[求助] CFA L1 Asset Valuation 问题请教

Schweser June 08 Exam 2 Morning

88. If a price index has been increasing over the past two months, where would the 30-day moving-average lie relative to the current index level?

A. It would lie on it.

B. It would lie above it.

C. It would lie below it.

D. Cannot be determined without additional information.

Why is the answer C?  What is the 30-day moving-average?  I cannot find it.

If the market has been upward sloping, the average will below the current price index.

Just like the arithmetic mean of a set of numbers. Just my opinion~~

Fighting , three days remaining.

Thank you, yankee_sailor.