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发表于 2012-3-31 17:10
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It is April 15, and a trader is entered into a short position in two soybean meal futures contracts. The contracts expire on August 15, and call for the delivery of 100 tons of soybean meal each. Further, because this is a futures position, it requires the posting of a $3,000 initial margin and a $1,500 maintenance margin per contract. For simplicity, however, assume that the account is marked to market on a monthly basis. Assume the following represent the contract delivery prices (in dollars per ton) that prevail on each settlement date:April 15 (initiation) | 173.00 | May 15 | 179.75 | June 15 | 189.00 | July 15 | 182.50 | August 15 (delivery) | 174.25 |
What is the equity value of the margin account on the May 15 settlement date, including any additional equity that is required to meet a margin call?
Use the following steps to calculate the margin account balance as of May 15.
At initiation: (Beginning Balance, April 15)
Initial margin × number of contracts = 3,000 × 2 = 6,000
Maintenance margin × number of contracts = 1,500 × 2 = 3,000
As of May 15: (Ending contract price per ton − beginning contract price per ton ) × tons per contract × # contracts = (179.75 − 173.00) × 100 × 2 = 1,350
Since the trader is short, this amount is subtracted from the beginning margin balance, or 6,000 − 1,350 = 4,650.
Based on the May 15 settlement date, which of the following is most accurate? A)
| Since the equity value of the margin account is above the initial margin, the trader can withdraw $1,350. |
| B)
| Since the equity value of the margin account is below the maintenance margin, a variation margin is called to restore the equity value of the account to it's initial level. |
| C)
| No margin call or disbursement occurs. |
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As of May 15, the margin balance is $4,650 (see solution to previous question). Since this is below the initial margin of $6,000 (both contracts), but still above the maintenance margin of $3,000, (for both contracts) no action is required.
There are three types of margin. The first deposit is called the initial margin. Initial margin must be posted before any trading takes place. Initial margin is fairly low and equals about one day’s maximum price fluctuation. The margin requirement is low because at the end of every day there is a daily settlement process called marking-the-account-to-market. In marking-to-market, any losses for the day are removed from the trader’s account and any gains are added to the trader’s account. If the margin balance in the trader’s account falls below a certain level (called the maintenance margin), the trader will get a margin call and have to deposit more money (called the variation margin) into the account to bring the account back up to the initial margin level. |
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