NO.PZ2020020601000015
问题如下：
A trader contacts a broker to enter into a futures contract to purchase 5,000 bushels of wheat for 600 cents per bushel. The initial margin is USD 3,000, and the maintenance margin is USD 2,000. Under what circumstance is the trader required to provide more margin? How much mar-gin is required? Under what circumstances can USD 500 be withdrawn from the margin account?
选项：
解释：
The trader is required to provide more margin if more than USD 1,000 is lost from the margin account. This will happen if the price of wheat falls by more than 20 cents because variation margin will then have reduced the margin balance by more than 5,000 * 20 cents = USD 1,000. The trader is required to bring the balance in the margin account up to the initial margin level of USD 3,000. USD 500 can be withdrawn from the margin account if the price rises by 10 cents or more (5,000 * 610 cents = USD 30,500, which is USD 500 more than the required initial margin of USD 30,000).
题干中是Purchase futures
Under what circumstances can USD 500 be withdrawn from the margin account?的答案中的价格上涨10美分，应该是价格下降吧？
USD 500 can be withdrawn from the margin account if the price rises by 10 cents or more (5,000 * 610 cents = USD 30,500, which is USD 500 more than the required initial margin of USD 30,000).
谢谢老师解答。
