请问老师，复制指数是什么意思？有哪些指数是可以复制的呢？

问题如下：

Regarding fixed income indexes, which of the following descriptions is least accurate ?

选项：

A.

There are various types in the composition of fixed income indexes.

B.

It is difficult and expensive for fixed income portfolio managers to replicate a fixed income index.

C.

The data of fixed income securities are relatively easy to get because the securities are often liquid.

解释：

C is correct.

Index providers must depend on dealers for fixed income security prices and the securities are illiquid. So data are relatively difficult to get.

C是正确的。

对于债券一类的固定收益类证券，很多债券都是公开发行后就被投资者持有不再进行交易的，所以这些债券的流动性很差，市场上很难获得这些债券的信息，所以C不正确，选C.

而B是正确的，因为一方面组成指数的某些债券很少有人卖出，所以很难获得（流动性不佳，买入成本就可能非常高昂）；另一方面市场上的债券数量和类型也比股票多许多倍，一个指数内部构成的债券也会相对复杂；这些因素都会大导致基金经理复制指数变得又困难又昂贵。