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Market InsightsMonday, September 7, 20263 min readPolymarketFlow Research

Market Intelligence — Monday, September 7, 2026

Today's market overview

Active prediction markets traded $102.0M in the last 24 hours. Here is what moved, where the largest positions sit, and what resolves next.

What moved

Biggest drop

US Open WTA: Iga Swiatek vs Qinwen Zheng fell -31.0 points to 50% on $807.6K of 24-hour volume.

4 markets with outcomes still in doubt moved at least 5 points today; markets that simply settled are excluded. The full list is on the movers page, and the screener filters by volume and anomaly score.

Where the biggest money sits

Positions below are valued at the current price. Amounts are share counts; each winning share redeems for $1, so "at risk" is shares times price. Parked capital priced at 95¢ or higher and identical-size positions spread across every outcome of one event are excluded, because those are market-making rather than directional bets.

  • 0xa5ef39… holds 8.7M shares of NO on "Will there be no change in Fed interest rates after the September 2026 meeting?" at 52¢ — about $4.5M at risk, paying $8.7M if it resolves that way.
  • TwoEyes holds 361.4K shares of YES on "Will there be no change in Fed interest rates after the September 2026 meeting?" at 49¢ — about $175.3K at risk, paying $361.4K if it resolves that way.
  • totoro3miyazaki holds 238.9K shares of YES on "US Open WTA: Mirra Andreeva vs Anastasia Potapova" at 73¢ — about $173.2K at risk, paying $238.9K if it resolves that way.
  • suntori holds 274.4K shares of YES on "Will there be no change in Fed interest rates after the September 2026 meeting?" at 49¢ — about $133.1K at risk, paying $274.4K if it resolves that way.
  • Full rankings on the biggest bets page, with wallet history in the whale tracker and new positions in the free alerts feed.

    Resolving in the next seven days

  • Sep 13 — Will Carlos Alcaraz win the 2026 Men's US Open? (currently 56%, $2.1M traded)
  • Sep 13 — Will Alexander Zverev win the 2026 Men's US Open? (currently 23%, $968.8K traded)
  • Sep 13 — US Open WTA: Mirra Andreeva vs Anastasia Potapova (currently 73%, $957.2K traded)
  • Sep 13 — US Open WTA: Iga Swiatek vs Qinwen Zheng (currently 50%, $813.4K traded)
  • Sep 13 — Will Ben Shelton win the 2026 Men's US Open? (currently 9%, $773.1K traded)
  • The full 31-day view is on the resolution calendar.

    Where to look next

    Live trackers for the questions that draw the most attention: Fed decision odds for cut, hold or hike at each remaining FOMC meeting, and 2026 midterm odds for control of Congress. Perpetual futures data, including funding rates, is on the Perps screener.

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    *Generated from PolymarketFlow's ingested Polymarket data. Prices are market prices shown for information only, not advice. Trading availability depends on your jurisdiction.*