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Kalshi vs Polymarket: Which Prediction Market Should You Trade?

In-depth comparison of Kalshi and Polymarket for prediction market traders. Regulatory structure, liquidity, fees, API tooling, and cross-venue trading with SimpleFunctions.

Liquidity Migration Across Resolution: Where the Money Goes When a Market Closes

When a flagship prediction market closes, the capital that was in it migrates to next-period siblings, adjacent categories, or off the venue entirely. Three migration patterns and the receiving-market opportunity.

Kalshi vs Polymarket: Mechanics, Fees, Regulation, Liquidity (2026)

Side-by-side comparison of Kalshi and Polymarket in 2026. Fee math, calibration data, withdrawal speed, and a decision tree for picking the right venue.

Cross-Venue Convergence Dynamics: Why Kalshi and Polymarket Converge — and When They Don't

Why the same outcome on Kalshi and Polymarket usually trades within 2-5 cents — and the three specific things that cause the gap to widen. Diagnostic guide and worked convergence trade.

Resolution Ambiguity Score: Quantifying Rule-Risk Per Market

A heuristic 0-10 score for the rule risk on a prediction market, based on edge case count, venue dispute history, and source-of-truth specificity. The pre-trade discipline that catches Polymarket UMA disputes and Kalshi rule-mismatches before they catch you.

Your First Prediction Market Trade: End-to-End CLI Walkthrough

Step-by-step CLI tutorial for your first prediction market trade. Install, scan, create a thesis, find edges, check liquidity, place an order, and monitor — all from the command line.