Prediction Tape records live prices from Polymarket and Kalshi every few minutes. This section turns that record into dated, citable data: where the two biggest prediction markets disagree, and who is moving up Polymarket’s leaderboard. Each page says when its data was taken, how it was built and how to cite it.
Data pages
Where Polymarket and Kalshi disagree: weekly price gaps
The week's largest gaps between the two venues, from hourly snapshots.
Open →Polymarket leaderboard movers
New entrants and climbers in the all-time top 50.
Open →Using our data
- Cite the page and the date. Every data page shows a “data as of” time; prices change by the minute, so a figure without a time is misleading.
- Sources. Prices come from Polymarket’s and Kalshi’s public APIs. Leaderboard data comes from Polymarket’s public leaderboard. See About & methodology.
- Not advice. These are records of market prices, not forecasts or recommendations.
Related: Company pages · Live price-gap scanner · Polymarket leaderboard · All live markets