Weekly Market Recap: What Moved This Week (December 2025)
It's been an eventful week on Polymarket with major developments on the regulatory front, new market launches, and some surprising swings in political betting. Here's what you need to know.
Big News: Polymarket US Launch
The biggest story this week is Polymarket's official re-entry into the US market. After acquiring QCEX (a CFTC-licensed clearinghouse) for $112 million in July, Polymarket has begun rolling out its regulated US exchange.
Key Details:
- iOS App Launch – Over 200,000 waitlist signups in the first week
- Sports Markets First – Starting with sports, other categories coming later
- 0.01% Fees – 100x cheaper than competitor Kalshi
- Full Compliance – Operating under CFTC regulation
This marks the end of a long regulatory journey. The DOJ and CFTC officially ended their investigations without bringing charges in July 2025.
Market Movements
🏈 Sports Markets
With the NFL season in full swing:
- Super Bowl 2026 Winner remains one of the most liquid markets
- Chiefs continue as favorites despite mid-season struggles
- Daily volume on NFL games exceeds $10M on big matchups
🏛️ Political Markets
The 2028 cycle is already heating up:
Democratic Nominee 2028 ($376M volume)- Gavin Newsom: 37% (steady)
- Gretchen Whitmer: 18% (up 3%)
- Josh Shapiro: 12% (down 2%)
- AOC: 8% (volatile)
- Republican Senate + Democratic House: 45%
- Republican Trifecta: 32%
- Democratic gains: 23%
🌍 Geopolitics
Russia-Ukraine Ceasefire 2025 – Sitting at just 4% with only two weeks left in the year. Market is pricing in continuation of conflict into 2026. China-Taiwan Tensions – Various markets tracking semiconductor supply chain disruption remain elevated vs. 2024 levels.Platform Stats This Week
- Total Trading Volume: $340M+ (7-day rolling)
- Active Traders: 85,000+
- New Markets Created: 47
- Largest Single Trade: $2.3M on Super Bowl market
Trader Spotlight
This week we tracked an interesting pattern: three whale accounts (now confirmed by PolyTrack's cluster detection to be the same trader) accumulated large positions in underdog 2028 candidates.
The trader has a 73% win rate over 6 months and $2.1M in lifetime profits. Worth watching where they go next.
Lessons From This Week
1. Early Mover Advantage
Traders who positioned for the US launch announcement before it went mainstream saw 15-20% gains on related markets.
2. Liquidity Matters
Some newer markets saw 10%+ price swings on relatively small orders. Size your positions appropriately in thin markets.
3. Cross-Platform Arbitrage
The Polymarket/Kalshi price gap on several markets widened to 5%+ this week – opportunities for those watching both platforms.
What to Watch Next Week
- Polymarket US iOS app wider rollout – Will sports markets see a volume surge?
- Year-end political positioning – 2025 resolution markets settling
- Holiday trading patterns – Typically lower volume, potentially wider spreads
Quick Takes
✅ Bullish on: Polymarket US adoption driving mainstream volume⚠️ Cautious on: Low-liquidity political markets with thin depth
📊 Watching: How the 0.01% fee structure competes with Kalshi
This recap covers December 15-21, 2025. Markets move fast – always do your own research before trading.
Resources
See you next week, and trade responsibly!
