NO.PZ2023061903000011
问题如下：
Q. When aggregate real personal income, industrial output, and the S&P 500 Index all increase in a given period, it is most accurate to conclude that a cyclical upturn is:选项：
A.occurring. B.about to end. C.about to begin.解释：
A is correct. Aggregate real personal income and industrial output are coincident indicators, whereas the S&P 500 is a leading indicator. An increase in aggregate personal income and industrial output signals that an expansion is occurring, whereas an increase in the S&P 500 signals that an expansion will occur or is expected to continue. Taken together, these statistics indicate that a cyclical upturn is occurring.
也可能是极速发展中，即将迎来转折点了呢？
