Hyperliquid Enters the Prediction Market Race With a New Outcome Token Fee Model on Testnet

[johnblockbuster]

Hyperliquid has published a fee framework for outcome token trading on its testnet, marking a formal step into the prediction market space and setting up a direct challenge to Kalshi and Polymarket. The disclosure follows HyperCore's backing of HIP-4 and introduces a six-scenario fee structure designed to lower entry costs for traders while capturing revenue at the exit. The key design choice is that minting outcome tokens incurs no fees and does not contribute to trading volume, while fees only apply when traders close or settle positions. Normal trades may charge only the maker or no one at all, burning trades may incur fees on both sides or only the taker, and settlement distributes payouts proportionally based on the settlement fraction.

The timing of the launch is significant. Monthly notional trading volume in prediction markets surged more than 520% to an all-time high of $27 billion in April, with Kalshi and Polymarket accounting for the bulk of that activity. Hyperliquid is entering a sector at the peak of its growth momentum, bringing the same liquidity infrastructure and user base that has made it one of the most successful decentralized perpetuals platforms into a new and rapidly expanding product category. The testnet phase allows Hyperliquid to refine the fee model and execution mechanics before a mainnet launch, but the public documentation signals that the product is being built with competitive intent rather than as an experimental feature.

[chainsniff]

$27 billion monthly prediction market volume. 520% growth. Hyperliquid: this seems like a good time to enter. they are correct.