Binance Futures to End Last Price Protected Period for HUSDT Perpetual Contract and Shift Mark Price Rules

According to the announcement from Binance, Binance Futures will end the Last Price Protected (LPP) period for the USDⓈ-Margined HUSDT Perpetual Contract, with the Mark Price set to transition from the LPP mechanism to the standard Mark Price calculation at 2026-06-18 09:45 (UTC). Binance said the transition period may take up to 3 hours, depending on price volatility and the availability of a stable index price. The exchange stated that the change will be implemented gradually using a mark price smoothing process intended to reduce sudden price movements and support price stability during the transition. Binance added that trading functionality will not be affected during the transition period, and that open orders and positions will not be cancelled.

Heading: Mark Price Calculation

After the LPP period ends, Binance said the Mark Price for the contract will be calculated using the formula Mark Price = Median (Price 1, Price 2, Contract Price). The announcement noted that the formulas for Price 1 and Price 2 are referenced under the Mark Price and Price Index framework for USDⓈ-Margined Futures.

Heading: Funding Rate Changes

Binance said that after the LPP period ends, the funding rate will follow standard perpetual futures funding rate rules. The capped funding rate will be adjusted from +0.005% / -0.005% to 2.00% / -2.00% at 2026-06-18 09:45 (UTC). The notice listed a schedule showing the maximum funding rate at 2026-06-18 08:00 (UTC) as +0.005% / -0.005%, and at 2026-06-18 12:00 (UTC), 2026-06-18 16:00 (UTC), and 2026-06-18 20:00 (UTC) as +2.000% / -2.000%. Binance also said the funding interval will shift from every four hours to every one hour when the previous funding rate settlement reaches +2.00% / -2.00%.