a secured call option is a call option with secured nature. A long call option refers to buying a call option, and a short call refers to selling a call option. Put option bulls refer to buying put options, and bears refer to selling put options. The difference between options and futures is that the option expires by an option, that is, it can be traded or not. If you don't close the deal, you will lose the option fee.

In stock index futures trading, the positions held by investors after buying stock index futures contracts are called long positions, referred to as long positions for short; The positions held after selling stock index futures contracts are called short positions, referred to as short positions. Investors who hold long positions think that the price of stock index futures contracts will rise, so they buy; On the contrary, investors who hold short positions think that the price of stock index futures contracts will fall in the future, so they sell them.

Relationship between call and put:

For call and put transactions, they are not buyers and sellers of a certain transaction. Only the buyer and seller of the put right and the buyer and seller of the call right are the opposite sides of a transaction. There is no necessary connection between the buyers and sellers of call options and put options.

in addition to the two main forms of call right and put right, call right also has two-way options. The buyer of two-way options can buy a certain amount of certain assets from the option seller at the agreed price in a certain period of time in the future, and the call right can also sell a certain amount of certain assets to the option seller at the same price. The call right is the surplus use of the call right and the put right at the same price.