Most blockchains have one product. Hyperliquid keeps adding products to the same execution engine and watching liquidity compound. Spot in HIP-1. Liquidity bootstrapping in HIP-2. Permissionless perp deployment in HIP-3. With HIP-4, Hyperliquid is now trading the probability that real-world events occur, on the same order book, in the same trading account, settled in the same currency.
HIP-4 introduced outcome contracts to HyperCore, putting Hyperliquid into direct competition with Polymarket and Kalshi without bolting on a separate platform. The pitch is simple: if you can trade BTC perps, ETH spot, and an event contract on whether the Fed cuts rates, all from one margin account, your hedging surface area just got bigger. Individual outcome markets settle in USDH, and the best way to get USDH on Hyperliquid is with Across with no fees.
Here's what HIP-4 actually is, how it works, and why it matters for the chain that's quietly trying to swallow every market type.
What HIP-4 Actually Introduces
HIP-4 adds outcome markets to Hyperliquid as a native primitive. Outcome contracts are fully collateralized binary instruments that settle within a fixed range, useful for prediction markets and bounded options-like instruments (source: https://hyperliquid.gitbook.io/hyperliquid-docs/hyperliquid-improvement-proposals-hips/hip-4-outcome-markets).
The mechanic is straightforward. Each contract trades between 0 and 1, and the price represents the market's implied probability of an event occurring. If the event happens, the contract settles at 1. If it doesn't, it settles at 0. A trader buying a YES contract at 0.60 implicitly believes there's better than a 60% chance the event resolves true (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
There's no leverage. There's no liquidation risk. The most you can lose is your initial stake, because positions are fully collateralized at deployment. That's a meaningful structural difference from perpetuals, where margin can be called and positions liquidated.
The first market on Hyperliquid is a recurring binary outcome that settles daily at 06:00 UTC against the BTC mark price on HyperCore (source: https://hyperliquid.gitbook.io/hyperliquid-docs/hyperliquid-improvement-proposals-hips/hip-4-outcome-markets). Multi-outcome markets are planned but weren't part of the initial mainnet release.
Why This Is the Logical Next HIP
Hyperliquid's roadmap has been consistent: expand the surface area for trading inside a single execution engine. Every HIP is another category of asset slotted into the same infrastructure (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
HIP-1 gave HyperCore native tokens
HIP-2 bootstrapped liquidity for those tokens
HIP-3 opened permissionless perpetual futures deployment
HIP-4 adds outcome contracts
What ties them together is composability. A trader holding a long ETH perp on Hyperliquid can now buy a YES contract on "Fed cuts rates by July" using the same margin account. They don't need to wire collateral to a separate prediction market platform, manage two positions across two custody systems, or pay friction at every step. The perp and the outcome contract sit in the same account, and they can offset each other in the same risk model (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
That composability is why Hyperliquid keeps adding HIPs instead of spinning up sister chains. Every new market type deepens the same liquidity pool rather than fragmenting it.
How an Outcome Market Gets Built
Markets on Hyperliquid follow a four-step lifecycle: creation, opening auction, continuous trading, settlement (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
Creation. A builder stakes 1 million HYPE to deploy an outcome market. The stake is slashable if the builder manipulates the oracle or triggers invalid state transitions, with slashed HYPE burned. During deployment, the builder defines the event schema: title, resolution time, resolution source, authorized oracle updater. They can optionally add a challenge window for disputed resolutions and set an additional fee share of up to 50% on top of Hyperliquid's base fees.
Slot recycling. Markets deploy into slots within a builder's event DEX. Once a market resolves, the slot can be recycled with a new event. That single 1M HYPE commitment can support a rolling series of markets, which is the unit-economics insight that makes the stake feasible (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
Opening auction. When a market is deployed, a roughly 15-minute single-price clearing auction runs. Users submit orders ("buy YES up to price P"), but nothing executes during the auction. When it closes, the engine picks the price that maximizes matched volume, and every matched order fills at that single price. Unfilled orders carry into continuous trading at their original limits (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
Continuous trading. After the auction, the market transitions to continuous order-book trading on HyperCore. Orders follow price-time priority. Limit and market orders work the same as any other Hyperliquid market. Prices stay bounded between 0.001 and 0.999 until the event resolves.
Settlement in USDH. When the event resolves, the authorized oracle posts the final outcome: 1 if it occurs, 0 if it doesn't. Trading halts, open orders cancel, and all positions settle automatically to their final PnL in USDH (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/). That last detail is worth pausing on: outcome markets settle in Hyperliquid's native stablecoin, which gives USDH another structural use case beyond perp quoting.
How HIP-4 Compares to Polymarket and Kalshi
Polymarket and Kalshi are the incumbents in the prediction market category. HIP-4's pitch isn't that it's bigger, at least not yet. The pitch is that prediction markets become composable with everything else a trader is already doing on Hyperliquid.
The early numbers reflect a serious launch with plenty of room to grow. On its first mainnet day, HIP-4 logged 6.05 million contracts traded, taking roughly 0.7% of the prediction market's daily share. Kalshi and Polymarket reported significantly higher volumes, with 546 million and 190 million contracts respectively (source: https://phemex.com/news/article/hyperliquid-hip4-event-contract-launches-with-605-million-contracts-traded-78460).
These numbers are impressive, but the structural argument doesn't depend on day-one volume. It depends on what Hyperliquid can offer:
A single trading account that holds spot, perps, and outcome contracts simultaneously
Margin and PnL netting across all three market types
Liquidity provided by the same market makers already active on HyperCore
Settlement in USDH, the stablecoin Hyperliquid traders are already holding
Polymarket and Kalshi are excellent prediction markets. They aren't trading platforms with derivatives next door. The structural argument is that traders who care about hedging across asset classes will end up where the margin model is unified.
What HIP-4 Means for Builders
HIP-4 turns event markets into deployable infrastructure rather than standalone applications (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/). A builder who stakes the 1M HYPE doesn't just launch one market. They get a slot they can recycle across recurring events. That changes the design space:
Macroeconomic releases (CPI prints, FOMC decisions, jobs reports)
Earnings markets for tokenized equities
Election and governance markets
Major product launches and protocol milestones
Sports and entertainment outcomes
The infrastructure-grade requirement also changes what kinds of products can be built around outcome markets. Cross-market arbitrage bots, event-trading interfaces, layered structured products, probability-data products, and prediction market frontends all become straightforward to build on top of a CLOB-based outcome primitive (source: https://blog.quicknode.com/hip4-hyperliquid-outcome-contracts/).
For everyone else, HIP-4 expands the trading menu. Ten years ago a fund hedging macro exposure with a perpetual position would have to source event probability somewhere offchain. Now they can quote both legs in the same place.
How to Get Onto Hyperliquid for HIP-4 Markets
Outcome contracts settle in USDH. To trade them, you need USDH in your Hyperliquid trading account. The fastest way to get there is bridging through Across.
The flow takes about 30 seconds:
Go to across.to
Pick your origin chain and select USDC as the origin token
Pick HyperCore as the destination, USDH as the destination token
Enter the amount and confirm
Across supports up to $1M per transaction with zero bridge fees on the USDC-to-USDH route. Fills land in roughly 2 seconds from L2s and 10 seconds from Ethereum L1 (source: https://across.to/blog/free-bridge-usdc-to-usdh-hyperliquid). The only thing you pay is origin chain gas.
Once USDH is in your Hyperliquid account, every market on the chain (perps, spot, and now outcomes) uses the same balance.
Bridge USDC to USDH on Hyperliquid for FREE.
