Fed decisions (Jun-Sep)

Platform comparison

Market context

The Federal Open Market Committee faces three critical meetings between June and September 2026, with the market currently assigning zero probability to any interest rate cut. Instead, the prevailing consensus among policymakers and futures traders points toward a potential hike or a sustained pause, driven by inflation pressures exacerbated by renewed Middle East tensions following the Iran conflict.

Historical precedent suggests that a 0% probability for cuts is rare unless inflation is significantly above target, as seen in the aggressive tightening cycles of the early 1980s. In June 2026, the FOMC unanimously held rates at 3.5%–3.75% but eliminated forecasts for reductions this year, with the median projection shifting to 3.8% by year-end [2]. Nine members now predict a rate increase by late 2026, and CME Group’s FedWatch tool indicates a 70% likelihood of a hike by September [4]. This divergence from earlier cut expectations frames the current 0% crowd-implied probability as a reflection of hardened policy stance rather than market error.

Traders must monitor the July 28–29 meeting minutes and Fed Governor Christopher Waller’s comments, which signal a complete pivot from labour concerns to inflation containment [8]. The CME FedWatch tool currently prices a 25% probability of a 25-basis-point hike in July, with odds for a September increase rising to 68.8% [8]. On Polymarket, this event resolves as implied probability (0% YES for a cut), whereas Kalshi uses decimal odds and requires KYC, while Betfair and Smarkets offer decimal pricing with varying fee structures and regulatory reach. The upcoming dot plot release at the September meeting will be the definitive catalyst for confirming the hike trajectory [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Fed decisions (Jun-Sep) from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.