05/06/2015
A futures trader takes a long position of 10 contracts. The initial margin requirement is $10 per contract, and the maintenance margin requirement is $7 per contract. She deposits the required initial margin on the trade date. On Day 3, her margin account balance is $40. On Day 4, variation margin is closest to:
A. $30.
B. $60.
C. $70.
解:呢題講MARKET OPERATION.以美國既慣性,開倉時要有足夠既INITIAL MARGIN,而且每當個BALANCE跌穿MAINTENANCE MARGIN,個INVESTOR要補倉去返INTITIAL MARGIN既水平. LONG 10張CONTRACTS,每張要10蚊MARGIN 即係一開倉就要放100蚊去ACCOUNT到.DAY 3 個ACCOUNT得返40蚊即係跌左,佢要補倉到INITIAL MARGIN既水平,所以答案係100-40,即係60蚊. B