单选题 Which of the following statements about the futures market is most accurate?

A、 Speculators trade to reduce some preexisting risk exposure.
B、 If a trader"s account falls below the maintenance margin level they have three days to bring it back up to the maintenance margin level.
C、 Open interest is the number of futures contracts for which delivery is currently obligated.

【正确答案】 C

【答案解析】Open interest is the number of contracts currently in existence. Speculators take risk for return. You must bring the margin account up to the initial level by the next day"s opening.