Binance Futures to Update USDT Funding Rate Formula and Shift Mark Price to 30‑Second Moving Average on Sept 18, 2025

Binance Futures announced an operational update effective 16:01 on September 18, 2025 (UTC+8), revising the funding rate calculation to: F = [Premium Index (P) + clamp(Interest Rate – P, 0.05%, -0.05%)] / (8/N), where N denotes the funding rate settlement frequency. Concurrently, the exchange will tighten the mark price cadence by shifting the price sampling window from 1 minute to a 30-second moving average. For USDT-Margined and Coin-Margined Perpetuals, the mark price becomes Median(Price 1, Price 2, Contract Price), with Price 2 = Price Index + 30-second moving average (computed from 30 one-second data points using the mid-price minus the price index). For USDT-Margined and Coin-Margined Delivery Futures, mark price will equal the Price Index plus the same 30-second moving average methodology.