I know you're asking about option speculation strategy. Option speculation strategy can be divided into three categories from the strategic position construction: single option, spread combination and mixed option. According to the applicable market, it can be divided into three categories: long market (think it will go up), short market and shock market. For example, judging that the market will fall, there are several situations:

1, the market is expected to plummet. It is most suitable for buying bears or synthesizing futures shorts with options. The construction cost of the latter is lower than that of the former, but if the market direction is misjudged, that is, when the market rises sharply, the loss risk is uncontrollable.

It is expected that the market will decline slightly. It is most suitable for bear market spread combination, which can be constructed by both call options and put options. The construction cost is very low. If you buy a put option, you may lose money because the expected market decline is small and you can't reach the breakeven point.

2. There is another situation that you can't look up. To put it simply, I think the market will fall, but there is no great certainty that it will. But what is certain is that the possibility of rising is even smaller. This is the best time to sell call options and get royalties.