Bianca discount rate is only applicable to currency standard, not to spot, USDT contract and other products. You can enjoy the discount rate within 30 days. If you leave during this period, the discount rate will be cancelled.

1. The key function of capital interest rate is to narrow the price difference between the futures market and the corresponding spot market. In this case, it is a BTC/USDT transaction pair.

2. Capital ratio (F)= premium index (P)+ clamp (0.03%- premium index (P), 0.05% to -0.05%)

3. The interest rate of funds is calculated every 8 hours. Only when positions are held in any direction in the current time interval will the corresponding capital expenses be charged or paid. If you don't have a position, you won't be charged or paid the capital fee.

4. When the interest rate of funds is positive, according to the nominal value of the contract, the bulls need to pay the corresponding amount to the bears; When the interest rate of funds is negative, according to the nominal value of the contract, the bears must pay the corresponding amount to the bulls. .

Calculation formula of settlement funds

Settlement funds = face value of position × interest rate of funds

The interest rate of funds consists of two parts, the interest rate part and the premium part. The latter, in particular, explains why the price of permanent contracts tends to converge with the trend of basic prices.

There may be a significant difference between the permanent contract price and the marked price. In this case, the premium index will be used to promote the trend convergence of these two prices.

1. There are two hard-top restrictions on the capital ratio to ensure that leverage can be achieved and promote stable market behavior. Currency security does not charge any fees in the process of capital interest rate transfer, but directly transfers funds between long and short parties. Because the unrealized profit and loss of positions is the main reason for forced liquidation (strong leveling), and the maximum leverage ratio of perpetual contracts can reach 20 times, it is very important to accurately calculate the profit and loss of positions to avoid unnecessary strong leveling.

2. The intrinsic value of a contract is the core foundation of a perpetual contract, and the price index is obtained by referring to the weighted average of the prices in major trading markets, and the price index is the main component of the marked price.

Price index is a comprehensive price index obtained by referring to the prices of a basket of major spot trading markets and weighted average of their trading volume. The reference trading markets include: Bitfinex, Coin Security, Huobi, Okex, Bittrex and HitBTC. Assuming that our tentative price index is the spot price, we will use it to calculate the marked price (used to calculate the floating profit and loss of each trading pair). The actual profit and loss of the account shall be subject to the market price at the time of liquidation.