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Rachel2019-12-23 22:32:52

老师,请问书本82页第六题答案This situation, particularly a short squeeze, can lead to substantial losses and a suddenly unbalanced exposure if bor-rowing the underlying equity shares becomes too difficult or too costly for the arbitrageur这一段不理解?这种情形怎么产生loss不太明白?能否详细解释一下? The convertible bond arbitrage strategy can lose money due to time decay of the convert-ible bond’s embedded call option during periods of reduced realized equity volatility and/or due to a general compression of market implied volatility levels这一段也不理解?time decay 和call option以及volatility之间怎么会lose money? Convertible arbitrage strategies have performed best when convertible issuance is high (implying a wider choice among convertible securities as well as downward price pressure and cheaper prices这里的issuance is high指什么?括号里implying不理解是什么意思?能否详细解释一下?

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Peter F2019-12-24 17:13:38

同学,你好:1)关键点是 short selling ,这是卖空股票,即先借别人的股票买了赚钱,等借出方需要股票了,再从市场上买入股票,还给借出方,当买回股票的时候,空方都想买了还股票(short squeeze),那么,股票价格会上升,可能超过当时借的时候价格,就会亏钱。
2)convertible bond 的价格等于 普通债券价格 + 期权价格,期权价格 = 内在价值 + time value,内在价值与波动率成正比,波动率下降,内在价值下降,随着时间的流逝(time decay),time value 下降,即如果不行权的话,最终原先的 convertible bond 价格就会变为 普通债券的价格,损失。
3)issuance is high 是指发行量大,发行量大则选择广(wider choice),供给大于需求,则价格向下压力大,价格更便宜。

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