NO.PZ2023080903000022
问题如下：
Given the following context:
The real risk-free rate of return is 2.5%.
The expected inflation premium is 4.5%.
The market-driven interest rate for a specific security is 9.8%.
What is the cumulative impact of the default risk premium, liquidity premium, and maturity premium for this security?
选项：
A.2.8%
B.4.5%
C.8%
解释：
9.8%-2.5%-4.5%=2.8%
这个利率是指什么
