Infiniti Briefing

Politics leads reported trading

The Infiniti Briefing snapshot published Oct 13, 2026 at 9:24 PM ET put trading across Kalshi and Polymarket at $5.97B, covering 2,138 open markets. Politics accounted for $4.52B, followed by sports at $771.3M and crypto at $231.1M.

The supplied page from predictionbubbles.net lists a different count: 2146 open markets across 9 categories. The material does not reconcile that figure with the briefing snapshot, so the two counts should be treated as separate readings rather than a confirmed increase.

According to predictionbubbles.net, its combined feed updates every 15 minutes. The embedded visualization covers the 300 largest markets by traded volume, while the full board includes all 2146. Bubble size represents volume and color represents market-implied probability; individual market pages provide price histories.

Rates and AI show distinct pricing

Interest-rate contracts illustrate the importance of reading the underlying question. According to predictionbubbles.net, Polymarket priced no change after the October 2026 Fed meeting at 80.5%, compared with 18.5% for a 25 bps increase. Kalshi’s contract specifying a 0bps hike at that meeting stood at 82.0%. A separate Polymarket contract on no Fed rate cuts in 2026 was at 96.2%.

The board also showed Kalshi’s best-AI contracts for Dec 31, 2026 pricing Claude at 43.3%, Gemini at 40.1% and ChatGPT at 10.2%. In crypto, Polymarket assigned 0.4% to Bitcoin reaching $250,000 by December 31, 2026, while Kalshi priced Bitcoin being above $200000 by Jan 1, 2027 at 11:59PM ET at 3.0%, according to predictionbubbles.net.

Activity rankings measure something different from those outcome prices. Predictionbubbles.net says its 0–100 opportunity score primarily compares recent trading pace with a market’s own norm, then incorporates probability movement and a small bonus for approaching deadlines. It does not assess whether an outcome will occur or whether a contract is correctly priced.

What it means for prediction markets

• Volume is not current exposure. The $5.97B headline describes traded activity, not liquidity available now or the value of positions still open.
• Cross-venue comparisons require contract-level checks. Related questions can have different wording and resolution conditions; a price gap alone does not establish equivalence.
• Movement and probability are separate signals. The board reports 24-hour changes in probability points, while its activity score highlights unusual trading rather than outcome likelihood.
• Coverage counts need context. The briefing’s 2,138 markets and the source page’s 2146 should not be combined into a growth claim without reconciled observations.