Updated November 3, 2026. Polymarket’s order books are moving faster than they have in months. US midterm Election Day is live, the Fed’s December meeting is three weeks out, and Bitcoin is swinging through its tightest range of Q4. The result: a cluster of high-volume contracts where implied probabilities have moved three to eight points in the last 72 hours. Below is this week’s read on the markets that matter, with current prices and the catalyst behind each move.
Senate Control 2027 Is the Highest-Volume Contract on the Board
The headline market this week is Polymarket’s Senate Control 2027 contract. Republicans are trading at 58 cents to retain the chamber, Democrats at 42 cents to flip it. That spread has tightened from a 64-36 split a week ago as late-cycle polling in Pennsylvania, Ohio, and Nevada showed Democratic candidates closing within the margin of error. Volume on the contract crossed $38 million in the last seven days, making it the single most-traded prediction market contract globally this cycle.
The individual state races driving the move: Pennsylvania Senate at 51% Democrat, Ohio at 47% Democrat, and Nevada at 54% Democrat. All three were trading in the high 30s and low 40s for Democrats as recently as mid-October. Traders betting on a Democratic hold are concentrating in those three markets rather than taking the broad Senate contract, which is one reason the top-line odds have moved less dramatically than the state-by-state books.
Fed December Rate Cut Odds Slip to 71%
Polymarket’s “Will the Fed cut rates in December 2026?” contract is now trading at 71 cents on Yes, down from 83 cents at the start of October. The move reflects a hotter-than-expected October CPI print and firmer labor data in the last two Nonfarm Payrolls reports. Traders are repricing the probability that the FOMC pauses at the December 15-16 meeting rather than delivering the fourth cut of the year.
The companion contract, “Fed cuts rates at least once more in 2026,” sits at 76 cents, implying the market still expects at least one more cut this year even if December is skipped. For traders, the arbitrage is in the gap: a seven-cent spread between the two contracts is unusually wide for correlated events this close to the meeting. That gap has drawn fresh volume from macro desks, with $12 million in combined volume across the pair in the last five sessions.
Bitcoin Year-End Price Contracts Are Pricing a Flat Finish
Polymarket’s Bitcoin year-end 2026 price contracts have compressed sharply as the asset trades sideways between $108,000 and $115,000. “Bitcoin above $120,000 on December 31, 2026” is now 42% implied, down from 61% in late September. The companion “Bitcoin above $100,000 on December 31” sits at 88%, suggesting the market has effectively ruled out a drawdown but is no longer convinced the Q4 rally many expected will arrive.
Ethereum contracts have moved in the same direction. “Ethereum above $5,000 on December 31, 2026” is pricing at 34%, down from 52% six weeks ago. Traders cite thinner spot ETF inflows in October and a wave of liquidations around the recent $4,100 breakdown as the catalysts. The crypto book overall has absorbed roughly $21 million in volume over the past week, with most of the activity concentrated in the Bitcoin year-end strikes between $115K and $125K.
Sports: NFL Super Bowl LXI Odds Are Tightening Around Three Teams
Polymarket’s NFL Super Bowl LXI contract has consolidated around three favorites heading into Week 10. The Kansas City Chiefs are 22% implied, the Buffalo Bills 18%, and the Detroit Lions 15%. No other franchise is above 9%. That three-horse race is the tightest top-of-market the NFL contract has shown in three seasons, and it reflects the standings as much as it does the futures market: all three teams enter Week 10 with no more than two losses.
The sharpest recent move is on the Lions, who have climbed from 9% to 15% in the last three weeks on the back of a six-game win streak and the return of their starting quarterback from injury. Traders looking for value are focused on the second tier: the Baltimore Ravens at 9%, Philadelphia Eagles at 8%, and San Francisco 49ers at 7%. All three sit in the range where prediction market veterans historically find the best risk-adjusted entry points for Super Bowl futures.
Where to Trade
All of the contracts covered above are live on Polymarket’s order book, which continues to lead global prediction markets in volume and depth. US traders now have compliant access through Polymarket’s CFTC-registered venue launched earlier in 2026. Sign up for Polymarket for direct access to this week’s top contracts.
Kalshi lists competing contracts on most of the same events under direct CFTC regulation and tends to lead on US-specific economic and political markets. For the Fed December cut and Senate control contracts in particular, Kalshi’s books are often tighter than Polymarket’s. Sign up for Kalshi for the deepest US-regulated politics and economics markets.
For a full breakdown of this week’s top contracts across every major platform, see our updated prediction market rankings, refreshed with each new print.