When financing to buy securities in the securities market, investors need to pay their own funds. 2. The down payment also refers to the money deposited by one or both parties in the other party or a third party to ensure the performance of the contract. There are two popular forms of deposit in real economic life: one is the deposit that the parties to a contract ask the other party to provide in order to ensure the realization of their creditor's rights. For example, in the construction contract, when the project is settled, the construction party will keep part of the project payment payable as warranty money to ensure the performance of the construction party's warranty obligations; In case of engineering quality problems, if the construction party refuses to repair, the construction party can use the warranty money to repair itself or ask a third party to repair it. Another form of deposit is the deposit paid by both parties to a third party (usually a notary office) recognized by * * * to ensure the performance of their respective obligations when the contract is established. Neither party may collect the deposit before all its contractual obligations are fulfilled. If one party breaches the contract, the other party can get liquidated damages or compensation from the deposit.

It can be seen that the deposit also has the same function as the deposit to realize the guarantee contract. However, as far as the function of deposit is concerned, it is not limited to the provisions of the General Principles of Civil Law and the Guarantee Law of our country, but only takes deposit as a guarantee for debt performance. In practice, the parties can agree on the function of the deposit by themselves. According to the purpose of payment, the deposit can be used as the guarantee for the conclusion of the contract, the conditions for the contract to take effect, the proof of the establishment of the contract or the price for the termination of the contract. Therefore, the deposit not only has the function of guaranteeing the performance of debts, but also has the functions of concluding contracts, concluding contracts, proving contracts, maintaining contractual relations and preventing contracts from being broken at will. These functions do not apply to margin.

It should also be noted that there is no limit to the time and amount of deposit retention or withdrawal. Both parties can agree on their own before and during the performance of the contract; The amount of deposit can be equal to the amount of debt, unlike the total amount of deposit, which must not exceed 20% of the total price of the main contract and must be paid when the contract is agreed or before the contract is signed.

Futures trading uses leverage, just like stock index futures. The so-called leverage actually refers to the margin system. For example, one point in stock index futures is 300 yuan, so for example, the current Shanghai and Shenzhen 300 Index is 3 100, and the normal trading price should be 3 100 *. 300=9300000, but the stock index futures adopt the margin system. The margin ratio of stock index is not clearly defined now. We assume that the margin ratio is 10%, so we use 9300000*. 10%=930000 single-handedly, thus forming a leverage effect. Use 10% of the capital to operate 100% of the goods. For example, if you make more orders at 3 100, then when it rises to 3,200, you close your position and your profit is (3,200-3100).