NO.PZ2019092801000005
问题如下:
Yankel Stein is the chief investment officer of a large charitable foundation based in the United States. Although the foundation has significant exposure to alternative investments and hedge funds, Stein proposes to increase the foundation’s exposure to relative value hedge fund strategies. As part of Stein’s due diligence on a hedge fund engaging in convertible bond arbitrage, Stein asks his investment analyst to summarize different risks associated with the strategy.
Describe how each of the following circumstances can create concerns for Stein’s proposed hedge fund strategy:
i.Short selling
ii.Credit issues
iii.Time decay of call option
iv.Extreme market volatility
解释:
Short selling:股票所有者可能希望他/她的股票在可能不合时宜的时间归还,这可能会导致空头挤压,如果借入基础股票变得太困难或对套利者来说成本太高,则可能导致重大损失和突然不平衡的风险敞口。
Credit issues:指的是convertible bond会面临信用风险,信用风险得大小会影响CB的price,我们这个策略成功的前提就是股债同涨同跌,但是当发生信用风险的时候,股票和债券之间价格的关系就会变化,那么策略就有可能不成功。
Time decay of call option:由于可转换债券的嵌入式看涨期权在已实现股票波动率降低期间的时间衰减和/或由于市场隐含波动率水平的普遍压缩,可转换债券套利策略可能会亏损。大概意思是说可转债中内嵌的call随着时间的流逝,call的价值会逐渐降低,所以如果市场波动一直是不温不火甚至是波动下降的话,等到call到期,这个策略就失败了。
Extreme market volatility:convertible bond arbitrage我们的初衷是想让让本被低估CB回到正常的价值。同时利用债券的凸性。如果波动率极度上升可能会带来一个问题,债券信用风险会上升,投资者会考虑发债人是否有能力还债,毕竟CB本质还是一个债,导致市场情绪波动CB会大跌(虽然整体组合是delta neutral了,但单个CB还是会跌,只是由于做空stock赚回来。)。投资者一看在CB大跌,会着急,纷纷要求赎回,在还没有恢复正常的价值时,HF manager就只能被迫在亏损的时候平仓。所以极度波动对CB并不好。
老师 没太看懂四的解释