问题如下：
Net interest margin of a financial-service
provider is influenced by multiple factors, which of the following statements
is NOT correct?
选项：
A. the spread between borrowing
costs and interest revenues is constant, thus the net interest margin is
influenced by the volume of assets and liabilities.
Net interest margin is
influenced by changes in the volume of interest-bearing assets a financial
institution holds
Net interest margin is
influenced by changes in interest-bearing liabilities that are used to fund
earning assets.
Net
interest margin is influenced by changes in the mix of assets and liabilities
that management draws upon.
解释：
考点：对Risk Management for Changing Interest
Rates: ALM and Duration Techniques- Protect The Net Interest Margin的理解
答案：A
解析：
选项A错误，Spread不能保持恒定，A选项说的Constant错误。
请问A选项中说的the spread between borrowing costs and interest revenues is constant, thus the net interest margin is influenced by the volume of assets and liabilities.
我理解就是当cost和int revenue之间的spread是恒定时，那么NMI只受asset liab量的影响。为啥不对呢？
