老师,请问这个statement1如何争取解读:这个所谓的deltas of the stock + call portfolio and the stock + put portfolio are bearish,指的是无论现货还是option全部是short头寸?
这是我根据原版书回答推论出来的:The delta of her short position is –500. The call delta is 500 × 0.439 = 219.5. The delta of the combined position is –280.5. The short put delta is 0.199.5 = 500 × –(–0.399). The delta of the combined position is –300.5. Thus, both positions are bearish, but the put delta position is more bearish.