In a significant development, Hyperliquid has unveiled the fee structure for its outcome tokens, which are set to underpin prediction market-style trading on the platform, hinting at an imminent mainnet launch. The prediction market sector has witnessed explosive growth, with trading volumes soaring over 300% in 2025 to reach $63.5 billion, and Hyperliquid is strategically building infrastructure to rival established players like Kalshi and Polymarket.
A key aspect of the fee structure is that initiating a position incurs no cost, with fees only applicable when closing or settling a trade. The structure outlines six distinct scenarios, including minting, trading, burning, and settlement.
Traders utilizing Hyperliquid's aligned quote tokens are offered preferential rates, with taker fees reduced by 20% and maker rebates increased by 50% compared to standard rates. The comprehensive fee formula has been made available for developers. The introduction of outcome tokens, as part of the HIP-4 upgrade, will enable users to trade binary contracts on real-world events, in addition to Hyperliquid's existing perpetuals and spot positions, all within a single account, as the platform seeks to compete with the likes of Polymarket. Notably, Hyperliquid's previous upgrade, HIP-3, which introduced permissionless perpetuals for developers, has accounted for over 35% of the platform's total trading volume since its introduction in October 2025.
Currently, outcome tokens are only available on the testnet, with no confirmed mainnet launch date.