At present, the stock index futures margin introduced in China is 15% of the contract value in May and June, and 18% of the contract value in September and June.

Therefore, if you have 500,000 yuan in your account, assuming that the current point is 3,000 points, you need to pay a deposit of 1 5%, that is,135,000 yuan, if you buy contracts in May and June. If it goes up by another 50 points, it will reach 3050 points. So your current income is:

3050*300-(3000*300)= 15000

In other words, you spent135,000 yuan to do a business of 900,000 yuan and earned150,000 yuan. That's what leverage means.