Tools chosen: polymarket_direct kalshi_related polymarket_related fred claude_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This market resolves on whether the July, September, and October 2026 FOMC decisions form a mixed combination (not all the same action). The key inputs are per-meeting cut/pause/hike probabilities from fed funds futures and prediction markets, plus the macro backdrop (inflation, employment) shaping the Fed's path. I anchor on the Polymarket price, triangulate with Kalshi's per-meeting Fed markets, pull macro data from FRED, get news on Fed guidance, and use code execution to combine per-meeting probabilities into P(mixed sequence).

# Current state The July 28-29 FOMC decision is already known: the Fed held the funds rate at 3.50-3.75% (9-3 vote, three dissents favoring a hike) — the first of the three meetings is a confirmed **PAUSE**. Because "different" resolves YES if the three decisions are not all identical, the market now effectively hinges on whether September and/or October break from that July pause (most likely via a hike, given hawkish repricing since Jackson Hole). # Timeline of key events - **2026-07-29** (confirmed): FOMC holds rate at 3.50-3.75%; 9-3 vote; Hammack, Kashkari, Logan dissent in favor of a 25bp hike — fifth consecutive hold. [federalreserve.gov, CNBC] - **2026-08-28** (reported): Fed Chair Kevin Warsh delivers hawkish Jackson Hole speech citing core PCE inflation at 3.7% y/y (4.1% annualized over 6 months); September hike odds jump from ~35% to ~59% per CME data. [Benzinga, CNBC] - **2026-08-30/31** (reported): Analyst split emerges — Deutsche Bank forecasts hikes at both September and December; JPMorgan's David Kelly argues markets are premature in pricing ~60% hike odds given softening labor data. [CNBC] - **2026-09-01** (reported): CME FedWatch hike probability for September rises further to >66%. [cryptobriefing.com] - **2026-09-15/16** (pending): Second FOMC decision — outcome undetermined at time of research. - **2026-10-27/28** (pending): Third FOMC decision — outcome undetermined, highly contingent on September outcome and Q3 data. # Event Will the FOMC's three decisions across the Jul 28-29, Sep 15-16, and Oct 27-28, 2026 meetings NOT all be identical (any mix of hold/cut/hike differing across meetings) — resolving YES — versus all three being the same decision — resolving NO? # Outcomes to forecast - Yes (decisions differ across the three meetings) - No (all three decisions identical) # Kalshi market anchor No direct Kalshi price for this specific ticker was returned by kalshi_direct in this research pass (kalshi_related searches for "FOMC July/Sept/Oct 2026" returned no matching FOMC-specific markets — only unrelated series). **Primary usable cross-market anchor is Polymarket: YES trading at 67.5%**, up from ~40% a month ago (30d change +10.5pp, 7d change +7pp), on volume of $317K — the rally aligns with the post-Jackson Hole hawkish repricing (Aug 28 onward). Range over 79 days: 38.5%–72.5%. # Sub-question answers 1. **CME FedWatch odds by meeting** — July: resolved hold. September: hike odds spiked from ~35% (pre-Jackson Hole) to 59-66% by Sept 1 following Warsh's hawkish speech; no explicit October reading yet, but October is described as highly contingent on September's outcome. [Benzinga, cryptobriefing.com] 2. **Kalshi vs Polymarket individual FOMC markets** — No Kalshi FOMC-decision-specific market data was retrieved (kalshi_related returned no-signal). Cannot directly compare; Polymarket's own aggregate ("differ") market is the only cross-market read available (67.5% YES). 3. **Fed forward guidance/SEP** — June 2026 dot plot shifted hawkish: markets now price two 25bp hikes in 2026 with no further moves through 2027, a reversal from earlier-year cut expectations. Warsh (Jackson Hole) stressed inflation persistence and no explicit rate commitment, but signaled skepticism that underlying trends have improved. [advisorperspectives.com, Kalshi news] 4. **Inflation/labor trends** — Core PCE running ~3.7% y/y per Warsh (well above 2% target); CPIAUCSL and PCEPILFE (FRED) show steady monthly increases through July 2026. Unemployment fell slightly to 4.1% (July) from 4.4% (Dec 2025); July payrolls report showed job losses, tempering hike conviction before Jackson Hole reversed it. August jobs report (due before Sept meeting) expected +55k, unemployment holding 4.1% — a pivotal data point. [FRED, Forbes] 5. **Combined probability from per-meeting odds (independence)** — Using placeholder marginals (Jul resolved hold; Sep ~45/53/2 hold/hike/cut-type split; Oct ~40/58/2), independence model gives P(all identical)=26.3% → YES≈73.7%. [code_execution] 6. **Historical base rate** — 2000-2025 rolling 3-meeting windows: all-three-identical occurred 69.1% of the time (141/204), dominated by long hold/ZIRP stretches; excluding 2009-2014 ZIRP period, rate drops to 59.6% same → YES≈40.4%. [code_execution] # Key facts (high-confidence, factual) 1. [Fed/CNBC] July 29, 2026: FOMC held at 3.50-3.75%, 9-3, three hawkish dissents. 2. [FRED DFF/DFEDTARU] Current effective/target rate unchanged since July decision (3.63% effective, 3.75% upper bound) through Sept 1-2 data. 3. [Benzinga/CNBC] Aug 28 Jackson Hole: Chair Warsh hawkish speech; Sept hike odds jumped 35%→59%. 4. [cryptobriefing] Sept 1: hike odds >66% per CME. 5. [FRED] Core PCE (PCEPILFE) and CPI rising steadily each month through July 2026; unemployment 4.1% (July), down from cycle highs but still elevated vs early 2025. # Cross-market signals - Kalshi related (FOMC-specific): no usable data returned. - Polymarket (this event): 67.5% YES, sharp uptrend since Jackson Hole. - Sportsbook implied: N/A (not applicable to Fed decisions); CME FedWatch serves as functional equivalent — currently 59-66% hike for September. # Analyst opinions and speculation - Deutsche Bank: expects hikes in both September and December (implies an October hold sandwiched between hikes — consistent with a "differing" sequence). - JPMorgan (David Kelly): skeptical of 60% September hike pricing, cites softening labor momentum — argues market may be overreacting to Warsh. # Directional lean per outcome - **Yes (differ)**: Supported by resolved July hold + sharply rising September hike odds (35%→66%) post-Jackson Hole; any hike in Sept or Oct breaks the "all-hold" pattern definitively. Polymarket pricing (67.5%) and independence-based modeling (~74%) both lean YES. - **No (all same)**: Supported by historical base rate (59-69% same-decision rate), strong policy inertia/correlation models (ρ=0.5-0.7 implies YES only 46-57%), and skeptic view (Kelly) that hike pricing is overdone given weak labor data; a full three-meeting hold streak remains historically the modal outcome. # Gaps / unknowns - No direct Kalshi YES price captured for this exact ticker — anchor relies on Polymarket only. - No Kalshi single-meeting FOMC markets found for comparison. - August jobs report (pivotal per Forbes) result not in dataset — could swing September pricing further before the meeting. - Actual September and October decisions unresolved as of research cutoff. # Calibration anchors - Polymarket YES (proxy anchor): 67.5%, up from ~40-50% a month ago. - Independence-model estimate: ~74% YES. - Correlation-adjusted (ρ=0.3-0.5): ~57-65% YES. - Historical base rate (2000-2025, ex-ZIRP): ~40-45% YES; full-period including ZIRP: ~31% YES.

1. Both forecasts converge almost exactly on the Polymarket anchor (0.70 and 0.69), suggesting insufficient independent triangulation—neither seriously engages with the correlation-adjusted estimate (57-65% YES) or the ex-ZIRP historical base rate (only ~40-45% YES), both of which are far below their landed probabilities; the "modest shading toward NO" language undersells how large that gap actually is. 2. Neither forecaster grapples with the June dot plot detail that markets price "two 25bp hikes in 2026 with no further moves through 2027" — since July was a hold, this implies the two expected hikes are distributed across Sept, Oct, AND December (outside the window), meaning it's plausible only one hike lands in Sept/Oct and the other slips to December, which actually *reduces* the odds of a differing Sept-vs-Oct split beyond the July hold and deserves explicit modeling rather than being treated as pure upside for YES. 3. Both treat the pending August jobs report as a caveat rather than a real source of forecast uncertainty — the brief flags it as "pivotal" and unresolved at research cutoff, yet neither forecaster discounts confidence or widens uncertainty bands to reflect that CME's 59-66% September hike pricing could reverse sharply on a single data surprise (as it already did once, from 35% to 59-66%, in the other direction post-Jackson Hole). 4. Neither forecast seriously considers a hold-hold-hold NO outcome consistent with JPMorgan's Kelly view (softening labor data, hike pricing overdone) as anything more than a minor headwind, despite this being the single scenario needed for NO and matching the historically modal outcome (69% same-decision base rate over 2000-2025). 5. Both forecasters explicitly acknowledge no direct Kalshi price exists for this ticker and default to Polymarket, but neither flags that Polymarket's own 30-day range (38.5%-72.5%) shows this specific market has been highly volatile and sentiment-driven (a +27pp swing in under three months), which should argue for wider uncertainty/lower confidence than the tightly-clustered 0.69-0.70 point estimates convey. 6. Neither addresses the small but nonzero cut-probability tail (~2% per meeting per the independence-model marginals) — while immaterial to the YES/NO split directionally, ignoring it means neither forecaster explicitly considered scenarios like a surprise cut following a weak jobs report, which would also resolve YES and reinforces that the case for YES may be even more robust than their point estimates suggest, an asymmetry both missed.

69% (65% confidence)

Yes: 69% No: 31%

July is a confirmed hold, so YES requires only that September or October break the pattern; CME prices a September hike at 59-66% alone, giving two independent paths to YES. The critique correctly notes forecast volatility (Polymarket swung 38.5%-72.5%) and the pending August jobs report, but these argue for staying near rather than above the market anchor, not for a large NO shift — the correlation-adjusted model (57-65%) and Polymarket (67.5%) bracket the reasonable range while the ex-ZIRP base rate is a weak prior in a hawkish repricing regime with three July hike dissents and a dot plot showing two 2026 hikes. NO requires the single hold-hold-hold path against 60%+ Sept hike pricing, which even Kelly-style labor skepticism only partially discounts. I land at 0.69, between the market anchor and the independence model, close to both forecasters whose reasoning survived the critique.

Total pipeline time: 231.6s