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  8.    An investor enters a short position in a gold futures contract at $318.60. Each futures contract controls 100 troy ounces. The initial margin is $5,000 and the maintenance margin is $4,000. At the end of the first day the futures price rises to $329.22. Which of the following is the amount of the variation margin at the end of the first day?
  A.    $0
  B.    $62
  C.    $1,000
  D.    $1,062
  與Handbook7.7作比較
  答疑:賣(mài)出黃金期貨合約,所以價(jià)格上升的時(shí)候虧錢(qián)。虧:(329.22-318.60)*100=1062,初始保證金為5000,虧損1062,此時(shí)保證金跌至4000以下,所以需要追加保證金。這道題問(wèn)的是變動(dòng)保證金也就是說(shuō)需要補(bǔ)充回初始保證金的金額;所以追加的變動(dòng)保證金就是虧的金額,即1062。而Handbook中7.7,題目中價(jià)格下跌的時(shí)候賣(mài)出期貨合約是賺錢(qián)的。不用追加保證金。