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

September 16th. As per an official announcement, Binance has declared that starting from 16:01 on September 18, 2025 (UTC+8), the funding rate calculation formula for Binance Futures will be updated in the following manner: The Funding Rate (F) = [Premium Index (P) + clamp (Interest Rate - Premium Index (P), 0.05%, -0.05%)] / (8/N), where N represents the funding rate settlement frequency. Moreover, starting from 16:01 on September 18, 2025 (UTC+8), Binance Futures will adjust the mark price by modifying the price every 2 basis from 1 minute to 30 seconds. The specific adjustments are as follows: 1. After the adjustment, for USDT-Margined and Coin-Margined Perpetual Futures: The Mark Price = Median(Price 1, Price 2, Contract Price). Price 2 = Price Index + Moving Average (based on 30 seconds). The Moving Average (based on 30 seconds) is the average of 30 data points within 30 seconds. Data points are calculated every second by taking the average of the buy price and sell price and then subtracting the price index. 2. After the adjustment, for USDT-Margined and Coin-Margined Delivery Futures: The Mark Price = Price Index + Moving Average (based on 30 seconds). The Moving Average (based on 30 seconds) = Moving Average ((Best Bid + Best Ask) / 2 - Price Index), which is calculated every second with a 30-second interval. Data points are calculated every second by taking the average of the buy price and sell price and then subtracting the price index.