[Binance Options to Enforce Self-Trade Prevention (STP) Functionality for All Users] According to the official announcement, Binance will enforce the Self-Trade Prevention (STP) functionality for all Binance Options users starting from 14:00 (UTC+8) on March 19, 2026. With this update, STP will cover spot, margin, futures, and options trading on the Binance platform. Please note that the system update will begin at 14:00 (UTC+8) on March 19, 2026, and is expected to last for 1 hour to ensure a smooth transition. The STP functionality is designed to prevent unintentional self-trading by API users, ensure compliance, and maintain the integrity of market data, saving users from unnecessary fees. The STP function will automatically block the execution of orders that would result in self-trading. There are three STP modes available, and the default STP mode for all Binance Options orders will be 'EXPIRE_MAKER'.