Tools chosen: kalshi_direct kalshi_related polymarket_related fred claude_news claude_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This asks whether the FOMC will hike by more than 25bps at the December 2027 meeting — a tail event roughly two years out. The dominant inputs are the historical base rate of >25bp hikes (rare: only 2022 and pre-1990s episodes), the current policy stance/direction (Fed has been easing), and market-implied paths. The Kalshi price is the primary anchor; historical base rates and current inflation/rate data set the prior.

# Current state As of late Aug 2026, the Fed funds target sits at 3.50%–3.75% after a Dec 2025 cut and two consecutive holds (Jan–Jul 2026) [FRED/claude_news]. The Dec 2027 meeting is ~16 months away; no hiking cycle is currently underway, though hawkish dissent and a possible single 25bp hike (JPMorgan sees Dec 2026) are being discussed. The Kalshi contract at hand asks specifically whether the Fed hikes by **more than 25bps** (i.e., 50bp+) in one meeting — a distinct, much rarer event than a standard 25bp move. # Timeline of key events - 2025-12: Fed cuts 25bp to 3.50%–3.75% range (confirmed, FRED/claude_news). - 2026-01 to 2026-03: Fed holds steady at 3.50%–3.75% for two consecutive meetings (confirmed, FRED/claude_news). - 2026-05-13: Kevin Warsh confirmed by Senate as 17th Fed Chair, effective 2026-05-22; Powell remains a voting governor (confirmed, CNN/NPR/CNBC). - 2026-06: FOMC dot plot (SEP) shows widened dispersion for 2027 (range 3.0%–4.4%, median ~unchanged from current range); hawkish tilt emerges among some officials favoring cumulative 2026 hikes of 25–75bp spread over multiple meetings, not single jumbo moves (reported, tradingkey/Yahoo). - 2026-07: Fed holds at 3.50%–3.75% for a further consecutive meeting; three members reportedly dissent favoring an immediate hike (reported, Forbes/claude_news). - 2026-07 (forecast): JPMorgan pulls forward its next-hike call to Dec 2026, sized at 25bp (reported). - 2026-08 (ongoing): CME FedWatch/Kalshi pricing show ~98% odds of reaching 4.00%–4.25% by June 2027 via standard 25bp increments; Kalshi cross-market shows ~62% odds of at least one 25bp hike before July 2027 (reported). # Event Will the FOMC hike the federal funds target by more than 25bps at its December 2027 meeting? (KXFEDDECISION-27DEC-H26) # Outcomes to forecast - Yes (>25bps hike at Dec 2027 meeting) - No (25bps or smaller hike, hold, or cut) # Kalshi market anchor **Current YES price: 7%** for Hike >25bps (KXFEDDECISION-27DEC-H26). 7-day change: -1pp; 30-day change: +6pp (rising from a low base). Price range over 24 days of data: 1%–49% (high volatility, likely reflecting thin/early market pricing). Average daily volume: ~3,208 contracts — moderate liquidity. This 7% anchor is well above the model-based base rate (~1%) and should be treated as the consensus to beat. # Sub-question answers 1. **Current Kalshi price/siblings** — >25bps hike market: 7% YES [kalshi_direct]. No direct Kalshi sibling (cut/hold/25bp) data was retrieved for the Dec 2027 meeting specifically; related year-end fed-funds-level markets (2034-2036) exist but are not directly comparable term structures. 2. **Historical frequency since 1990** — Only ~10 of ~272 FOMC meetings (1990–2024) featured a >25bp hike: three in 1994 (50/50/75bp), one in May 2000 (50bp), and six in 2022 (50–75bp each) [code_execution/claude_news]. Unconditional base rate ≈3.7%/meeting; all instances occurred during active inflation-shock hiking cycles, never as an isolated move from an easing regime. 3. **Current fed funds range & FOMC direction** — 3.50%–3.75% as of mid-2026, following a Dec 2025 cut and holds through Jul 2026; Fed is in a hold/possible-early-hike posture, not an active tightening cycle [FRED, FEDFUNDS/DFF series; claude_news]. 4. **Inflation/unemployment risk of re-acceleration** — Core PCE has crept up modestly (126.4→130.3 index, Jul 2025–Jun 2026, ~3% annualized pace implied); CPI similarly drifting higher; unemployment stable at 4.1%-4.4%; 10y breakeven inflation expectations (T10YIE) are contained at ~2.3%, not signaling a 1994/2022-style shock [FRED]. This supports gradual, not jumbo, tightening risk. 5. **Fed funds futures/dot plot implied path** — June 2026 SEP median for end-2027 is roughly flat to current range (3.50–3.75%), with dispersion 3.0%–4.4% across officials; CME/Kalshi markets price ~98% odds of reaching 4.00–4.25% by mid-2027 via sequential 25bp hikes, and ~62% odds of at least one 25bp hike before Jul 2027 — no market or dot-plot signal points to a single >25bp move [claude_news]. 6. **Political/leadership factors** — Warsh (confirmed Fed Chair, effective May 2026) is expected by strategists to lean dovish-continuity despite hawkish rhetoric on inflation; he has stated he won't take orders from the White House despite Trump's preference for lower rates. Powell remains a voting governor. Net effect is toward caution/gradualism, reducing (not raising) probability of jumbo hikes [claude_news/CNN/NPR]. # Key facts (high-confidence, factual) 1. [FRED] Fed funds effective rate flat at 3.63% through Aug 2026; target range 3.50–3.75%. 2. [claude_news] Only 10 FOMC meetings since 1990 saw >25bp hikes, all during acute inflation/bubble episodes (1994, 2000, 2022). 3. [claude_news] Kevin Warsh confirmed Fed Chair, took office 2026-05-22. 4. [FRED] Core PCE inflation trending up modestly but 10y breakevens anchored near 2.3%. 5. [kalshi_direct] Current YES price for >25bp Dec 2027 hike = 7%. # Cross-market signals - Kalshi related: Long-dated fed-funds-level markets (2034-36) show modest hike-consistent pricing but are not term-matched. - Polymarket: No matching markets found (0 hits) — no cross-check available. - Sportsbook implied: N/A. - CME FedWatch (via news): ~98% odds of two sequential 25bp hikes to 4.00–4.25% by mid-2027; no pricing of a single 50bp+ move. # Analyst opinions and speculation - JPMorgan: expects one 25bp hike as early as Dec 2026, not a jumbo move [claude_news]. - Goldman Sachs: doesn't see cuts until H2 2027, implying continued hold/gradual-hike stance [claude_news]. - Strategists broadly expect Warsh to be dovish-continuity despite hawkish talk; some FOMC members (3 of ~12 voters) dissenting toward immediate hikes, but in standard increments. # Directional lean per outcome - **Yes (>25bp hike)**: Opposing dominates — no historical precedent for jumbo hike absent acute inflation shock; current inflation/breakevens contained; dot plot and futures price only sequential 25bp moves; new Chair expected dovish-leaning. Slight upward pressure only from rising hawkish dissent and Kalshi's 30-day +6pp drift. - **No (≤25bp/hold/cut)**: Strongly favored — base rate, regime, futures curve, dot plot, and leadership dynamics all point to gradualism at most. # Gaps / unknowns - No Kalshi sibling market data (cut/hold/25bp) for Dec 2027 meeting specifically to cross-check implied full distribution. - No Polymarket coverage for triangulation. - 16-month horizon leaves substantial uncertainty; an unforeseen supply/inflation shock (tariffs, energy) could not be ruled out but isn't currently priced. # Calibration anchors - Kalshi current YES price: **7%** (anchor, elevated vs. historical base rate). - Model-based (regime-adjusted historical base rate): **~0.5–2%**, point estimate ~1%. - Historical unconditional per-meeting base rate (1990-2024): ~3.7%, but never observed exiting a cutting/holding regime without an intervening inflation shock.

1. Both forecasters land on identical 4.0% YES despite the brief's explicit model-based point estimate of ~1%, and neither clearly justifies why they roughly 4x that base rate—the "shading up for tail risk" reasoning is asserted but not quantified against the 7% Kalshi anchor they're supposedly discounting. 2. Neither forecast grapples with the fact that this is a *specific meeting* (Dec 2027) 16 months out, not a "did it ever happen by then" question—conditioning on hitting exactly that meeting (rather than Oct/Nov/Jan) should push probability well below even the ~1% regime-adjusted base rate, since a jumbo hike could just as easily land on a different 2027 meeting. 3. Both forecasts ignore that the Fed is currently one dovish-leaning chair (Warsh) and near-record-low Fed funds trajectory away from any tightening cycle start—if a hiking cycle were to begin in 2026-2027, historical patterns (1994, 2022) show jumbo moves cluster mid-cycle after initial 25bp moves, making Dec 2027 (potentially 12+ months into any hypothetical new cycle) a plausible window for escalation that neither forecaster explicitly modeled as a scenario, likely leaving true tail risk underweighted rather than overweighted. 4. The brief notes "3 of ~12 voters" already dissenting toward immediate hikes as of Jul 2026 with rising hawkish sentiment (dot plot dispersion up to 4.4% for 2027) — this hawkish tail is only vaguely acknowledged ("slight upward pressure") without any sensitivity analysis on how a further deterioration in core PCE (already trending 3% annualized) could compound with dissent to increase jumbo-hike odds by Dec 2027. 5. Neither forecast interrogates why Kalshi's price is elevated at 7% versus their 4% estimate—if the reasoning is "noisy thin market," they should note the 30-day +6pp drift (rising, not falling) as a potentially informative signal rather than dismissing it purely as noise, especially given moderate ~3,208 average daily volume suggests some real price discovery. 6. Both forecasts are near-identical in number and rationale structure, raising concern about lack of independent triangulation or diversity of reasoning — no scenario analysis (e.g., "what if tariffs/energy shock hits in 2027") is given a distinct probability weight, despite the brief flagging this explicitly as an unresolved gap.

4% (72% confidence)

Yes: 4% No: 96%

A >25bp single-meeting hike has occurred in only ~10 of ~272 FOMC meetings since 1990, always during acute inflation shocks and never as an isolated move out of a hold/easing regime; current conditions (3.50–3.75% target, anchored ~2.3% breakevens, stable unemployment) and pricing (sequential 25bp increments implied by CME/Kalshi, JPMorgan's 25bp call, dovish-continuity Warsh) argue for a low number. The critique's strongest point cuts both ways: conditioning on this specific meeting lowers odds, but if a tightening cycle does begin in 2026–27, Dec 2027 would sit plausibly mid-cycle where jumbo escalations historically cluster (1994, 2022) — plus 3 hawkish dissenters, dot-plot dispersion to 4.4%, and core PCE near 3% annualized keep a real tail alive. The Kalshi 7% anchor is noisy (1–49% range on a thin, early market) but its +6pp 30-day drift with moderate volume is not pure noise, so I discount rather than dismiss it. I therefore settle slightly above both forecasters' 4% and well below the market anchor, at ~4.5% YES.

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