三心哥，把前面你写的怎么建仓 BA的贴子提上来问一下。

Using ratio put spread 200-185, and butterfly 185-175-165, the results are as follows. Looks like the cost didn't further go down from 185 to 175. What is the point of using this butterfly if anticipating price drop won't be further away from 175?

 

Scenario	BA Close	Shares Acquired	Option Profit	Total Cash Out	Avg Cost / Share	Notes
1	> $200	0	$0	$0	–	No assignment
2	$185–$200	0	$500–$1,500	$0	–	Take profit
3	$185	100	$1,500	$18,500 – 1,500 = 17,000	$170.00	1 assigned put
4	$175	300	$2,500	$53,500 – 2,500 = 51,000	$170.00	Peak assignment
5	$165	300	$3,500	$53,500 – 3,500 = 50,000	$166.67	Lower cost due to higher put profit
6	$155	300	$4,500	$53,500 – 4,500 = 49,000	$163.33	Risk flattened due to 165 long put