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cst6666 · 2024年05月25日

关于margin

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NO.PZ2023040301000027

问题如下：

You decide to sell short 100 shares of Charlotte Horse Farms when it is selling at its yearly high of 56. Your broker tells you that your margin requirement is 45% and that the commission on the purchase is $155. While you are short the stock, Charlotte pays a $2.50 per share dividend. At the end of one year, you buy 100 shares of Charlotte at 45 to close out your position and are charged a commission of $145. What is your rate of return on the investment?

选项：

A.

20.56%

B.

22.65%

C.

18.56%

解释：

Profit on a short sale = Begin value — Ending value — Dividends( Interest)— Trans. costs

ü Beginning value of investment = $56.00 x 100 =$5,600 (Sold under a short sale arrangement)

ü Ending value of investment = $45.00 x 100=$4,500

ü Transaction costs= $155 + $145 =$300.00

ü Dividends = $2.50 x 100 shares =$250.00

ü Profit= $5,600 — $4,500 — $250 — $300= $550.00

Ø Initial investment = Margin requirement + Commission = (0.45 x $5,600) + $155= $2,520 + $155= $2,675

The rate of return on your investment is 20.56%=$550.00 / $2,675

我稍微有点不明白margin

这儿的margin 45% 是为什么算入t0的本金呢？是指 45%的short sell 的share 是investor本人的share 是吗？


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王园圆_品职助教 · 2024年05月25日

同学你好，short sell是指投资者跟一个股票拥有者借入该股票，然后在市场上卖出的行为——所以投资者自己是没有这个股票的

45%的这个margin 助教在上面一个题目的讲解里已经解释了，这是broker为了防止股票突然价格大幅上涨所要求投资者初始必须冻结的资金，如果股票价格突然从56开始往上暴涨，那投资者作为卖空者就会开始亏损，没有任何保证金冻在那里的话，broker就不能保证有钱能够买回这个股票从而平仓了，所以必须冻一部分投资者的钱应对这种情况——你可以看作初始投资投资者必须有这么多钱broker才会让投资者做这个卖空的交易，所以这是一种初始的投资

同学我看你是8月份考试的，还有一定的时间，建议还是尽量听一下李老师关于long position和short position的基础班讲解，尤其是卖空，原理上还是和一般买入股票很不同的，老师课程讲解会比较详细，助教的文字表述肯定是比不上老师讲解的哦

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NO.PZ2023040301000027问题如下 You ci to sell short 100 shares of Charlotte Horse Farms when it is selling its yearly high of 56. Your broker tells you thyour margin requirement is 45% anththe commission on the purchase is $155. While you are short the stock, Charlotte pays a $2.50 per share vin the enof one year, you buy 100 shares of Charlotte 45 to close out your position anare chargea commission of $145. Whis your rate of return on the investment? 20.56%B.22.65%C.18.56% Profit on a short sale = Begin value — Enng value — vin( Interest)— Trans. costsü Beginning value of investment = $56.00 x 100 =$5,600 (Solunr a short sale arrangement)ü Enng value of investment = $45.00 x 100=$4,500ü Transaction costs= $155 + $145 =$300.00ü vin = $2.50 x 100 shares =$250.00ü Profit= $5,600 — $4,500 — $250 — $300= $550.00Ø Initiinvestment = Margin requirement + Commission = (0.45 x $5,600) + $155= $2,520 + $155= $2,675The rate of return on your investment is 20.56%=$550.00 / $2,675 vin这个vin是投资者收到的分红吗，为什么收益里面不包括反而要扣除呢

2024-08-22 11:22 1 · 回答

NO.PZ2023040301000027 问题如下 You ci to sell short 100 shares of Charlotte Horse Farms when it is selling its yearly high of 56. Your broker tells you thyour margin requirement is 45% anththe commission on the purchase is $155. While you are short the stock, Charlotte pays a $2.50 per share vin the enof one year, you buy 100 shares of Charlotte 45 to close out your position anare chargea commission of $145. Whis your rate of return on the investment? 20.56% B.22.65% C.18.56% Profit on a short sale = Begin value — Enng value — vin( Interest)— Trans. costsü Beginning value of investment = $56.00 x 100 =$5,600 (Solunr a short sale arrangement)ü Enng value of investment = $45.00 x 100=$4,500ü Transaction costs= $155 + $145 =$300.00ü vin = $2.50 x 100 shares =$250.00ü Profit= $5,600 — $4,500 — $250 — $300= $550.00Ø Initiinvestment = Margin requirement + Commission = (0.45 x $5,600) + $155= $2,520 + $155= $2,675The rate of return on your investment is 20.56%=$550.00 / $2,675 老师，我是这么理解的期初买进给了1笔155的佣金，期末应该是买回股票归还，减去1笔145的佣金，为什么期末还需要减去1个买进股票155的佣金？

2024-06-19 09:55 1 · 回答

NO.PZ2023040301000027问题如下 You ci to sell short 100 shares of Charlotte Horse Farms when it is selling its yearly high of 56. Your broker tells you thyour margin requirement is 45% anththe commission on the purchase is $155. While you are short the stock, Charlotte pays a $2.50 per share vin the enof one year, you buy 100 shares of Charlotte 45 to close out your position anare chargea commission of $145. Whis your rate of return on the investment? 20.56%B.22.65%C.18.56% Profit on a short sale = Begin value — Enng value — vin( Interest)— Trans. costsü Beginning value of investment = $56.00 x 100 =$5,600 (Solunr a short sale arrangement)ü Enng value of investment = $45.00 x 100=$4,500ü Transaction costs= $155 + $145 =$300.00ü vin = $2.50 x 100 shares =$250.00ü Profit= $5,600 — $4,500 — $250 — $300= $550.00Ø Initiinvestment = Margin requirement + Commission = (0.45 x $5,600) + $155= $2,520 + $155= $2,675The rate of return on your investment is 20.56%=$550.00 / $2,675 155的佣金，为什么放在期末计算而不放在期初结算？

2024-06-16 16:00 1 · 回答

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2024-05-25 17:01 1 · 回答