Scan: Fed Rate Hike by September 2026 Meeting?

date	predicted	market price	confidence
2026-09-03	62%	54%	62%
2026-08-27	33%	34%	58%
2026-08-20	30%	28%	56%

1. Planner Fable 5.1 · Fermi decomposition + tool plan

Tools chosen: polymarket_direct polymarket_related kalshi_related fred claude_news article_search code_execution

Sub-questions (Fermi decomposition)

What is the current Polymarket YES price and its recent trend for a Fed hike by the September 2026 meeting, and what do sibling markets (hike by June/July/December 2026, cut probabilities) imply?
What do fed funds futures / CME FedWatch currently imply for the probability of any rate hike at FOMC meetings in Jan–Sep 2026 versus further cuts or holds?
What is the recent trajectory of core PCE / CPI inflation and inflation expectations (T10YIE), and is there evidence of re-acceleration that could force a hike?
What is the state of the labor market (unemployment rate, payrolls) — is it loosening (supporting cuts/holds) or tightening?
What did the December 2025 FOMC Summary of Economic Projections (dot plot) show for the 2026 fed funds path, and have any FOMC participants publicly discussed hikes as a live option?
Historically, how often has the Fed hiked within 9 months of its last rate cut, and what macro conditions accompanied such reversals?
Who will chair the Fed after Powell's term ends in May 2026, and does the likely successor's stance make hikes more or less likely?

Planner reasoning

This is a Polymarket question about whether the Fed raises the upper bound of the fed funds target range at any FOMC meeting (or emergency action) from Dec 16, 2025 through the September 2026 meeting. The base rate for a hike following an easing cycle within ~9 months is low, so the key drivers are the current market anchor, inflation trajectory (tariff pass-through), labor market data, FOMC dot plot/communications, and futures-implied probabilities. Cross-checking against Kalshi fed markets and Polymarket sibling markets (hikes by earlier/later meetings, cuts) will triangulate.

2. Research Parallel tool calls

tool	status	time	items	summary
polymarket_direct	OK	0.3s	1	## This Market's Polymarket Data Fed Rate Hike by September 2026 Meeting? - Current price (probability): 87.50% - 7-day price change: +34.00% - 30-day price change: +57.00% - Total volume: $1,714,065 (USD notional) - Price range: 22.50% - 88.50% - Data points: 90 days
polymarket_related	OK	0.2s	9	Scanned 100 active Polymarket markets, kept 9 matches. keyword 'fed rate hike': 3 markets \| keyword 'fed rate cut': 0 markets \| keyword 'fed decision': 0 markets \| keyword 'FOMC': 6 markets
kalshi_related	OK	4.4s	2	2 related markets / summaries. series KXFED: 0 markets (skipped 87 no-signal) \| series KXFEDDECISION: 0 markets (skipped 60 no-signal) \| series KXFEDHIKE: 0 markets (skipped 3 no-signal) \| keyword 'fed rate hike': ok \| keyword 'fed funds': ok
fred	OK	6.1s	6	Fetched 6 FRED series (lookback=400d).
claude_news	OK	29.7s	16	## Key Findings: Fed Rate Hike Outlook for September 2026 Successor confirmed — Kevin Warsh is now Fed Chair - Kevin Warsh was sworn in as Fed Chair, succeeding Powell whose term ended in May 2026. Trump spoke with the new chairman of the Federal Reserve, Kevin Warsh, after a swearing-in cerem
article_search	OK	5.2s	31	Fetched 31 unique articles across 4 queries (lookback=45d). 'Fed rate hike 2026 probability': 10 articles \| 'FOMC dot plot 2026 fed funds projection': 10 articles \| 'core PCE inflation tariffs reacceleration Fed': 10 articles \| 'Fed chair nominee Powell successor rate policy': 10 articles
code_execution	OK	41.8s	0	## Key Findings Historical base rate (1990–2025 easing cycles → hike within 9 months of last cut) - 1995–96 cycle: last cut Jan 1996 → next hike Mar 1997 = 13.8 months (no) - 1998 cycle: last cut Nov 1998 → next hike Jun 1999 = 7.4 months (YES — only historical hit) - **2001

3. Evidence Brief Sonnet 5 · 6972 chars

# Current state As of Sept 15, 2026 (one day before the Sept 16 FOMC decision that resolves this market), the fed funds target range remains 3.50–3.75% (FRED DFEDTARU=3.75, unchanged since Dec 2025) — no hike has occurred yet in the Dec 16 2025–present window. Market-implied hike odds for the Sept 16 meeting have surged to ~87-90% (Polymarket, CME FedWatch) after hot August CPI/PPI data, up sharply from a coin-flip a week earlier and from ~33-45% in early August after a weak jobs report. # Timeline of key events - 2025-12-10 (confirmed): Dec FOMC cuts to 3.50–3.75%; SEP dot plot shows median 3.4% for end-2026 but wide dispersion (3 hike votes, 4 no-change, rest favoring further cuts). [CNBC/Macro4Micro] - 2026-05-22 (confirmed): Kevin Warsh sworn in as Fed Chair, succeeding Powell. [CNBC] - 2026-06 (confirmed): June SEP shifts hawkish — 3 participants project +25bp hike, 5 project +50bp by year-end 2026; 2026 PCE inflation projection raised to 3.6%, GDP growth cut to 2.2%. [Bondsavvy] - 2026-07-29 (confirmed): FOMC holds at 3.50–3.75% by 9-3 vote; three regional presidents (Hammack, Kashkari, Logan) dissent in favor of a hike. [CNBC] - 2026-08-07 (confirmed): Weak July jobs report drops Sept hike odds to ~33-45% (fed funds futures). [CNBC] - 2026-08-19 (confirmed): July minutes show "many participants" saw tightening as likely necessary if inflation didn't decline. [CNBC/Fed] - 2026-09-05 (reported): Trump administration (President, VP, Treasury Sec.) publicly pressures Warsh/Fed against hiking. [CNBC] - 2026-09-10 (confirmed): Hot PPI + oil >$100/bbl push CME FedWatch hike odds to ~70-71%; Dec hike odds also rise to ~60%. [CNBC] - 2026-09-14/15 (confirmed): August CPI/core inflation pickup pushes hike odds to ~88-90% across trackers. [Boston Globe, CBS News] - 2026-09-16 (pending): FOMC decision — the resolving event. # Event Will the Fed's upper-bound target rate be hiked at any point between Dec 16, 2025 and the Sept 2026 FOMC meeting (inclusive)? # Outcomes to forecast Yes / No # Kalshi market anchor No Kalshi-direct quote was returned for this specific ticker (only tangential long-dated Kalshi fed-funds-level markets for 2034-36 were found, prices 26-79% but not comparable). **Best available direct price anchor is Polymarket**: current YES = **87.5%**, up +34pts (7d) and +57pts (30d), range 22.5%-88.5% over 90 days, volume $1.71M. Sibling Polymarket market "Fed rate hike in 2026?" trades at 95.5% YES; "hike by Oct 2026" at 91%; explicit "25bp hike after Sept meeting" contract also at 87.5% (essentially the same event), "no change" contract at 11.5%, "50bp+ hike" near 1%, cut contracts near 0%. # Sub-question answers 1. **Polymarket YES/trend & siblings** — 87.5% YES, +34pt(7d)/+57pt(30d) surge; Oct 2026 sibling at 91%, full-2026 sibling at 95.5%; cut-focused siblings near 0%, confirming market has converged on "hike, not cut" as the 2026 path. [Polymarket] 2. **CME FedWatch for Jan–Sep 2026** — Odds swung widely: coin-flip in early Aug, ~33-45% after weak jobs (Aug 7), rebounding to ~70-71% (Sept 10 CPI/PPI) and ~88-90% by Sept 14-15 after hot inflation data. No meaningful cut probability priced for Sept. [CNBC, Boston Globe, Vantage Markets] 3. **Inflation trajectory** — Core PCE index (PCEPILFE) rose steadily each month from 126.7 (Aug-25) to 130.66 (Jul-26), implying a re-accelerating ~3%+ annualized pace; CPI/core CPI also climbing monthly. July FOMC minutes cite total PCE 4.1%/core 3.4% y/y in May, driven by tariffs, Middle East energy costs, AI-buildout demand. T10YIE breakevens modestly elevated (~2.35-2.40%). [FRED, Fed minutes] 4. **Labor market** — Mixed: a weak July jobs report (Aug 7) briefly deflated hike odds, but "resilient" job growth through much of 2026 has since been cited as reducing the risk case for holding. No unemployment-rate series was returned directly. [CNBC] 5. **Dot plot / FOMC hawks** — Dec-25 dot plot had only 3/16 members favoring a 2026 hike; June-26 SEP flipped hawkish with 3 for +25bp and 5 for +50bp by year-end. July-26 minutes: "many participants" saw tightening as likely necessary; three regional Fed presidents (Hammack, Kashkari, Logan) explicitly dissented for a hike. [CNBC, Bondsavvy] 6. **Historical base rate** — Across 1995-2019 easing cycles, only 1998→1999 saw a hike within 9 months of the last cut (1/5 completed cycles, 20%); hazard-model estimate ~7-19% depending on assumed per-meeting hazard. This purely historical base rate (~10-20%) is now sharply superseded by 2026-specific evidence. [code_execution] 7. **Fed Chair succession** — Kevin Warsh confirmed sworn in May 22, 2026 as Fed Chair, replacing Powell; widely characterized as hawkish, and economists argue he "will have to hike or risk undermining credibility" given his tough inflation rhetoric — a structural shift raising hike probability versus a Powell-led Fed. [CNBC, Boston Globe] # Key facts (high-confidence, factual) 1. [FRED] Target range upper bound (DFEDTARU) = 3.75% through Sept 15, 2026 — no hike yet. 2. [CNBC] July 29, 2026 FOMC held rates 9-3 with three hawkish dissents. 3. [CNBC] Aug 19, 2026 minutes flagged tightening as "likely necessary" if inflation persists. 4. [Boston Globe, CBS] By Sept 14-15, 2026 trackers price 84-90% hike probability for Sept 16 meeting. 5. [CNBC] Warsh sworn in as Fed Chair May 22, 2026. # Cross-market signals - Kalshi related: no direct series found; only unrelated long-horizon fed-funds-level markets (2034-36). - Polymarket: headline market 87.5% YES; "25bp hike" sibling same level; "no change" 11.5%; broader "hike in 2026" 95.5%; "hike by Oct 2026" 91%. - Sportsbook implied: N/A. # Analyst opinions and speculation - Goldman Sachs (post-July FOMC): September hike "finely balanced," contingent on Middle East developments and next two CPI prints. - LPL Financial's Roach: entrenched inflation pressures from Iran conflict/oil are the key catalyst. - Economists (Boston Globe): Warsh likely hikes despite Trump pressure to preserve market credibility. # Directional lean per outcome - **Yes**: Hawkish Warsh chairmanship, three dissenting hawks, hot Aug CPI/PPI, rising core PCE trend, near-90% market pricing, June SEP hawkish shift — strong support. - **No**: Historical base rate for post-cut hikes is low (~15-20%); a weak July jobs report shows labor fragility; intense White House political pressure; some inflation moderation possible before Sept 16 print. Weaker support given late-breaking data. # Gaps / unknowns - No official unemployment rate series retrieved directly. - No confirmed outcome of the Sept 16, 2026 meeting itself (still pending as of data cutoff). - No true Kalshi-direct price for this exact ticker was available. # Calibration anchors - Polymarket YES (best available direct anchor): 87.5%, trending up sharply. - Historical base rate (hike within 9 months of last cut): ~15-20% (now superseded by real-time data). - CME FedWatch (Sept 14-15, 2026): ~88-90% hike probability.

4. Forecasters Fable 5.1 + GPT-5.6 Sol · in parallel

claude-fable-5-1

62% conf

Yes	87%
No	13%

No hike has occurred yet (DFEDTARU still 3.75%), so resolution hinges entirely on the Sept 16 FOMC decision one day away. The best direct anchor (Polymarket 87.5%, CME FedWatch ~88-90%) has surged after hot August CPI/PPI and oil >$100, and is corroborated by three hawkish dissents in July, minutes flagging tightening as 'likely necessary,' a hawkish June SEP, and a Warsh chairmanship whose credibility is staked on inflation. The Fed almost never surprises when markets price an action near 90% the day before, so I stay close to the anchor; residual No risk comes from intense White House pressure on Warsh, labor-market softness from the weak July jobs report, and the historical rarity of hikes shortly after cuts. Net: ~0.87 Yes.

gpt-5.6-sol

82% conf

Yes	88%
No	12%

The best direct anchor is Polymarket at 87.5% YES, corroborated by CME FedWatch at roughly 88-90% one day before the decision and by sibling markets strongly favoring a hike over a cut. Reaccelerating inflation, including hot August CPI/PPI and a persistent 3%+ core PCE pace, points toward Yes despite mixed labor-market evidence. The June dot plot's hawkish shift, three July dissents favoring a hike, minutes saying tightening may be necessary, and hawkish Chair Kevin Warsh all reinforce that outcome. The low historical post-cut hike base rate and White House pressure provide downside risk, but current meeting-specific evidence substantially outweighs those considerations.

5. Devil's Advocate Sonnet 5 · red-team critique

Both forecasters anchor almost exactly to the Polymarket/CME price (87-88%) without adjusting for the fact that FOMC decisions are binary/discrete events where markets pricing 85-90% the day before are historically right nearly all the time (arguably closer to 95%+ in modern Fed-communication era) — neither explains why they shade down 2-3 points from the anchor rather than up, given the Fed's near-perfect record of not surprising markets pre-meeting since forward guidance became standard practice.

Neither forecaster addresses the "25bp vs 50bp vs hold" outcome structure explicitly — the brief notes "50bp+ hike" priced near 1% and the event as framed (any hike between Dec 2025-Sept 2026) would resolve Yes under either magnitude, but this nuance is glossed over rather than confirmed as irrelevant to the binary resolution.

Both underweight the specific political-pressure scenario: the brief flags "Trump administration... publicly pressures Warsh/Fed against hiking" on 2026-09-05, yet neither forecast seriously engages with the possibility that political pressure could cause a last-minute compromise (e.g., hawkish hold with strong forward guidance) rather than an actual hike — this is a distinct tail scenario from generic "White House pressure" mentioned only as a vague residual.

Forecast 2 claims confidence=0.82 but gives a nearly identical probability (0.88) to Forecast 1 (confidence=0.62) — the confidence scores are inconsistent with the near-identical rationales and evidence base; neither justifies why their confidence level differs so much despite converging on the same number.

Neither forecaster flags the risk of "hot data reversal" — the timeline shows odds swinging from ~90% (early Sept) down to 33-45% (Aug 7) and back up to 88-90% within six weeks, demonstrating the market's own volatility/whipsaw behavior; this pattern of large swings on a single data print suggests the 87-90% anchor could still be somewhat overconfident 24 hours out, a point neither forecast explicitly weighs before near-fully endorsing the anchor.

Both forecasts treat the Dec-2025-to-Sept-2026 window as effectively decided solely by the Sept 16 meeting, but technically a hike could also have occurred at an interim unscheduled action or the July 29 meeting outcome (confirmed hold) — worth noting explicitly that the July hold already foreclosed any earlier resolution, which neither forecast states outright as ruling out alternate hike timing within the window.

6. Aggregator Fable 5.1 · final calibrated forecast

87% (72% confidence)

Yes: 87% No: 13%

No hike has occurred since Dec 2025 (DFEDTARU still 3.75%, July hold confirmed), so resolution depends entirely on the Sept 16 FOMC decision one day away. Market pricing (Polymarket 87.5%, CME FedWatch ~88-90%) has converged on a hike after hot August CPI/PPI and oil >$100, and is backed by three July hawkish dissents, minutes flagging tightening as likely necessary, a hawkish June SEP, and a Warsh Fed whose credibility is tied to inflation. The critique's point that the Fed rarely surprises against ~90% pricing argues for shading up, but the sharp whipsaw in odds over six weeks, explicit White House pressure against hiking, labor-market softness, and the fact that the surge occurred inside the blackout period (limiting Fed confirmation) argue for keeping some residual No mass. I settle essentially at the market anchor, ~0.87 Yes.

Pipeline Timing

Total pipeline time: 150.5s

Per-tool research timings shown in the Research section above.