> ## Documentation Index
> Fetch the complete documentation index at: https://goldrush.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# HIP-4 Outcome Markets Now Streaming

*Published May 4, 2026*

![HIP-4 Outcome Markets Now Streaming](https://www.datocms-assets.com/86369/1780000650-06_hip-4_outcome_markets_now_streaming.jpg)

HIP-4 launched on Hyperliquid mainnet on **2 May 2026**, adding **outcome markets** to HyperCore - fully-collateralized binary contracts that trade on the same CLOB as spot and perps, settle in USDH, and resolve to `0` or `1` against an authorized oracle.

Because HIP-4 markets ride the same matching engine as every other HyperCore market, the same GoldRush primitives that power perps and spot work on outcomes from day one - no new client, no new schema.

## What's new

* **Probability candles** - subscribe to `ohlcvCandlesForPair` or `ohlcvCandlesForToken` on any HIP-4 encoding. Prices are bounded `0.001`-`0.999`, so each candle's `close` is the implied probability.
* **Fills via `walletTxs`** - every HIP-4 fill arrives as a `HypercoreFillTransaction` with `price` as the implied probability and `closed_pnl` realised in USDH.
* **`outcomeMeta` discovery endpoint** - new drop-in Info type at `POST https://hypercore.goldrushdata.com/info` that returns the active outcome universe, including `outcome` ID, `name`, parsed `description`, and `sideSpecs`.
* **Settlement detection** - the last fill on a resolved market closes at `0` or `1`, followed by USDH ledger deltas on every position-holder.

The first live market is a recurring **daily BTC binary outcome** that resolves against the HyperCore BTC mark price at a fixed UTC timestamp. Permissionless builder deployment follows in stages, mirroring HIP-3's rollout - and new markets appear in `outcomeMeta` the moment they're registered.

[Learn more](https://goldrush.dev/docs/goldrush-hyperliquid/streaming/hip4-markets)