能不能解释一下这里的考点以及相关的讲义

NO.PZ202208100100000702 问题如下 With regarto the strategy for Company A thFillizola recommen, she is least likely correregarng: A.the expectation of volatility of the unrlying. B.the effective sale priif share prices move lower, to $130. C.the effective sale priif share prices trenhigher th$140. SolutionA is correct. Fillizola is incorreregarng the expectation of volatility of the unrlying comparewith the implievolatility of 21.05%. The recommenstrategy, a coverecall, is appropriate if the expectation is thvolatility of the unrlying will lower ththe implievolatility of 21.05%. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.B is incorrect. Fillizola is correabout the effective sale price. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.C is incorrect. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. 中文解析本题考察的是coverecall。题干大意一个客户拥有2000股公司A的股票，该股票不支付股息，目前定价为139.81美元。但是客户被禁止出售该股票。客户预计股价在未来几个月保持稳定，虽然不能出售，但仍希望获得一些收入。因此Fillizola建议客户卖出20份的到期时间在2020年二月份的看涨期权，这个看涨期权的执行价格是140美元，期权费是5.4美元，隐含波动率是21.05%。由于该客户本身持有股票，如果再short call，那么构成了coverecall策略。因为期权与隐含波动率成正相关关系，short option在这里short call，意味着是看跌波动率的，即预测市场是平稳的，所以表述中关于波动率的表述（预测股价波动率将会高于21.05%）是错误的，选A。当股价高于140美元时，long call的一方会行权，那么我们需要将手里的股票按照140美元的价格卖给对手方，但是一开始卖出call option获得期权费是5.4美元，因此有效的卖出价格是145.4美元，C正确；如果股价是130美元，那么long call的一方不会行权，如果我们要卖出股票的话，只能按照130美元卖出，但是short call获得了5.4美元的期权费，因此有效的卖出价格是135.4美元。B正确。 老师，这边我想确认几个问题1.现在我手上有股票，然后建议加上一个short call。此时，\"strategy\"指的是short call, 还是(stock+short call)这个整体？此时，\"position\"指的是short call, 还是(stock+short call)这个整体？根据解析，我初步判断\"strategy\"和\"position\" 指的都是(stock+short call)这个整体，也就是coverecall, 不知道我理解的对不对？2.如果expectevolatility implievolatility, 说明未来波动率会上升对吗？这种情况下，就是应该long option才能赚钱对吧？

NO.PZ202208100100000702 问题如下 With regarto the strategy for Company A thFillizola recommen, she is least likely correregarng: A.the expectation of volatility of the unrlying. B.the effective sale priif share prices move lower, to $130. C.the effective sale priif share prices trenhigher th$140. SolutionA is correct. Fillizola is incorreregarng the expectation of volatility of the unrlying comparewith the implievolatility of 21.05%. The recommenstrategy, a coverecall, is appropriate if the expectation is thvolatility of the unrlying will lower ththe implievolatility of 21.05%. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.B is incorrect. Fillizola is correabout the effective sale price. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.C is incorrect. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. 中文解析本题考察的是coverecall。题干大意一个客户拥有2000股公司A的股票，该股票不支付股息，目前定价为139.81美元。但是客户被禁止出售该股票。客户预计股价在未来几个月保持稳定，虽然不能出售，但仍希望获得一些收入。因此Fillizola建议客户卖出20份的到期时间在2020年二月份的看涨期权，这个看涨期权的执行价格是140美元，期权费是5.4美元，隐含波动率是21.05%。由于该客户本身持有股票，如果再short call，那么构成了coverecall策略。因为期权与隐含波动率成正相关关系，short option在这里short call，意味着是看跌波动率的，即预测市场是平稳的，所以表述中关于波动率的表述（预测股价波动率将会高于21.05%）是错误的，选A。当股价高于140美元时，long call的一方会行权，那么我们需要将手里的股票按照140美元的价格卖给对手方，但是一开始卖出call option获得期权费是5.4美元，因此有效的卖出价格是145.4美元，C正确；如果股价是130美元，那么long call的一方不会行权，如果我们要卖出股票的话，只能按照130美元卖出，但是short call获得了5.4美元的期权费，因此有效的卖出价格是135.4美元。B正确。 A is correct. Fillizola is incorreregarng the expectation of volatility of the unrlying comparewith the implievolatility of 21.05%. The recommenstrategy, a coverecall, is appropriate if the expectation is thvolatility of the unrlying will lower ththe implievolatility of 21.05%.文章前后都没出现高于或者低于21.05%，也不知道21.05%是怎么算的，对解题思路有点摸不透

NO.PZ202208100100000702 问题如下 With regarto the strategy for Company A thFillizola recommen, she is least likely correregarng: A.the expectation of volatility of the unrlying. B.the effective sale priif share prices move lower, to $130. C.the effective sale priif share prices trenhigher th$140. SolutionA is correct. Fillizola is incorreregarng the expectation of volatility of the unrlying comparewith the implievolatility of 21.05%. The recommenstrategy, a coverecall, is appropriate if the expectation is thvolatility of the unrlying will lower ththe implievolatility of 21.05%. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.B is incorrect. Fillizola is correabout the effective sale price. If the share priis $130, the client will sell $130 anher effective sale priis $130 + $5.40 = $135.40.C is incorrect. Fillizola is correabout the effective sale priif the stois above $140. The stogets calleaw$140, anthe effective sale priis $140 + $5.40 = $145.40. 中文解析本题考察的是coverecall。题干大意一个客户拥有2000股公司A的股票，该股票不支付股息，目前定价为139.81美元。但是客户被禁止出售该股票。客户预计股价在未来几个月保持稳定，虽然不能出售，但仍希望获得一些收入。因此Fillizola建议客户卖出20份的到期时间在2020年二月份的看涨期权，这个看涨期权的执行价格是140美元，期权费是5.4美元，隐含波动率是21.05%。由于该客户本身持有股票，如果再short call，那么构成了coverecall策略。因为期权与隐含波动率成正相关关系，short option在这里short call，意味着是看跌波动率的，即预测市场是平稳的，所以表述中关于波动率的表述（预测股价波动率将会高于21.05%）是错误的，选A。当股价高于140美元时，long call的一方会行权，那么我们需要将手里的股票按照140美元的价格卖给对手方，但是一开始卖出call option获得期权费是5.4美元，因此有效的卖出价格是145.4美元，C正确；如果股价是130美元，那么long call的一方不会行权，如果我们要卖出股票的话，只能按照130美元卖出，但是short call获得了5.4美元的期权费，因此有效的卖出价格是135.4美元。B正确。 老师，没看懂这题。题目不是说客户不想卖股票，只想赚一点期权费吗？although not wishing to sell, still wants to generate some income. 如果股价是130美元，那么long call的一方不会行权，然后short call获得了5.4美元的期权费，这不就达到了客户的目的? 为什么还要计算它的有效卖出价格135.4美元？effective sale price指的是卖出股票获得的总现金流入？