【单选题】下列有关证券组合投资风险的表述中,不正确的是( )。
A.
证券组合的风险不仅与组合中每个证券的报酬率标准差有关,而且与各证券之间报酬率的协方差有关
B.
投资组合的β系数不会比组合中任一单个证券的B系数高
C.
资本市场线反映了持有不同比例无风险资产与市场组合情况下风险和报酬的权衡关系
【判断题】Goods produced abroad and sold domestically are called exports and goods produced domestically and sold abroad are called imports.
【单选题】A country that is saving more than it is investing domestically:
A.
has a current account surplus.
B.
has a financial account deficit.
D.
has a trade disequilibrium.
【单选题】This company operates only domestically.