NO.PZ2015122802000064
问题如下：
An aggregate fixed-income index:
选项：
A.comprises corporate and asset-backed securities.
B.represents the market of government-issued securities.
C.can be subdivided by market or economic sector to create more narrowly defined indices.
解释：
C is correct.
An aggregate fixed-income index can be subdivided by market sector (government, government agency, collateralized, corporate), style (maturity, credit quality), economic sector, or some other characteristic to create more narrowly defined indices.
考点：债券指数
aggregate fixed-income index就是broad market indexes，简单来说就是债券的大盘指数包括了按各种维度划分的债券。所以选项A和B错在它说的太片面了。
Aggregate indexes can be subdivided by market sector (government, government agency, collateralized, corporate); style (maturity, credit quality); economic sector, or some other characteristic to create more narrowly defned indexes.
A为什么不对
