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Drink H · 2020年03月01日

问一道题:NO.PZ2020020601000017 [ FRM I ]

问题如下:

A trader shorts 100 shares when the price is USD 50. The initial margin and maintenance margin are 150% and 125%. What is the initial margin required? How high can the share price go before further margin is required? (Ignore interest payments.)

解释:

The trader is initially required to contribute USD 2,500 in addition to the USD 5,000 obtained from selling the shares, creating a margin balance of USD 7,500. If the USD share price rises to X, the maintenance margin becomes 100 * 1.25X = 125X. This is greater than the 7,500 margin balance when X > 7,500/125, that is, when X > 60.

这题李老师课上也讲过,我还是不理解
1 个答案

品职答疑小助手雍 · 2020年03月01日

同学你好,initial margin直接就5000*150%了,7500.

maintenance margin那个是和期货不一样的,刚才我听了李老师讲的,感觉。。。我打字不太可能比他讲的更详细了啊,要不你再去听下那个题的讲解,哪个点不明白的话再来问一下。

Drink H · 2020年03月02日

我明白了,我没有和期货的保证金区分开。谢谢了

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NO.PZ2020020601000017 问题如下 A trar shorts 100 shares when the priis US50. The initimargin anmaintenanmargin are 150% an125%. Whis the initimargin require How high cthe share prigo before further margin is require (Ignore interest payments.) The trar is initially requireto contribute US2,500 in aition to the US5,000 obtainefrom selling the shares, creating a margin balanof US7,500. If the USshare pririses to X, the maintenanmargin becomes 100 * 1.25X = 125X. This is greater ththe 7,500 margin balanwhen X 7,500/125, this, when X 60. 6250只是股价在50情况下的maintenanmargin,目的是为了告诉你maintenanmargin 是125% 为了后面的计算。 而initimargin才是你的margin balance,可以想成是你账户里的钱。但同时因为有100 shares 是需要还回去的。 题目问的是在不追缴保证金的前提下(用现有7500 margin balance)可以允许stock涨到多少钱(因为是short方)。所以用margin balan7500 / 125% 算出最高允许stock价值(符合mantntenanmargin的125%要求),再除以100算出每股价格60, 这就是在不被margin call前提下,股票最高能到的价格。

2024-03-01 13:02 1 · 回答

NO.PZ2020020601000017 问题如下 A trar shorts 100 shares when the priis US50. The initimargin anmaintenanmargin are 150% an125%. Whis the initimargin require How high cthe share prigo before further margin is require (Ignore interest payments.) The trar is initially requireto contribute US2,500 in aition to the US5,000 obtainefrom selling the shares, creating a margin balanof US7,500. If the USshare pririses to X, the maintenanmargin becomes 100 * 1.25X = 125X. This is greater ththe 7,500 margin balanwhen X 7,500/125, this, when X 60. 维持保证金不应该是100*50*125%=6250吗?50+(7500-6250)/100=62.5 老师,我这么计算哪错了?谢谢。

2023-02-01 14:39 1 · 回答

听了李老师讲的 真的不明白 维持保证金不应该是100*50*125%=6250吗?为啥他讲的维持保证金是个变量 我的算法7500-6250=1250 100*(50-X)= -1250 得出X=62.5

2020-08-13 11:08 2 · 回答