【如何通俗地解释期权的概念和特点？】许哲：小王买了一支股票 A，以 10 元的价格买入的，一直担心股票价格会下跌，小李突然冒出来，拍着胸脯写了张保证书，三个月后，无论股票下跌到何等惨烈的程度，我都愿意以 8 元的价格买你现在手上的股票，骗人是小狗... 详细：
http://weibo.com/1904769205/CxjO6qlbp?type=comment#_rnd1455514796125
https://www.zhihu.com/question/28078723/answer/40688775?utm_campaign=official_account&utm_source=weibo&utm_medium=zhihu&utm_content=answer
http://weibo.com/1904769205/CxjO6qlbp?type=comment#_rnd1455514796125
https://www.zhihu.com/question/28078723/answer/40688775?utm_campaign=official_account&utm_source=weibo&utm_medium=zhihu&utm_content=answer
