优先股常常被人称为混合证券，因为它兼有普通股和债券的特点。
Preferred stock is often referred to as a hybrid security because it has many characteristics of both common stock and bond.
可转换债券是固定收益证券的一种，是债券和股票看涨期权的混合证券。
Convertible bonds belong to the fixed income bonds, as hybrids of the bonds and call option.
不同的证券在不同的时间会有不同的表现，所以混合资产的类型，你的整个资产组合不会因为某一种证券的颓败而受到影响。
Different securities perform differently at any point in time, so with a mix of asset types, your entire portfolio does not suffer the impact of a decline of any one security.
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