NO.PZ2023061903000008
问题如下：
Q. When the spread between 10-year US Treasury yields and the short-term federal funds rate narrows and at the same time the prime rate stays unchanged, this mix of indicators most likely forecasts future economic:选项：
A.growth. B.decline. C.stability.解释：
B is correct. The narrowing spread of this leading indicator foretells a drop in short-term rates and a fall in economic activity. The prime rate is a lagging indicator and typically moves after the economy turns.
short-term federal funds rate narrows
prime rate stays unchanged
分别意味着什么？相关知识点可否再讲一下，谢谢
