Fed Decision in September?

Platform comparison

Market context

The real-world event driving this market is the Federal Open Market Committee’s September 2026 meeting, where policymakers will decide whether to alter the upper bound of the target federal funds rate. The current crowd-implied probability of just 4% for a positive change suggests traders expect rates to remain steady, despite earlier expectations of cuts that shifted after energy prices rose.

Historically, September rate moves have been rare but consequential; the last major September action occurred in 2024 when the Fed cut rates by 50 basis points, a stark contrast to today’s hold narrative. Since the June 2026 meeting kept rates unchanged at 3.50%–3.75% amid elevated inflation and solid activity, the 4% probability aligns with a pattern of caution seen in recent cycles where the Fed prioritises price stability over rapid adjustment[1][3].

Programmatically, a power-user would monitor the FOMC calendar for the September statement, the accompanying press conference, and any shifts in the Summary of Economic Projections. Key catalysts include upcoming inflation data (CPI, PCE), employment reports, and comments from new Chair Kevin Warsh, who has committed to price stability[3]. Recent analysis from Forbes notes that markets now price in a reasonable chance of a rate hike later in 2026, making the September decision a critical inflection point for conditional order strategies[1]. Traders should also watch for any surprise shifts in the Fed’s inflation outlook, as these often trigger immediate market re-pricing[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Fed Decision in September? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.