问题
单项选择题
Which of the following best explains the slope of the yield curve（）
A. The term spread between the yields of two maturities.
B. The credit spread between two securities with different maturities.
C. The nominal spread between two securities with different maturities.
答案
参考答案：A
解析：
Since the yield curve depicts the yield on securities with different maturities, the slope of the curve between two maturities is a function of the maturity spread.