The ratio of 300etf options refers to the percentage that the price of 300etf options needs to rise (fall) to make the call (put) option holders break even.
For example, when the price of 300etf is 3 yuan/share, the call option premium with exercise price of 3.5 yuan/share is 900 yuan/share, and the ratio of call option breakeven point is 3.5+0.09 = 3.59 yuan/share. Secondly, calculate the percentage of decline when the current target price reaches the breakeven point: (3.59-3)/3× 100%.
When the price of 300etf is 2.55 yuan/share, the execution price is 2. The premium of 6 yuan/share call option is 900 yuan/share, and the proportion of put option: firstly, calculate the breakeven point of this option as 2.6-0.09 = 2.5 1 yuan/share (exercise price-premium), and then calculate the percentage of decline when the current target price reaches breakeven point: (2.55-2.51)/2.50.