Predictions.io has launched a suite of free tools designed to aggregate and compare data from various prediction markets, offering users a clearer view of market-implied probabilities and associated costs. This initiative addresses the growing discrepancies in pricing for identically worded questions across different venues, a trend amplified by record market volume and increasing regulatory attention.
Why This Matters
The materials describe a narrow update: Predictions. The exact reasons for the price discrepancies between venues for identically worded questions.
Broader Context
Source materials place the announcement in this context: Prediction markets have seen record volume and increased regulatory scrutiny.
Data Discrepancies Revealed
The new tools from Predictions.io, including a fee calculator and an odds converter, allow traders to analyze data from markets such as Kalshi, Polymarket, and Manifold. The platform currently tracks over 9,700 markets. This launch coincides with a period of intense scrutiny for the prediction market industry. In July 2026, Kalshi, Polymarket, and Polymarket US collectively posted $50.59 billion in volume, with Kalshi accounting for approximately 74.5% of that total. This surge in activity has drawn regulatory attention, including a probe by New York City into Kalshi and Polymarket, a Washington judge’s order for Kalshi to halt most wagers in the state, and the CFTC’s initiation of an internal review of “mention markets.”
Data aggregated by Predictions.io highlights significant price variability. On August 28th, 2026, the question “Blue tsunami in 2026?” was priced at 44.5% on Polymarket and 36.0% on Kalshi. Similarly, “Blue wave in 2026?” showed a difference of 8.5 percentage points, trading at 82.5% on one venue and 74.0% on another. Across a sample of directly comparable binary markets, the median gap was more than four points, with nearly half of the pairs differing by five points or more. Predictions.io emphasizes that it operates no market and takes no position in any contract.
Navigating Market Information
These price discrepancies underscore a key insight: “The spread between venues is the information.” When identically worded questions trade at significantly different prices, it complicates the notion of a single, definitive market-implied probability. The choice of which venue’s price to cite can appear arbitrary without full context. Predictions.io’s tools aim to provide this context by enabling users to directly observe these differences.
The increasing regulatory attention, including probes and judicial orders, signals a dynamic and potentially challenging environment for prediction markets. The CFTC’s review of “mention markets” further indicates broad governmental interest in the sector. While Predictions.io offers valuable data analysis tools, the ultimate outcomes of these regulatory actions remain uncertain.
Uncertainties persist regarding the precise reasons for the price differences between venues for identical questions, the eventual results of the New York City probe, and the conclusions of the CFTC’s review. Predictions.io’s platform offers a valuable resource for market participants seeking to navigate these complexities by providing transparent, comparative data in an evolving landscape.
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