NO.PZ2020021205000012
问题如下：
"Delta hedging a short position in a call option is a 'buyhigh, sell-low' trading strategy." Explain this statement.
解释：
Delta hedging involves buying 6 shares for each option sold, where 6 is the delta of a long position in the option. As the share price rises, delta increases and more shares have to be bought. As the share price falls, delta decreases and shares have to be sold. The trader is therefore always buying after a price increase and selling after a price decrease.
老师您好，请您帮我看看我理解的对吗：对于call来说，s越高，delta越大，需要的对冲标的越多方；对于put来说，s越越低，delta绝对值越大，需要的对冲标的越多。short call要long s，s上涨就需要long更多stock，long call，要short stoct，s上涨就要，short更多stock；longput要要long st，s下跌就要long更多st，shortput要short st，s下跌要short更多st
