CEX will adjust the contract funding rate calculation formula and mark price.

On September 16, according to the official announcement, CEX announced that starting from September 18, 2025, 16:01 (UTC+8), the funding rate calculation formula for CEX contracts will be updated as follows: funding rate (F) = [average premium index (P) + clamp (interest rate - premium index (P), 0.05%, -0.05%)] / (8/N), where N is the funding rate settlement frequency. In addition, starting from September 18, 2025, 16:01 (UTC+8), CEX contracts will adjust the mark price, changing the basis of price 2 from 1 minute to 30 seconds, with the specific adjustments as follows: 1. For U-based and coin-based perpetual futures after adjustment: mark price = Median( price 1, price 2, contract price). Price 2 = price index + moving average (30 seconds basis). The moving average (30 seconds basis) is the average of 30 data points within 30 seconds. Data points are calculated once per second, with the calculation method being to take the average of the bid price and the ask price, then subtract the price index. 2. For U-based and coin-based delivery contracts after adjustment: mark price = price index + moving average (30 seconds basis). Moving average (30 seconds basis) = moving average (( bid price + ask price) / 2 - price index), calculated at 30-second intervals, once per second. Data points are calculated once per second, with the calculation method being to take the average of the bid price and the ask price, then subtract the price index.