For options without income assets, it can also be applied to American call options, because it is not advisable for American call options to be executed in advance without income, and the option execution date is also the expiration date, so BS applies American call options. For American bearish, it is not suitable because it can be executed in advance.

For options with income assets, it is only necessary to change the present value of income (that is, to become the underlying securities MINUS the discounted income), and BS is also applicable to European, put and call options. When the underlying assets are profitable, American call options and put options have the possibility of execution, so BS is not applicable.

Extended data:

Precautions:

1. Buying a put option is just the opposite of buying a call option. Put option is the right to sell. When buying put options, the stock market is expected to fall.

2. In the United States, each option contract is 100 shares. Therefore, if the option price is $ 1, the option contract price is $ 100.

3. For S&P; P) Futures options, each contract can be executed as a futures contract. If the option price is $ 1, then $250 will be paid when the futures contract is executed.

4. If you want to buy a put option, the market prospect is bearish and the underlying asset price is expected to fall.

Baidu encyclopedia-put option

Baidu encyclopedia-European option

Baidu Encyclopedia-American Options

Baidu Encyclopedia-Value Interval