Cross-Venue Arbitrage: Polymarket vs. Kalshi

What is cross-venue arbitrage?

When the same event is traded on multiple venues, prices can diverge due to liquidity differences, user bases, or timing. A trader who buys the underpriced side and sells the overpriced side captures a risk-free return (minus fees).

Polymarket vs. Kalshi

Both venues trade major political and economic events, but their user bases and liquidity profiles differ. A market might be 62% on Polymarket and 58% on Kalshi for the same outcome. The 4% gap is arbitrage — if fees allow.

Fee-aware calculation

Our Cross-Venue Arbitrage scanner factors in: - Polymarket maker/taker fees and rebates - Kalshi transaction fees - Settlement costs - Capital lock-up time

Only edges with positive net EV after all fees are surfaced.

Execution

The Desk and Research tiers support auto-execution with configurable size limits. Pro and Analyst tiers receive alerts with the full calculation breakdown.

Getting started

Enable Cross-Venue Arbitrage in your Pro+ plan, set your minimum edge threshold, and wait for alerts.