II. Index Computation Rules

To ensure the spot index price accurately reflects the spot market price of each token, we have carefully selected the market prices of 3 or more major exchanges as the weighted index constituents for each token. Measures are introduced to handle abnormal situations.

1. Spot Index Price Constituents

Details: https://www.okex.com/markets/index-price-list

2. Spot Index Price Computation

1. The latest price and volume of each index constituent is retrieved from selected exchanges in real time;
2. If the relevant exchange is under maintenance, or if any constituent price/volume has no update for certain time (vary from currency), the constituent data will be temporarily treated as invalid and excluded from index calculation;
3. For trading pairs with BTC as quote currency, the prices will be converted to USD by multiplying the OKEx BTC/USD index;
4. Final calculation depends on the number of exchanges with valid data, details as follows:

• More than 3 exchanges with valid data: apply equally-weighted price average (however, if the price of any exchange deviates more than 3% from the median price of all exchanges, the exchange's price will be bounded within median price * 0.97 and median price * 1.03);
• Only 2 exchanges with valid data: apply equally-weighted price average;
• Only 1 exchange with valid data: its last traded price will be used as the index price directly.