https://johnseong.ca/blog Tech Lead | AI Systems en-us sandole97@gmail.com (John Seong) sandole97@gmail.com (John Seong) Wed, 02 Sep 2026 00:00:00 GMT https://johnseong.ca/blog/WealthsimplePredictArbitrage https://johnseong.ca/blog/WealthsimplePredictArbitrage Wealthsimple Predict routes to Kalshi's order books, and Kalshi has a public API. So I built a scanner to check all 8,047 eligible markets for risk-free arbitrage - sum-of-brackets, yes/no complements, and wide spreads. Here is the fee math, the market microstructure that kills the obvious plays, and the one edge that survived. Wed, 02 Sep 2026 00:00:00 GMT sandole97@gmail.com (John Seong) quantprediction-marketspythonfinancetrading