问题
单项选择题
An investor sold ten March stock index futures contracts. The multiplier on the contract is 250. At yesterday’s settlement price of 998.40 the margin balance in the account was computed as $ 86450. Today the index future had a settlement price of 1000.20. The new margin amount is:（）
A. $90950.
B. $86000.
C. $81950.
答案
参考答案：C
解析：
86450-10×250×(1000.2-998.4)=$81950.