Infiniti Intelligence Hourly Briefing — Oct 12, 2026 · 9:24 PM ET

Kalshi sets a weekly record

Kalshi recorded its largest trading week at $19B, according to DeFi Rate’s Oct 12 report, marking a new volume high for the prediction-market exchange.

DeFi Rate’s tally also put trading across 9 prediction-market exchanges at $3.6B over the last 24 hours. That aggregate counts contracts at $1, a measurement convention that matters when comparing it with other volume figures.

The report’s headline also indicated that Polymarket US tripled its fall trading volume. The available material does not specify the comparison period or provide an absolute volume figure for Polymarket US.

The figures describe different windows and scopes: Kalshi’s record covers a week, while the $3.6B total spans 24 hours across multiple exchanges. With the full source text unavailable, the supplied summary does not establish individual exchanges’ shares of that daily total.

What it means for prediction markets

• Volume comparisons need consistent definitions. The $3.6B daily aggregate uses contracts counted at $1; it should not automatically be equated with figures calculated on another basis.
• The growth signals have limits. Kalshi’s weekly record and Polymarket US’s reported tripling indicate increased activity, but the available material does not identify which contracts drove it or establish whether it will persist.

The 2026 Nobel Prize in Economic Sciences went to Robert E. Hall and Michael Woodford on Oct 12, rather than the candidate who led Polymarket’s Oct 8 board, according to PredictionNews.

Ariel Pakes had been the market’s favorite at 18.5%. The result therefore diverged from that earlier ranking, though the leading price itself indicated substantial uncertainty.

A favorite, not a consensus

Pakes’s position illustrates the distinction between leading a prediction market and being priced as likely to win. At 18.5%, the favorite was still well below an even chance.

The available summary does not provide Hall’s or Woodford’s Oct 8 prices, or show how the market moved before the announcement. It supports a comparison between the earlier favorite and the eventual winners, but not an assessment of the market’s final forecast.

What it means for prediction markets

• Rank is not confidence: A candidate can lead the board at 18.5% without commanding anything close to a majority probability.
• Timing matters: The cited snapshot is from Oct 8, while the award was announced on Oct 12; it should not be treated as the closing market view.
• One outcome has limits: The favorite’s loss alone does not establish whether the quoted probabilities were well calibrated.