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

# Markets

> How prediction markets work in the Rekko API.

## Market identifiers

Every market is uniquely identified by a **platform** and **market\_id** pair.

| Platform   | ID format            | Example                   |
| ---------- | -------------------- | ------------------------- |
| Kalshi     | Ticker string        | `KXFED-26MAR19`           |
| Polymarket | Numeric condition ID | `0x1234...abcd`           |
| Robinhood  | Event slug           | `fed-rate-cut-march-2026` |

All endpoints that reference a specific market use the pattern:

```
/v1/markets/{platform}/{market_id}
```

## The Market object

```json theme={null}
{
  "platform": "kalshi",
  "market_id": "KXFED-26MAR19",
  "title": "Will the Fed cut rates at the March 2026 meeting?",
  "url": "https://kalshi.com/markets/kxfed-26mar19",
  "category": "economics",
  "yes_price": 0.62,
  "volume_24h": 48250.00,
  "liquidity": 125000.00,
  "open_interest": 340000.00,
  "resolution_date": "2026-03-19T18:00:00Z",
  "updated_at": "2026-03-24T14:30:00Z"
}
```

## Price interpretation

The `yes_price` field represents the market's implied probability that the event will occur:

* `0.62` means the market prices the event at **62% likely**
* Prices range from `0.0` (won't happen) to `1.0` (certain)
* The difference between Rekko's estimated probability and the market price is the **edge**

## Market lifecycle

Markets move through these stages:

| Status       | Meaning                                   |
| ------------ | ----------------------------------------- |
| `active`     | Trading is open                           |
| `closed`     | Trading has ended, awaiting determination |
| `determined` | Outcome is known, settlement pending      |
| `finalized`  | Fully settled and paid out                |

Use the [Resolution Intelligence](/api-reference/deep/resolution) endpoint for detailed resolution timing, time decay estimates, and key upcoming dates.

## Platforms

Rekko covers three prediction market platforms:

**Kalshi** — US-regulated exchange (CFTC-regulated). Markets use ticker-style IDs (e.g., `KXBTC-26MAR14-100000`). Higher regulatory certainty, tighter spreads on popular markets.

**Polymarket** — Crypto-native exchange on Polygon. Markets use condition IDs. Higher volume on political and crypto markets, wider variety of events.

**Robinhood** — Prediction markets integrated into the Robinhood brokerage app. Markets use event slugs. Growing retail audience with seamless access from the existing Robinhood user base.

## Listing markets

```bash theme={null}
# List all markets (both platforms)
curl https://api.rekko.ai/v1/markets \
  -H "Authorization: Bearer YOUR_API_KEY"

# Filter by platform
curl "https://api.rekko.ai/v1/markets?source=kalshi&limit=20" \
  -H "Authorization: Bearer YOUR_API_KEY"
```

<Card title="List Markets endpoint" icon="code" href="/api-reference/markets/list-markets">
  Full endpoint documentation with playground.
</Card>