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Fed Rate Hike by September 2026 Meeting?

0x73d8a8208d23a74937d114a713d6a56cd4161a1068056c52ac74c8419c99da7c · Economics · 2026-08-13
34%
Agent
31%
Market Price
+3.0%
Edge
58%
Confidence
Volume: 811,448
Spread: 2.0c
Days to resolution: 117
Markets in event: 5
Final Rationale
The only remaining path to Yes is a hike at the Sept 16-17, 2026 meeting, since the July 29 FOMC held 3.50-3.75% by 9-3. The best direct anchor is the identical Polymarket contract at 31% YES with $811K volume, trending down (-4.5pp 7d, -11.5pp 30d) after weak July jobs data; the higher CME FedWatch reads (61.9% on Aug 4, 82% late July) appear to be earlier snapshots from the peak-hawkishness window rather than a genuine live divergence, so I weight the exact-match Polymarket price most heavily while nudging up for hawkish idiosyncrasies. The critique's points 2-3 are fair — a hawkish Chair Warsh, three sitting dissenters already voting to hike, Cook's openness, and a June SEP with 9/19 projecting a 2026 hike mean the coalition gap is small, justifying a level above the ~20-25% historical cut-cycle-reversal base rate. Offsetting this: the majority just voted to hold, unemployment is falling to 4.1% (no overheating labor case), CPI YoY (~2.9%) is tamer than the oil-driven core PCE headline, and an oil retracement is a plausible asymmetric downside for Yes. Net 34% Yes, modestly above the market proxy but well short of making Yes the favorite, with residual uncertainty from unreleased August/September data.
Price vs. prediction
How the market moved after the agent's call. Solid blue line is the actual market price; dashed line is the agent's static forecast at $t{=}0$.
$n = 21$ follow-ups
1. Planner Opus · Fermi decomposition + tool plan
Tools chosen: polymarket_direct polymarket_related kalshi_related fred claude_news gdelt_news code_execution
Sub-questions (Fermi decomposition)
  1. What is the current Polymarket price for 'Fed rate hike by September 2026 meeting', and how has it moved over the last 90 days?
  2. What is the current federal funds target range after the December 2025 FOMC meeting, and what does the latest SEP dot plot imply for 2026 (cuts, holds, or hikes)?
  3. What do Kalshi and CME FedWatch imply about the probability of any rate increase at each 2026 FOMC meeting through September 2026?
  4. Are core PCE/CPI inflation readings accelerating enough (e.g. above 3.5% and rising) to plausibly force a hawkish reversal, and what is the unemployment rate trend?
  5. Have any FOMC participants publicly argued for hikes, or dissented hawkishly, and how does the pending Fed chair succession (Powell term ends May 2026) affect hike risk?
  6. What is the historical base rate for the FOMC reversing from a cutting cycle to a hike within 9 months?
Planner reasoning
This is a Polymarket question on whether the FOMC raises the upper bound of the fed funds target between Dec 16, 2025 and the September 2026 meeting. Base rates for a hike within ~9 months when the Fed is in an easing/hold posture are very low, so the key research is the current market price, inflation/labor data trends, and any hawkish signals (dissents, SEP dot plot, new Fed chair nomination) that could change the path.
2. Research Parallel tool calls
ToolStatusTimeItemsSummary
polymarket_direct OK 0.4s 1 ## This Market's Polymarket Data **Fed Rate Hike by September 2026 Meeting?** - Current price (probability): 31.00% - 7-day price change: -4.50% - 30-day price change: -11.50% - Total volume: $811,448 (USD notional) - Price range: 11.00% - 65.50% - Data points: 90 days
polymarket_related OK 3.0s 1 Scanned 100 active Polymarket markets, kept 1 matches. keyword 'fed rate hike': 1 markets | keyword 'fed decision': 0 markets | keyword 'fed rate cut 2026': 0 markets
kalshi_related OK 2.9s 2 2 related markets / summaries. series KXFED: 0 markets (skipped 87 no-signal) | series KXFEDDECISION: 0 markets (skipped 60 no-signal) | keyword 'fed funds rate': ok | keyword 'rate hike': ok
fred OK 4.9s 6 Fetched 6 FRED series (lookback=730d).
claude_news OK 30.2s 18 ## Key Findings **December 2025 FOMC Decision:** - The Fed delivered a "hawkish cut," lowering its key overnight borrowing rate by a quarter percentage point to a range between 3.5%-3.75% , marking its third cut of 2025 ([CNBC](https://www.cnbc.com/2025/12/10/fed-interest-rate-decision-december-20
gdelt_news OK 160.0s 20 GDELT: 20 articles across 3 queries (lookback=30d). 'Fed rate hike 2026': error GDELT rate-limited after retries (429) | 'FOMC December 2025 decision dot plot': 10 hits | 'Fed officials hike inflation': 10 hits
code_execution OK 156.8s 0 **Historical base‑rate construction (FOMC upper‑bound target, 1990–2024, using ~120 actual target changes)** - **Cut‑triggered windows:** Identified 7 "last cut of an easing cycle" episodes (Sep‑1992, Jan‑1996, Nov‑1998, Jun‑2003, Dec‑2008, Mar‑2020, Dec‑2024). Only **1 of 7 (14.3%)** was followed
3. Evidence Brief Sonnet · 6904 chars
# Current state The Fed funds target range has been 3.50%–3.75% since the July 29, 2026 FOMC meeting (held 9-3, with three regional presidents dissenting *for* a hike); no rate increase has yet occurred within this market's resolution window (Dec 16, 2025 – Sept 2026 meeting completion). The next (and final relevant) meeting is Sept 16–17, 2026; whether a hike happens then is the sole remaining path to "Yes," and market-implied odds for that meeting have been highly volatile (45%–82% per various CME FedWatch snapshots in the last month). # Timeline of key events - **2025-12-10** (confirmed, CNBC): FOMC cuts to 3.50–3.75% ("hawkish cut"), 3 dissents (Miran wanted deeper cut; Schmid/Goolsbee wanted hold); Dec dot plot showed **no hikes** projected for 2026, just one more cut. - **2026-05-13** (confirmed, Congress.gov CRS): Senate confirms Kevin Warsh as Fed Chair, 54-45. - **2026-05-22** (confirmed): Warsh succeeds Powell as Fed Chair; widely characterized as hawkish. - **2026-06** (reported, Yahoo/CNBC): Dot plot flips — cuts off the table, 9 of 19 officials project ≥1 hike in 2026 (6 project multiple hikes); committee pencils in one 25bp hike by year-end. - **2026-07-16 to 07-27** (reported): Oil prices spike (WTI ~$57→peak $113 in April/summer), core PCE rises 3.0%→3.4% (Dec'25→May'26), building hike pressure narrative. - **2026-07-29** (confirmed, CNBC): FOMC holds at 3.50–3.75%, 9-3 vote; Hammack, Kashkari, Logan dissent in favor of a 25bp hike. - **2026-08-04** (reported, FedWatch tracker): CME FedWatch implies 61.9% probability of a 25bp Sept hike. - **2026-08-06** (reported, NY Post): Gov. Lisa Cook says she's ready to hike if inflation stays elevated. - **2026-08-09/10** (reported): Weak July jobs data dents hike expectations; one tracker (Crypto Briefing) shows odds falling to ~45%. # Event Will the FOMC upper-bound target rate be hiked at any point between Dec 16, 2025 and completion of the Sept 2026 meeting? # Outcomes to forecast Yes / No # Kalshi market anchor No direct Kalshi price was returned in research for this ticker (gap). Kalshi-related series (KXFEDFUNDSYEAR long-dated level markets) show no direct read-through. **Best available anchor is Polymarket**, which lists this exact market: **31% YES**, down 4.5pp (7d) and 11.5pp (30d), range 11%–65.5% over 90 days, $811K volume — reflecting sharp round-trip volatility as hike odds surged then partially retreated. # Sub-question answers 1. **Polymarket price/trend** — Currently 31% YES; down from a 90-day high of 65.5% and above a low of 11%; falling over both 7d (-4.5pp) and 30d (-11.5pp), suggesting hike odds have cooled from a July peak (claude_news). 2. **Current target range / SEP implications** — Range is 3.50–3.75% since July 2026 (FRED DFEDTARU=3.75, DFF=3.63). Dec-2025 SEP showed no hikes, one more cut; by June 2026 SEP flipped to 9/19 officials projecting ≥1 hike, one 25bp hike penciled in for year-end (CNBC/Yahoo). 3. **CME FedWatch for Sept 2026** — Highly volatile: 82% (late July peak) → 61.9% (Aug 4) → ~45% (most recent, after weak July jobs data on Aug 10) (claude_news/GDELT). 4. **Inflation/unemployment trend** — Core PCE rose from 3.0% (Dec'25) to 3.4% (May'26), driven by oil price spike to $113/bbl; CPI YoY (FRED CPIAUCSL) ~2.9% (Jul'26 vs Aug'25), less alarming than PCE figure cited in news. Unemployment stable/mildly improving: 4.4%→4.1% (Nov'25→Jul'26, FRED UNRATE) — no labor-market case for hiking. 5. **Hawkish dissents / chair succession** — Three regional presidents (Hammack, Kashkari, Logan) explicitly favored a hike at July 2026 meeting; Gov. Lisa Cook signaled openness to hiking if inflation stays elevated. Kevin Warsh (hawk) became Chair May 22, 2026, succeeding Powell, raising institutional hike propensity (CNBC, NY Post, Kiplinger). 6. **Historical base rate** — Code-execution analysis of 1990-2024 cut-cycle reversals: only 1/7 (14.3%) "last cut" episodes reversed to a hike within 9 months; pooled cut+extended-hold sample gives 6/23 (26.1%); blended estimate ~20-25%. Current episode (mild 3-cut cycle, long pause) most resembles 1996/2003/2019 non-reversal cases. # Key facts (high-confidence, factual) 1. [FRED] Fed funds target range 3.50–3.75% as of Aug 2026, unchanged since July 29, 2026 decision. 2. [CNBC] July 2026 FOMC held 9-3, with 3 dissents favoring a hike. 3. [CRS/Congress.gov] Kevin Warsh confirmed Fed Chair May 13, 2026; took office May 22, 2026. 4. [CNBC/Yahoo] June 2026 SEP dot plot: 9/19 members project ≥1 2026 hike, one hike penciled for year-end. 5. [FRED] Unemployment 4.1% (Jul'26), down from 4.5% (Nov'25) — no hard-landing signal. # Cross-market signals - Kalshi related: No direct price captured; long-dated KXFEDFUNDSYEAR markets show modest upward repricing of terminal rate levels (+3-7pp over 30d) but aren't directly comparable. - Polymarket: This exact market at 31% YES; broader "Fed rate hike in 2026?" market at 54.5% YES (higher, since it covers the full year, not just through Sept). - Sportsbook implied: N/A (not applicable to Fed markets); CME FedWatch serves as functional analog, ranging 45-82% for the Sept meeting specifically in the past month. # Analyst opinions and speculation - Financial media (Fool.com, Businesstimes) frame Warsh as "stuck between a rock and hard place," rebuked by investors wanting a stronger inflation fight — suggests market skepticism he'll actually hike despite hawkish reputation. - Breitbart Business Digest and Hassett (per MoneyTalksNews) argue "no excuse" for a hike, representing a dovish counter-narrative from administration-aligned voices. - Weak July jobs data (reported Aug 10) is already deflating hike odds, indicating data-dependency is genuinely two-sided going into September. # Directional lean per outcome - **Yes**: 3 sitting hawkish dissenters, hawkish new Chair Warsh, June SEP hike projection, oil-driven core PCE at 3.4%, CME FedWatch as high as 45-82% recently. - **No**: Fed just held in July (9-3, majority against hiking), unemployment trending down not up, CPI YoY (~2.9%) less alarming than PCE headline, weak jobs data just cooled hike odds, historical base rate for cut→hike reversal within 9 months is only 14-31%, Polymarket has fallen from 65.5% peak to 31%. # Gaps / unknowns - No direct Kalshi YES price for this specific ticker was retrieved — must rely on Polymarket (31%) as primary market proxy. - Conflicting CME FedWatch readings (45% vs 61.9% vs 82%) across sources/dates — no single authoritative current snapshot. - August/September inflation and jobs data (post Aug 10) not yet available, which will be decisive for the Sept 16-17 meeting. # Calibration anchors - Polymarket YES (proxy anchor): 31%, trending down. - CME FedWatch implied Sept-hike probability: 45-62% (most recent readings, volatile). - Historical base rate for hike within 9 months of a cutting-cycle pause: ~14-31% (blended ~20-25%).
4. Forecasters Opus + GPT · in parallel
claude-opus-5
0.60
Yes 34%
No 66%
The only remaining path to YES is a hike at the Sept 16-17, 2026 meeting, since the Fed held at 3.50-3.75% on July 29 by a 9-3 vote. The best available market anchor is Polymarket's identical market at 31% YES, falling (-4.5pp 7d, -11.5pp 30d) from a 65.5% peak after weak July jobs data; conflicting CME FedWatch reads (45-82%) are stale or measuring different snapshots, so I lean toward the live Polymarket quote while nudging slightly up for the genuinely hawkish setup (Chair Warsh, three dissents for a hike, June SEP with 9/19 projecting a 2026 hike, core PCE at 3.4%). Offsetting factors: the majority just voted to hold, unemployment is falling (4.1%), CPI YoY is a tamer ~2.9%, and the historical base rate for a cut-cycle reversal within nine months is only ~20-25%. Net estimate 34% YES, modestly above the Polymarket proxy to reflect the elevated FedWatch readings and dissent count.
gpt-5.5
0.57
Yes 38%
No 62%
Polymarket, the best available proxy for the missing Kalshi direct price, anchors this at 31% YES and has been trending down, which points toward No because market expectations cooled after weak July jobs data. The June SEP flip, hawkish Chair Warsh, three July dissents for a hike, and Lisa Cook's openness to hiking point toward Yes because there is a plausible voting coalition if inflation remains elevated. However, the July meeting still had a 9-3 majority against hiking, CPI is less alarming than the cited core PCE pressure, and the historical base rate for a cut-cycle reversal within this window is only about 20-25%, all pointing toward No. I move modestly above the 31% market anchor because CME FedWatch readings for the September meeting have recently been materially higher, but not enough to make Yes the favorite given the latest cooling trend and unresolved August/September data.
5. Devil's Advocate Sonnet · red-team critique
1. Both forecasts anchor primarily on Polymarket (31%) and nudge upward to 34-38%, but neither seriously grapples with why Polymarket (31%) and CME FedWatch (45-62% most recent) diverge by 15-30pp — this is a material discrepancy between two "live" market signals that deserves more explicit reconciliation or a wider confidence interval rather than a small nudge. 2. Both cite the historical base rate (~20-25%) as a check but don't note that the current cycle's specific idiosyncratic factors (hawkish Chair installed mid-cycle, oil-driven inflation shock, 3 dissents already voting for a hike) make it a poor match to the "typical" reversal case used in the base-rate sample, potentially warranting more weight on the idiosyncratic path than the historical prior suggests. 3. Neither forecaster addresses the asymmetry in dissent dynamics: three regional presidents already dissented *for* a hike in July, and Cook signaled openness — meaning the swing needed is smaller (just 1-2 more votes) than a "committee flip from scratch," which could argue for higher Yes probability than a simple anchor-and-nudge approach implies. 4. Both forecasts essentially converge (34% vs 38%) despite using slightly different weighting logic, suggesting insufficient differentiation/red-teaming between the two independent analyses — this convergence itself may reflect shared anchoring bias on Polymarket rather than genuine independent verification. 5. Neither forecast discusses the risk that August/September data (unavailable at brief time) could resolve decisively in either direction before the meeting, meaning current point-in-time market snapshots (Polymarket 31%, FedWatch 45-62%) may already be stale by the time the Sept meeting occurs — the brief explicitly flags this as a gap that neither rationale incorporates into uncertainty bounds. 6. Both treat the "Yes" case as requiring inflation to stay elevated, but neither considers the scenario where oil prices (which spiked from $57 to $113) partially retrace, which could rapidly cool core PCE and further collapse hike odds — an asymmetric downside scenario for Yes that isn't weighted in either rationale.
6. Aggregator Opus · final calibrated forecast
34% (58% confidence)
Yes: 34% No: 66%
The only remaining path to Yes is a hike at the Sept 16-17, 2026 meeting, since the July 29 FOMC held 3.50-3.75% by 9-3. The best direct anchor is the identical Polymarket contract at 31% YES with $811K volume, trending down (-4.5pp 7d, -11.5pp 30d) after weak July jobs data; the higher CME FedWatch reads (61.9% on Aug 4, 82% late July) appear to be earlier snapshots from the peak-hawkishness window rather than a genuine live divergence, so I weight the exact-match Polymarket price most heavily while nudging up for hawkish idiosyncrasies. The critique's points 2-3 are fair — a hawkish Chair Warsh, three sitting dissenters already voting to hike, Cook's openness, and a June SEP with 9/19 projecting a 2026 hike mean the coalition gap is small, justifying a level above the ~20-25% historical cut-cycle-reversal base rate. Offsetting this: the majority just voted to hold, unemployment is falling to 4.1% (no overheating labor case), CPI YoY (~2.9%) is tamer than the oil-driven core PCE headline, and an oil retracement is a plausible asymmetric downside for Yes. Net 34% Yes, modestly above the market proxy but well short of making Yes the favorite, with residual uncertainty from unreleased August/September data.
Pipeline Timing
Total pipeline time: 259.0s
Per-tool research timings shown in the Research section above.