Tools chosen: kalshi_direct kalshi_related polymarket_related fred claude_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a far-dated (Dec 2027) FOMC decision market on a tail outcome — a hike larger than 25bps at a single meeting, which has occurred only in exceptional inflation regimes (1994, 2022). The dominant anchor is the Kalshi price itself plus the historical base rate of >25bp hikes and the current market-implied path of the fed funds rate. Research should establish the current policy stance, inflation trajectory, and any regime-shift risk (e.g., new Fed chair, inflation re-acceleration, tariff shock) that could plausibly produce a 50bp+ hike two years out.

# Current state The Fed funds target sits at 3.50–3.75% as of Aug 2026, held steady for five straight meetings after three 2025 cuts; no hike of any size has occurred in this cycle. Kalshi prices the December 2027 ">25bps hike" outcome at 9%, which is a probability for a *specific magnitude at a specific single meeting 16 months out* — far above the historical/statistical base rate, likely reflecting hawkish dot-plot momentum and thin/illiquid pricing rather than a firm consensus. # Timeline of key events - 2025 (multiple meetings): Fed cut rates three times, ending near 3.50–3.75%. (confirmed, FRED/DFF) - 2026-05-15: Kevin Warsh confirmed by Senate (54-45) as 17th Fed Chair, succeeding Powell. (confirmed, Spectrum/Invesco) - 2026-06-17: FOMC holds rates; dot plot shifts hawkish — 2026 median dot 3.8% (up from 3.4% in March); 9 of 18 officials favor further hikes in 2026; 2027 dots disperse widely (3.0%–4.4%). (confirmed, tradingkey/Fed minutes) - 2026-07-07 (approx): June CPI YoY at 3.5%, driven partly by energy/tariff pressure. (reported, claude_news) - 2026-07-29: FOMC holds again; three regional presidents (Hammack, Kashkari, Logan) dissent in favor of a 25bp hike — first hawkish dissents this cycle. (confirmed, CNN) - 2026-08-07: July jobs report shows hiring has "ground to a halt," a dovish counter-signal. (reported, claude_news) - 2026-08-17: CME/Investing.com Fed Rate Monitor shows Dec 2026 meeting odds: 3.50-3.75% 35.2%, 3.75-4.00% 44.8%, 4.00-4.25% 17.8%, 4.25-4.50% 2.1% — market leans toward a single 25bp hike, not jumbo moves. (reported, Investing.com) - JPMorgan (undated 2026): pulled forward hike call to Dec 2026 (hawkish). Morgan Stanley (undated 2026): expects hold then 2027 cuts (dovish). Both houses expect at most 25bp moves. (analyst views) # Event Will the Fed hike rates by more than 25bps at its December 8, 2027 meeting? # Outcomes to forecast - Yes (>25bp hike) - No (≤25bp move, hold, or cut) # Kalshi market anchor KXFEDDECISION-27DEC-H26 "Hike >25bps": **YES = 9%** currently. Up +3% over 7 days, +8% over 30 days — rising fast. Historical range for this contract has been 1%–49% (extremely wide, suggesting thin/volatile order book). Avg daily volume ~3,665 contracts. This is the number to beat. # Sub-question answers 1. **Kalshi price/volume** — 9% YES, trending up (+3%/7d, +8%/30d), volume ~3,665/day, historical range 1–49%. [kalshi_direct] 2. **Historical base rate** — ~3.9% unconditional per-meeting rate since 1990 (11 jumbo hikes /~280 meetings: 1994-95, 2000, 2022); conditional on being in an active tightening cycle, jumbo-hike frequency rises to ~27.5%. [code_execution] 3. **Current rate & path** — Target range 3.50–3.75%, held 5 meetings; CME-implied Dec 2026 pricing favors 3.75-4.00% (44.8%) over holds or bigger moves; Fed minutes' Desk survey median path shows no change through early 2027 then a cut in Q2 2027. [FRED, investing.com, Fed minutes] 4. **Inflation/unemployment data** — CPI YoY ~3.5% (June 2026, energy-driven), core PCE index rising steadily (~130.3 June 2026 vs ~126.4 mid-2025), unemployment stable at 4.1-4.4%, 10yr breakeven inflation only 2.27-2.29% (not signaling inflation panic). Mixed: inflation elevated but breakevens anchored and labor cooling. [FRED, claude_news] 5. **Regime risks** — New Chair Kevin Warsh (confirmed May 2026) is characterized as favoring easing/productivity-led growth by Invesco but "price stability first" by Morgan Stanley — mixed signal. Hawkish dot-plot shift and first hawkish dissents (July 2026) show tail risk building but no jumbo-hike scenario endorsed by any dot or bank. Tariff-driven inflation is cited as an upside risk factor. [claude_news, multiple] 6. **Sibling markets** — Fed funds end-2027 "Above 3.75%" priced at 58% (down 8% 7d, but up 22% 30d) — suggests real chance rates finish 2027 above today's ceiling, consistent with hawkish drift, but doesn't isolate meeting-specific magnitude. No direct Dec-2027 hold/cut/25bp-hike sibling markets were found (only found unrelated Fed personnel markets and long-dated rate-level markets). No clean arbitrage check possible. [kalshi_related] 7. **Polymarket comparables** — None found; scan of 100 active markets returned 0 matches for Fed rate hike/2027 keywords. [polymarket_related] # Key facts (high-confidence, factual) 1. [FRED] Fed funds target 3.50–3.75%, unchanged since ~March 2026. 2. [CNN] Three regional presidents dissented hawkish at July 2026 meeting — first since cutting cycle began. 3. [tradingkey/Fed minutes] June 2026 dot plot median for 2026 raised to 3.8% from 3.4%; 2027 dots span 3.0-4.4%. 4. [code_execution] Only 11 jumbo (>25bp) hikes at FOMC meetings since 1990, clustered in 1994-95, 2000, 2022. 5. [Investing.com] CME market pricing implies at most a 25bp hike is the modal tightening scenario for late 2026, not jumbo moves. # Cross-market signals - Kalshi related: Fed funds end-2027 "Above 3.75%" at 58% (hawkish-leaning level bet), but this doesn't confirm a jumbo single-meeting hike. - Polymarket: no comparable markets exist. - Sportsbook implied: N/A. # Analyst opinions and speculation - JPMorgan: pulled forward next hike call to Dec 2026 (hawkish tilt) — but still describes 25bp increments, not jumbo. - Morgan Stanley: expects hold in 2026, two cuts in 2027 (dovish) — directly opposes a Dec 2027 hike scenario. - Desk survey (Fed minutes): median path = flat through early 2027, cut in Q2 2027. # Directional lean per outcome - **Yes (>25bp hike)**: Supported by hawkish dot-plot drift, dissents, tariff-inflation risk, rising Kalshi price momentum. Opposed by: base rate historically ~1-4% for this specific magnitude/meeting, no analyst or dot plot envisions jumbo hikes, cooling labor market, anchored breakevens, Morgan Stanley/Fed median path pointing to cuts by 2027. - **No**: Overwhelming majority of evidence (historical base rates, CME pricing, dot plots, Desk survey, Morgan Stanley) supports "No" as heavily favored. # Gaps / unknowns - No direct Dec-2027-meeting-specific hold/cut/25bp sibling Kalshi markets found to cross-check. - Warsh's actual policy stance under stress (hawk vs dove) remains uncertain/contested across sources. - Whether tariff-driven inflation escalates into a genuine re-tightening cycle by 2027 is unresolved. # Calibration anchors - Kalshi current YES price: 9% (anchor), rising +8%/30d. - Historical/statistical base rate for a >25bp hike at any given meeting: ~1-4% unconditional; ~27.5% conditional on active tightening cycle (code_execution central estimate: 1.5%). - Precedent: jumbo hikes only occurred in 3 of ~5 tightening cycles since 1990 (1994-95, 2000, 2022).

1. Both forecasts converge on identical 6% estimates and nearly identical reasoning, essentially anchoring to the ~4% unconditional base rate while discounting Kalshi's 9%—but neither seriously grapples with the "conditional on active tightening cycle" base rate of ~27.5% cited in the brief, which is far more relevant if hawkish dissents/dot-plot drift actually signal a new tightening cycle forming under Warsh. 2. Neither forecast addresses the 16-month time horizon adequately: with dots dispersing 3.0%–4.4% for 2027 and Warsh's stance "contested" (hawk per Morgan Stanley, dove per Invesco), there's substantial regime uncertainty between now and Dec 2027 that a static base-rate anchor doesn't capture — a lot could change (e.g., tariff-driven inflation genuinely spiraling) that neither rationale scenario-weights explicitly. 3. Both forecasts ignore the sibling market signal somewhat: "Above 3.75%" at 58% for end-2027 implies real probability mass on rates being meaningfully higher than today, which — combined with a "flat then cut" Desk median path — would require some hiking scenario materializing later in 2027; neither forecast reconciles why this 58% figure doesn't push the Dec 2027 jumbo-hike probability higher than 6%. 4. Neither critiques the possibility that IF a hike does occur, front-loading a jumbo (>25bp) move becomes more likely than incremental 25bp steps if the Fed is playing catch-up late in the cycle (as in 2022) — this conditional-on-hiking magnitude question is underexplored by both. 5. Both forecasts are nearly numerically identical (6% vs 6%) despite different confidence levels (0.62 vs 0.67), suggesting anchoring bias between the two models rather than independent analysis; neither explains why they landed on the exact same figure or what distinguishes their confidence. 6. Neither forecast flags the extremely wide historical Kalshi range (1%-49%) and rising momentum (+8%/30d) as a signal that informed traders might have information/expectations not fully captured in the "historical base rate" framing — the discounting from 9% to 6% is asserted rather than rigorously justified against this momentum signal.

7% (64% confidence)

Yes: 7% No: 93%

A >25bp move at one specific meeting requires two things: (a) the Fed being in an active tightening cycle in Dec 2027, and (b) choosing a jumbo increment rather than the standard 25bp step. Even generously pricing (a) at ~20-25% given hawkish dot-plot drift, three July 2026 hawkish dissents, and the 58% 'above 3.75% end-2027' sibling, (b) is historically ~15-20% (only 11 jumbo hikes in ~280 meetings since 1990, all in catch-up episodes like 1994, 2000, 2022), yielding roughly 4-5%. The critique correctly notes the conditional-tightening base rate deserves weight and that thin-book momentum (+8%/30d, range 1-49%) may carry information, so I nudge above the two forecasters' 6% toward the 9% Kalshi anchor rather than below it. Offsetting hawkish signals are a cooling labor market, 2.27% breakevens, CME pricing that peaks at 25bp increments, and a Desk survey median showing a flat path then a 2027 cut — none of which envision a jumbo move. Final: 7% Yes.

Total pipeline time: 125.1s