1 Put option is also called put option, seller option, put option, put option or knock option. Put option means that the buyer of the option has the right to sell a certain number of the subject matter at the execution price within the validity period of the option contract, but does not undertake the obligation of selling.

2. If the industry is expected to perform well, the profitability of good enterprises in this industry is stronger than that of poor enterprises, which is reflected in the stock price, and the probability of good enterprises rising is greater. If the expectation is wrong, the anti-risk ability of bad enterprises is not as strong as that of good enterprises, and the probability of loss is greater than that of good enterprises. The share price will fall much more than the blue chip.