Fed decisions (Jun-Sep)

Platform comparison

Market context

The Federal Reserve held rates steady at 3.50–3.75% in June, yet the policy outlook has flipped sharply from cuts to hikes. Nine of eighteen officials now project at least one rate increase before year-end, a stark reversal from March forecasts that anticipated easing [6]. This hawkish pivot, driven by inflation concerns and renewed Middle East tensions, has pushed the market’s implied probability of a September hike to roughly 70% [5]. Consequently, the 0% crowd-implied probability for a cut in the June–September window aligns with the Fed’s own dot plot, which deferred any reductions to 2027 [5][8].

Traders monitoring this Polymarket contract on Polygon should focus on the July 28–29 FOMC statement and the September 15–16 dot plot update, as these will confirm whether the hike trajectory holds. CME Fed funds futures currently show an 80% expectation for a September increase, moving away from the existing range [2]. Renewed Iran conflict has further escalated rate-hike odds, with the probability rising from 62% to nearly 69% in just two days [5]. Any deviation from this path—such as a surprise cut—would require a significant shift in inflation data or geopolitical calm.

The on-chain mechanics settle via USDC on Polygon using conditional tokens, resolving strictly on the upper bound of the target federal funds rate. A qualifying cut requires the new upper bound to be lower than the prior level; a hike requires it to be higher. Given the unanimous June decision to maintain the 3.5–3.75% range and the explicit shift in official projections, the market’s 0% YES probability reflects the consensus that no cut will occur across the three specified meetings [1][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Fed decisions (Jun-Sep) across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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 PolyGram. 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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.