场假说（Weak Form Market Efficienty）
该假说认为在弱式有效的情况下,市场价格已充分反映出所有过去历史的证券价格信息,包括股票的成交价、成交量,卖空金额、融资金额等；
推论一:如果弱式有效市场假说成立,则股票价格的技术分析失去作用,基本分析还可能帮助投资者获得超额利润..
二、半强式有效市场假说(Semi—Strong Form Market Efficienty)
该假说认为价格已充分所映出所有已公开的有关公司营运前景的信息.这些信息有成交价、成交量、盈利资料、盈利预测值、公司管理状况及其它公开披露的财务信息等.假如投资者能迅速获得这些信息,股价应迅速作出反应.
推论二:如果半强式有效假说成立,则在市场中利用技术分析和基本分析都失去作用,内幕消息可能获得超额利润.
三、强式有效市场假说(Strong—Form Market Efficioncy)
强式有效市场假说认为价格已充分地反映了所有关于公司营运的信息,这些信息包括已公开的或内部未公开的信息.
推论三:在强式有效市场中,没有任何方法能帮助投资者获得超额利润,即使基金和有内幕消息者也一样.
我是学经济的,也酷爱英语,你的意思是想让我把它用英语给你解释了?我考那么多你1分不给我不想干啊~再说了我也不知道你啥意思!
In finance,the efficient-market hypothesis (EMH) asserts that financial markets are "informationally efficient",or that prices on traded assets,e.g.,stocks,bonds,or property,already reflect all known information.The efficient-market hypothesis states that it is impossible to consistently outperform the market by using any information that the market already knows,except through luck.Information or news in the EMH is defined as anything that may affect prices that is unknowable in the present and thus appears randomly in the future.
The Efficient Market Hypothesis was developed by Professor Eugene Fama at the University of Chicago Booth School of Business as an academic concept of study through his published Ph.D.thesis in the early 1960s at the same school.It was widely accepted up until the 1990s,when behavioral finance economists,who were a fringe element,became mainstream.[1] Empirical analyses have consistently found problems with the efficient markets hypothesis,the most consistent being that stocks with low price to earnings (and similarly,low price to cash-flow or book value) outperform other stocks.Alternative theories have proposed that cognitive biases cause these inefficiencies,leading investors to purchase overpriced growth stocks rather than value stocks.Although the efficient markets hypothesis has become controversial because substantial and lasting inefficiencies are observed,it remains a worthwhile starting point.
