Tools chosen: polymarket_direct kalshi_related polymarket_related fred claude_news gdelt_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a Polymarket question on whether the FOMC raises the fed funds upper bound at any point between Dec 16, 2025 and the September 2026 FOMC meeting. The base rate for a hike within ~9 months when the Fed is in an easing/hold cycle is very low, so the key is current market pricing, inflation trajectory, Fed leadership change (Powell's term ends May 2026), and any hawkish repricing. I'll anchor on the Polymarket price, cross-check Kalshi's Fed markets, and pull FRED inflation/rate data plus recent news.

# Current state The Fed has held its target range at 3.50%–3.75% (upper bound 3.75%) since the December 2025 cut, with holds in March, June, and July 2026 FOMC meetings; no hike has occurred yet within the market's Dec 16, 2025–Sept 2026 window. Resolution hinges solely on whether the September 2026 meeting (or an emergency move before it) raises the upper bound above 3.75% — current CME-implied odds for that specific meeting are volatile and roughly a coin-flip-to-below (~39-50% per latest reports), down from a 67% spike in June. # Timeline of key events - 2025-12-10 (confirmed): FOMC cuts 25bp to 3.50%–3.75% (9-3 vote); SEP dot plot shows median 3.4% for end-2026 (one cut), but 3 of 19 members already pencil in a 2026 hike [Fed, CNBC]. - 2026-03-18 (confirmed): FOMC holds; dot plot median unchanged at 3.4% but shifts toward fewer cuts; core PCE forecast raised to 2.7% amid oil-price spike from Iran conflict; no hikes yet penciled in [CNBC]. - 2026-05-22 (confirmed): Kevin Warsh sworn in as 17th Fed Chair after 54-45 Senate confirmation, succeeding Powell; known hawkish reputation [MPA Mag]. - 2026-06-18 (confirmed): Warsh's debut FOMC holds rates at 3.50%–3.75% but delivers hawkish surprise — 9 of 18 participants project a 2026 hike, easing bias stripped from statement; Sept hike odds spike to ~67% (CME) [CNBC, Yahoo]. - 2026-07-29 (confirmed): FOMC holds again at 3.50%–3.75%; 3 dissents; CME hike odds for July had spiked but resolved to a hold; Sept odds ~36% per CME [CNBC]. - 2026-08-07 (reported): Sept hike odds "tumble" after weak July jobs report [CNBC]. - 2026-08-19 (reported): Fed minutes reportedly signal hikes likely "unless inflation comes down" (Forbes), even as cooling July CPI (+0.1% MoM) pushes CME's implied Sept hike probability down to ~39% from ~54% a week earlier — conflicting signals on direction. # Event Will the Fed raise its target federal funds rate at any point between Dec 16, 2025 and the September 2026 FOMC meeting (inclusive)? # Outcomes to forecast Yes / No # Kalshi market anchor No kalshi_direct price was returned in research (gap — only related/adjacent Kalshi series retrieved). Nearest Kalshi proxies (long-dated fed funds level markets, e.g., "end-2034 above 1.75%" at 62%) are not directly informative for a Sept 2026 hike and show low volume (25-48 contracts/day). **Treat this as an unresolved anchor gap; Polymarket is the best available cross-market proxy.** # Sub-question answers 1. **Polymarket price/trend** — Currently 27.5% YES; +5% over 7 days, -24% over 30 days; 90-day range 11%–65.5% (peak likely coincided with June's hawkish Warsh pivot) [Polymarket]. 2. **CME FedWatch trajectory** — No hike priced through Jan–May 2026 holds; probability for a hike spiked to ~67% right after the hawkish June 2026 meeting, eased to ~36% by July, then fluctuated ~39–54% in early-to-mid August as jobs data weakened and CPI cooled [claude_news/CNBC]. 3. **Current target range & recent decisions** — 3.50%–3.75% (upper bound 3.75%) since Dec 2025 cut; held unchanged at March, June, and July 2026 meetings [FRED DFEDTARU/DFF, claude_news]. 4. **Inflation trajectory** — Core PCE index rose from 128.46 (Jan 2026) to 130.27 (June 2026), consistent with ~2.5-2.7% forecasts; CPI index rose steadily (323.3 Aug 2025 → 332.8 July 2026, ~2.9% YoY). SEP core PCE forecast rose from 2.5% (Dec) to 2.7% (March) amid an oil shock. However, July 2026 CPI cooled to +0.1% MoM, and breakeven inflation expectations (T10YIE) remain modest at ~2.3% (Aug 2026), not signaling runaway reacceleration [FRED, claude_news]. 5. **Fed leadership/composition** — Kevin Warsh (hawkish) succeeded Powell as Chair on May 22, 2026. FOMC composition swung hawkish: June 2026 dot plot showed 9 of 18 members projecting a 2026 hike, versus zero in March [claude_news]. 6. **Historical base rate of hikes within 9 months of a cutting cycle** — Not addressed in research; genuine gap (historically rare — Fed reversals from cuts to hikes within under a year are uncommon, e.g., 1966, 1980-81; no data retrieved here). 7. **SEP dot plot for end-2026** — Dec 2025: median 3.4% (one cut). March 2026: unchanged median 3.4% but skewed toward fewer cuts. June 2026: half of participants (9/18) now project a hike, marking a sharp hawkish shift from March [claude_news]. # Key facts (high-confidence, factual) 1. [FRED] Effective/target range currently 3.50%–3.75%, unchanged since Dec 2025. 2. [claude_news/Fed] Warsh confirmed as Chair May 22, 2026; hawkish reputation. 3. [claude_news] June 2026 FOMC: hawkish pivot, easing bias dropped, 9/18 dot-plot hike votes. 4. [claude_news] July 2026 FOMC: held again, 3 dissents. 5. [Polymarket] YES trading at 27.5%, down sharply from 65.5% peak. # Cross-market signals - Kalshi related: no direct Sept-2026-hike ticker found; adjacent multi-year level markets show low volume, limited signal. - Polymarket: 27.5% YES, declining from a mid-year peak (~65.5%) as hike odds eased over July-August. - Sportsbook implied: N/A. - CME FedWatch (via news): ~39–54% implied probability for a Sept hike as of mid-August 2026, fluctuating with data. # Analyst opinions and speculation - Citadel Securities reportedly expects a surprise hike (claude_news). - Forbes (Aug 19) cites Fed minutes suggesting hikes are likely absent inflation improvement. - Warsh himself downplayed reliance on market pricing ("not constrained by market prices") at Jackson Hole, adding uncertainty to near-term guidance. # Directional lean per outcome - **Yes (hike by Sept)**: Hawkish Warsh-led Fed, June dot plot showing half of FOMC penciling a hike, still-elevated core PCE/CPI trend, Fed minutes framing hikes as likely absent inflation improvement. - **No (no hike)**: Three consecutive holds (Mar/Jun/Jul) with no hike enacted yet, cooling July CPI (+0.1%), weak July jobs report, declining Polymarket price (27.5%, down 24pp in 30 days), modest inflation expectations (T10YIE ~2.3%). # Gaps / unknowns - No kalshi_direct price retrieved — anchor missing. - No explicit August/September CME percentage single figure agreed upon (30-54% range reported across dates). - Historical base-rate data (sub-Q6) not researched. - No confirmation of September 2026 FOMC meeting date/outcome (still pending as of last data). # Calibration anchors - Kalshi current YES price: unavailable (gap). - Polymarket YES: 27.5% (best available cross-market anchor). - CME FedWatch Sept-hike odds: ~39% (latest, mid-August 2026), had been as high as 67% in June. - Precedent: Fed hiking within 9 months of a cutting cycle is historically rare; no exact comparable case identified in research.

1. Both forecasters anchor heavily on Polymarket (27.5%) despite the brief noting it's "best available proxy" due to a Kalshi gap—but Polymarket is a thinner, less liquid market than CME FedWatch, and neither forecaster interrogates why they weight the potentially less-informationally-efficient market more heavily than CME's ~39-54% range. 2. Both invoke "historical rarity of cut-to-hike reversal within a year" as a supporting factor for No, yet the brief explicitly flags this as an unresearched gap ("no exact comparable case identified")—citing it as evidence is an unsupported appeal to a base rate neither forecaster actually quantified. 3. Neither forecast reconciles the internal contradiction in the Aug 19 evidence itself: Fed minutes reportedly framing hikes as "likely absent inflation improvement" appeared the same day CPI cooled to +0.1% MoM and CME odds fell to 39% from 54%—this suggests the minutes are stale (reflecting a prior meeting's discussion) and should probably be down-weighted relative to the fresher CPI/jobs data, but both treat it as a live hawkish signal with equal weight. 4. Since only the September meeting remains as a hike opportunity (March/June/July all resolved as holds), this is essentially a single discrete-event probability rather than a trend to be smoothed via averaging cross-market anchors from different weeks—neither forecaster addresses how much the ~15pp spread between Polymarket (27.5%) and CME (39%) should be resolved by proximity to the actual decision date rather than simple weighted averaging. 5. Neither forecast explicitly addresses the "emergency move before it" clause in the resolution criteria as a distinct tail scenario (e.g., an inflation shock forcing an intra-meeting hike), even though Citadel Securities is cited as expecting "a surprise hike"—this scenario deserves separate mention as a low-probability but non-zero upside risk beyond the standard Sept FOMC vote. 6. The two forecasts (28% vs 34%) sit suspiciously close together and both lean toward the lower Polymarket figure rather than the higher CME range, suggesting anchoring bias toward the first-cited number in the brief rather than independent synthesis of the 39-54% CME volatility band, which could argue for a higher central estimate (~35-40%) with wider uncertainty bounds.

30% (56% confidence)

Yes: 30% No: 70%

Only the September 2026 meeting (plus a low-probability emergency move) remains as a hike opportunity after March, June, and July all resolved as holds at 3.50%-3.75%. The dedicated Polymarket contract at 27.5% is the most directly comparable anchor and is the freshest signal (+5pp over 7 days but -24pp over 30), while news-cited CME FedWatch readings of ~39-54% are both stale and derived from rate futures that can embed timing/probability ambiguity; I therefore weight Polymarket most heavily but lift modestly toward CME, as the critique fairly notes both forecasters leaned low and leaned on an unquantified historical base rate. Genuine hawkish upside remains: Warsh's Fed stripped the easing bias, 9/18 dots project a 2026 hike, minutes framed hikes as likely absent inflation improvement, and Citadel reportedly expects a surprise move. But cooling July CPI (+0.1% MoM), a weak July jobs report, and ~2.3% breakevens make it hard for a committee that has passed three times to pull the trigger in September. Final: 30% Yes, slightly above both cross-market lows and the two prior forecasts' midpoint-adjusted range but well below the top CME readings.

Total pipeline time: 340.7s