1. Index Calculation Rules
The USDT-margined contract adopts the corresponding USDT index. To ensure that the spot index price reasonably reflects the fair market price of each cryptocurrency, we select trading pairs from more than five major exchanges for each contract and assign them index weight components. Additionally, we implement an anomaly handling mechanism to maintain stable index fluctuations when a single exchange's price deviates significantly.
2. Spot Index Price Calculation Logic:
a. Real-time retrieval of the latest transaction prices and trading volumes from all index component exchanges for the given cryptocurrency.
b. Exchanges undergoing system maintenance or those without updated transaction prices and volumes within a certain period (each cryptocurrency has different time thresholds) are marked as invalid and excluded from the calculation.
c. Trading pairs quoted in BTC are converted to USDT prices by multiplying them by the SuperEx BTC/USDT index.
d. The number of remaining valid exchanges is assessed:
- If there are three or more, the index is calculated using an equally weighted average of the valid exchange data.
- If there are two, an equally weighted average of the two exchanges is used.
- If there is only one, the price from the remaining valid exchange is used as the index price.