Polymarket volume has pushed back above $410M for the trailing seven days as traders reposition ahead of the final 15 days before the US midterms, a highly consequential November Fed meeting, and a sharp move in crypto. Below are the contracts on Polymarket drawing the most attention and dollar flow this week, with the current market-implied probabilities and what they signal.
Election Markets Lead the Flow: Senate Control Back on a Knife’s Edge
The single highest-volume Polymarket contract this week is “Which party will control the Senate after 2026 midterms?”. Democrats are priced at 52%, Republicans at 47%, with the remaining 1% distributed across tie and runoff scenarios. The spread has narrowed roughly five points over the past 10 days, driven by late-cycle polling in Pennsylvania, Ohio, and Arizona.
The companion House control market tells a different story: Republicans sit at 58% to hold the chamber, down from 64% a month ago but still favored. Traders appear to be pricing in a split-government scenario, with the “Dems win Senate, GOP holds House” conditional market at 38% — the single most-liked election outcome on the book.
Watch the Pennsylvania Senate race contract: it has flipped three times in October and now trades at 54% for the Democratic candidate. Historically, Pennsylvania Senate races on Polymarket have been the most volatile in the final two weeks, and this one is not pricing enough implied volatility relative to past cycles.
Fed Rate Markets: A 25bp Cut Is Now the Consensus
Polymarket’s “Fed decision at November 2026 FOMC” market has consolidated this week after weeks of swings. Current pricing:
- 25bp cut: 71%
- No change: 22%
- 50bp cut: 6%
- Rate hike: 1%
The 25bp cut has been the dominant outcome for three straight weeks, but the “no change” tail has quietly rebuilt from a low of 14% after last Thursday’s hotter-than-expected PPI print. The spread between Polymarket and Kalshi on this contract is now less than two percentage points, which is historically tight — a sign the markets are efficient at this horizon.
The more interesting opportunity is in the December FOMC conditional market, where “two cuts by year-end” is priced at 44%. That looks mispriced given the trajectory of the labor market data, and it’s one of the few places where sharp traders are still finding edge this week.
Crypto: Bitcoin Year-End Targets Reset Lower
Bitcoin’s pullback from the $108K area has reshaped Polymarket’s year-end price contracts. The flagship “Will Bitcoin close 2026 above $100K?” market is now at 63%, down from 78% at the start of October. The “above $120K” variant has collapsed from 41% to 19%.
Ethereum year-end contracts have moved in parallel. “ETH above $5,000 by Dec 31” sits at 48%, essentially a coin flip, after trading above 60% for most of September. ETH/BTC ratio contracts are nearly inactive — a classic sign of exhaustion in the altcoin cycle narrative.
The under-the-radar contract this week: “Will any US spot Solana ETF launch in 2026?” is pricing 36%, with the January-launch variant at 61%. SEC approval timing continues to dominate the discussion, and this is one of the few crypto contracts where the information edge still favors specialist traders.
AI, Tech, and Macro: Where Volume Is Quietly Building
Three contracts have seen their 7-day volume more than double week-over-week:
- “Will OpenAI announce GPT-6 before January 1, 2027?” — currently 29%, up from 22% last Tuesday.
- “US GDP Q3 2026 above 2.5% annualized?” — 55%, slightly above consensus economist forecasts.
- “Will there be a ceasefire in Ukraine before 2027?” — 31%, a six-point rally on diplomatic signaling out of recent summits.
The GPT-6 contract in particular has drawn fresh capital after Anthropic’s model updates and Google’s reported DeepMind timelines, with traders arguing that Polymarket is still underpricing the probability of a competitive release before year-end.
Where to Trade
Polymarket remains the deepest venue for crypto-settled political, macro, and tech contracts, and most of the markets above have liquidity that comfortably supports five- and six-figure positions. For US-based traders, Kalshi is the regulated alternative and often prices overlapping contracts within one or two percentage points — a useful cross-check and occasional arbitrage source.
For a side-by-side on both venues, see our Polymarket overview and our full rankings of the best prediction markets in 2026.
Odds reflect Polymarket pricing as of October 21, 2026. Markets move continuously; verify current levels before trading.