Prediction markets are becoming financial data, but a 63% price does not always mean 63% odds

PredictionBubbles is a dashboard that maps prediction markets, such as Polymarket and Kalshi, onto one screen.The platform turns its tradable questions into bubbles that show probability, price movement, and volume, offering a discovery view of two venues that have traditionally required users to browse individual markets.The live site lets users size bubbles by open interest, 24-hour volume, or an activity ratio, then filter by category, platform, expiry, probability, and open interest. The format resembles the screeners and heat maps used to scan stocks or crypto assets.In April, ProCap Financial said Kalshi Research would feed real-time prediction market figures into ProCap Insights. The companies described it narrowly as Kalshi's first supply agreement with a financial research provider serving paying subscribers.Meanwhile, Polymarket documents public market-discovery and analytics APIs, along with public order-book and pricing data. Its developer materials also describe near-real-time market WebSocket feeds and a builder program for third-party applications.Kalshi said in May that institutional trading volume had increased 800% in six months, a company-reported figure. It rele...