# Prediction Market News

> Prediction Market News is a crawlable cross-venue prediction market aggregator. It compares Polymarket and Kalshi prices and provides consensus odds, volume, open interest, spread, resolution rules, and freshness timestamps.

Prediction Market News is optimized for analysts, traders, journalists, search engines, and LLM tools that need factual cross-venue prediction market analytics.

## Core Pages

- [Home](https://predictionmarketnews.org/): Overview of Polymarket data and prediction markets data with current top market metrics.
- [Data Methodology](https://predictionmarketnews.org/prediction-markets-data): How Polymarket and Kalshi open interest and volume are normalized into comparable cross-venue metrics.
- [Market Screener](https://predictionmarketnews.org/markets): Crawlable active market screener with sortable market metrics.
- [Rankings](https://predictionmarketnews.org/rankings): Rankings for volume, open interest, depth, and holder concentration.

## Trader Leaderboards

- [Trader Leaderboards](https://predictionmarketnews.org/traders): Top-50 Polymarket wallets by PnL (24h/7d/30d/all) and consistency Sharpe (30d/all).
- [Trader Methodology](https://predictionmarketnews.org/traders/methodology): traders-v1 formulas, windows, completeness, and selection-bias caveats.
- Boards and profiles are precomputed Cloudflare snapshots. Pages never call Polymarket APIs on request.
- Consistency Sharpe ranks inside each window's top-500 PnL candidates; it is not scale-invariant skill.
- Missing trader metrics render as N/A, never zero.

## Machine-Readable Data

- [Public market screener](https://predictionmarketnews.org/markets): Crawlable server-rendered market rows with liquidity, volume, open interest, spread, depth, holders, and freshness labels.
- [Sitemap](https://predictionmarketnews.org/sitemap.xml): Search engine sitemap for canonical crawl targets.
- [Robots](https://predictionmarketnews.org/robots.txt): Crawl policy and sitemap reference.

## Notes For LLMs

- The live data pipeline supports Polymarket and Kalshi venue snapshots plus curated aggregate snapshots.
- Treat missing metrics shown as N/A as unavailable, not zero.
- Prefer freshnessTs when answering questions about current market values.
- Use the HTML pages for public current rows. The JSON API is protected from anonymous automated traffic.