Infiniti Intelligence Hourly Briefing — Oct 12, 2026 · 9:54 PM ET

Kalshi recorded its largest trading week on record at approximately $19B, according to DeFi Rate’s Oct. 12 snapshot. The report also pointed to growth at Polymarket US, where volume roughly tripled relative to its fall level.

Combination contracts drive Kalshi’s record

DeFi Rate attributed Kalshi’s weekly high to parlay-style combination contracts. That makes the product category central to the reported surge, rather than simply a backdrop to the platform’s overall activity.

Polymarket US also sharply increased its share, according to DeFi Rate. The available summary does not specify that share or identify the precise fall period used for the volume comparison.

The report was published Oct 12, 2026, at 9:54 PM ET. Its full source text was unavailable, leaving the headline and summary as the basis for these figures and limiting any further comparison between the platforms.

What it means for prediction markets

• Product mix matters: Kalshi’s approximately $19B record was driven by combination contracts; the available material does not establish how activity changed in other contract categories.
• Polymarket US is expanding its footprint: Roughly tripling its fall volume accompanied a sharp share increase, but the summary provides no exact share figure.
• The comparison remains incomplete: Without the underlying breakdown, the snapshot does not establish whether either platform’s growth will persist.

Los Angeles moves into first

The Rams have overtaken the 49ers as the favorites to win Super Bowl LXI, according to DeFi Rate’s latest prediction-market board. Los Angeles stands at 12%.

The update, published Oct 12, 2026 · 9:54 PM ET, marks a change from the start of the day, when San Francisco led the board at 14%.

Prices differ across platforms

DeFi Rate lists the Rams at 11.5¢ on Kalshi and 13¢ on Polymarket. Both platform prices accompany the board’s 12% figure for Los Angeles.

The available summary does not give San Francisco’s latest price or explain what prompted the change in leadership. It establishes a new favorite, but not the size of the Rams’ current lead over the 49ers.

What it means for prediction markets

• The ranking has changed: Los Angeles now leads DeFi Rate’s board, replacing the team that opened the day on top.
• Venue matters: The Rams’ listed prices differ between Kalshi and Polymarket; the board’s 12% figure should not be read as an identical quote on both.
• The comparison has limits: San Francisco’s 14% was its opening figure, not a contemporaneous price alongside the Rams’ latest reading.