问题如下图：
选项：
A. 
B. 
C. 
解释：
A错在哪儿？信息都无效不是说明市场有效吗？
NO.PZ2018062002000036 问题如下 Iris, a financianalyst, recently stuehow well the country's financimarket is functione Accorng to her research, the market transaction costs are low but the trang volumes are very high in this market. Therefore she believes the market liquity is quite high. Whiof the following statements is correct? A.In sua market, it is harfor trars to make use of their information. B.In sua market, it is easy for trars to tra antheir transactions will rethe effectiveness of market information. C.In sua market, it is easy for trars to tra antheir transactions will improve the effectiveness of market information. In a highly liquimarkets, for informetrar, the completion of their orrs is relatively easy. Their trang will make prices to incorporate the information, anthe priwill consistent to its funmentvalues.考点Well FunctioneFinanciMarket一位金融分析师Iris正在检查一个国家的金融市场是否运转良好，她发现该市场交易成本低、交易量很高，她认为该市场的流动性很好。那么在这样的市场中，下列说法正确的是A.说反了。题干说交易成本很低，流动性很好，此时如果分析师认为某只股票被低估了，那么在市场中很容买到。相反，如果此时交易成本很高，流动性又很差，那么即便分析师有判断，也无法实施，这个叫做harto make use of inforamation。B和C前半句一样，都是正确的易成本很低，流动性很好的市场，交易员很容易交易。市场中交易越多，市场的就会越有效。因此B错在后半句。 AIn sua market, it is harfor trars to make use of their information.在这样的市场中，交易者很难利用他们的信息。因为市场有效 → 所以市场反应了所有的信息 → 在这样的市场 交易者难以利用已知信息。老师这样理解为什么不对哇？请老师指正，谢谢。
NO.PZ2018062002000036 In sua market, it is easy for trars to tra antheir transactions will rethe effectiveness of market information. In sua market, it is easy for trars to tra antheir transactions will improve the effectiveness of market information. In a highly liquimarkets, for informetrar, the completion of their orrs is relatively easy. Their trang will make prices to incorporate the information, anthe priwill consistent to its funmentvalues. 考点Well FunctioneFinanciMarket 一位金融分析师Iris正在检查一个国家的金融市场是否运转良好，她发现该市场交易成本低、交易量很高，她认为该市场的流动性很好。那么在这样的市场中，下列说法正确的是 A.说反了。题干说交易成本很低，流动性很好，此时如果分析师认为某只股票被低估了，那么在市场中很容买到。相反，如果此时交易成本很高，流动性又很差，那么即便分析师有判断，也无法实施，这个叫做harto make use of inforamation。 B和C前半句一样，都是正确的易成本很低，流动性很好的市场，交易员很容易交易。市场中交易越多，市场的就会越有效。因此B错在后半句。 如题。。。。。。。。。
市场流动性高，价格反应信息的速度快，信息的有效性就会随着交易的增加而变得无效，为什么流动性高提高了信息的有效性？这个有效性到底是指什么
