问题如下：
The Merton model is used to predict default. It builds on several very strong assumptions and its applicability is hampered by practical difficulties. Which of the following statements does not correctly identify limiting assumptions or practical difficulties of using the model?
选项： The
model relies on a simplistic capital structure with only one debt issue.
The asset value volatility cannot be estimated because firm value does not trade.
C.The model assumes that debt does not pay a coupon while most publicly traded debt is coupon debt.
D.The model assumes a constant riskless interest rate.
解释：
ANSWER: B
This statement is incorrect because the asset volatility can be recovered iteratively from the equity volatility and model prices. Other statements are correct weaknesses of this model.
在Monte模型里面我们用的波动率是公司V百分比形式的波动率吗
