What is said upstairs is wrong. At present, there are only two choices in China, one is the foreign exchange option of the bank, and the other is the stock warrant. The so-called option is the right to buy or sell something at an agreed price in the future by paying the option fee, so there are two kinds: bullish and bearish. Because the option fee is much less than the actual transaction fee, it can enlarge the profit and loss. You can also choose to close your position before maturity. Pay attention to whether you are profitable or losing money on the exercise date. The option fee is non-refundable. This is different from margin, so if the timing of intervention is not appropriate, even if you make a profit, you may still lose money because the amount is less than your option fee.