Fed decisions (Jun-Sep)

Platform comparison

Market context

The Federal Open Market Committee is set to decide on the upper bound of the target federal funds rate at three upcoming meetings in June, July, and September 2026, with the market currently pricing zero probability for a rate cut. The June 16–17 meeting already concluded with rates held steady at 3.50%–3.75%, and officials shifted their dot plot to anticipate hikes rather than cuts by year-end [1][5]. This hawkish pivot, where nine of eighteen members now expect at least one increase, frames the current 0% crowd-implied probability for a cut as consistent with official guidance rather than an outlier [8].

Traders should monitor the July 28–29 and September 15–16 FOMC statements, particularly any updates to the Summary of Economic Projections released in September, which will clarify the median path for rates [3][5]. Recent commentary from Chair Kevin Warsh and rising inflation forecasts of 3.6% suggest the committee views price stability as the priority, reducing the likelihood of easing even if job market weakness emerges [5][8]. Short-term futures now reflect a higher chance of a September hike compared to holding steady, reinforcing the absence of cut expectations [2].

On platform mechanics, Polymarket displays this as 0.00 implied probability with no fees for small trades but requires KYC for larger positions, whereas Kalshi shows decimal odds (1.00) and mandates full identity verification for all users. Betfair and Smarkets offer decimal odds with lower KYC thresholds but higher commission structures on winnings. The divergence in fee models and verification reach means liquidity and execution costs vary significantly across books for this specific Fed event, affecting how traders compare implied probabilities versus true odds.

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

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

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.

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.