Focal: Signal Credibility Index for Prediction Markets
Maksym Nechepurenko · 2026 · Working Paper
We adapt classical market-microstructure theory — PIN, VPIN, Kyle's λ, order imbalance, and variance-ratio diagnostics — to the discrete-outcome, on-chain CLOB structure of decentralized prediction markets.
Market microstructure is the study of how prices are formed through the trading process — the mechanics beneath the efficient-market surface. On prediction markets, this process is uniquely transparent: every trade, every wallet, every order is on-chain and auditable.
This transparency creates both opportunity and responsibility. We can measure informed trading with a precision impossible in traditional markets. But the same techniques that detect informed flow can, if published carelessly, help bad actors evade detection. We publish methods at a level of abstraction that advances the field without providing a free evasion guide.
Maksym Nechepurenko · 2026 · Working Paper
Maksym Nechepurenko · 2026 · Working Paper
A curated validation set mapping eight publicly documented episodes of suspected informed trading on Polymarket to concrete on-chain market identifiers. Cases span 2023–2026 and cover 24 individual markets across military and geopolitical actions, corporate proprietary disclosures, and regulatory decisions.