In December 2025, Kalshi is experiencing a period of explosive growth, largely driven by the full legalization of political and sports betting in the US. Weekly trading volumes on the platform have surpassed $1.2 billion this month.

Here are the top 5 most popular and discussed markets (bets) on Kalshi over the past month:

This remains the most liquid sector on Kalshi.

• The Bet: Will the Fed cut interest rates by 25 basis points in December 2025 or leave them unchanged?

• Why it’s popular: Investors use these contracts as a primary tool for hedging macroeconomic risks. This month, "combo-markets" (predicting both the rate and the number of dissenting committee members) have seen record volume.

Since receiving expanded regulatory approval, sports have begun to dominate trading volume.

• The Bet: Specific match outcomes and long-term awards, such as "Who will win NFL Offensive Player of the Year?"

• Why it’s popular: Kalshi has become a legal, exchange-traded alternative to traditional sportsbooks in many US states, offering better odds and transparency.

• The Bet: Which AI model will hold the #1 spot on the LMSYS Chatbot Arena leaderboard as of December 31, 2025?

• The Favorites: High trading activity surrounds Gemini 3 Pro (Google), Claude 4.5 (Anthropic), and Grok 4.1 (xAI).

• Why it’s popular: The hype surrounding neural network development has transitioned into a massive financial prediction market.

• The Bet: Will the US Consumer Price Index (CPI) for November be higher than 0.2% month-over-month?

• Why it’s popular: Kalshi is now recognized as a "leading indicator" for macroeconomists. Traders watch these contract prices to understand real market expectations before the official government data is released.

• The Bet: Who will make the shortlist and who will be the final winner?

• Why it’s popular: December is the peak month for cultural and social predictions. This year’s betting pool is particularly large due to high-profile candidates from the tech and political spheres.

In December 2025, Kalshi is experiencing a period of explosive growth, largely driven by the full legalization of political and sports betting in the US. Weekly trading volumes on the platform have surpassed $1.2 billion this month.

Here are the top 5 most popular and discussed markets (bets) on Kalshi over the past month:

This remains the most liquid sector on Kalshi.

• The Bet: Will the Fed cut interest rates by 25 basis points in December 2025 or leave them unchanged?

• Why it’s popular: Investors use these contracts as a primary tool for hedging macroeconomic risks. This month, "combo-markets" (predicting both the rate and the number of dissenting committee members) have seen record volume.

Since receiving expanded regulatory approval, sports have begun to dominate trading volume.

• The Bet: Specific match outcomes and long-term awards, such as "Who will win NFL Offensive Player of the Year?"

• Why it’s popular: Kalshi has become a legal, exchange-traded alternative to traditional sportsbooks in many US states, offering better odds and transparency.

• The Bet: Which AI model will hold the #1 spot on the LMSYS Chatbot Arena leaderboard as of December 31, 2025?

• The Favorites: High trading activity surrounds Gemini 3 Pro (Google), Claude 4.5 (Anthropic), and Grok 4.1 (xAI).

• Why it’s popular: The hype surrounding neural network development has transitioned into a massive financial prediction market.

• The Bet: Will the US Consumer Price Index (CPI) for November be higher than 0.2% month-over-month?

• Why it’s popular: Kalshi is now recognized as a "leading indicator" for macroeconomists. Traders watch these contract prices to understand real market expectations before the official government data is released.

• The Bet: Who will make the shortlist and who will be the final winner?

• Why it’s popular: December is the peak month for cultural and social predictions. This year’s betting pool is particularly large due to high-profile candidates from the tech and political spheres.