Tools chosen: polymarket_direct polymarket_related kalshi_related fred claude_news gdelt_news code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This asks whether the FOMC will HIKE 25bps at the Dec 8-9, 2026 meeting — a low-base-rate outcome given the Fed's current easing cycle. Key drivers: current fed funds level, inflation trajectory, market-implied path (futures/other prediction markets), and Fed leadership changes (Powell's term as chair ends May 2026). I'll anchor on the Polymarket price, triangulate with Kalshi's KXFED series, and pull macro data plus news on the 2026 policy outlook.

# Current state The FOMC has held the fed funds target range at 3.50%–3.75% (upper bound 3.75%, per FRED DFEDTARU as of 2026-08-21) since December 2025, through March, April, June, and July 2026 meetings. This market resolves solely on the outcome of the December 8-9, 2026 meeting; no hike has occurred yet in 2026, though hawkish dissent and dot-plot signals point to elevated (but contested) hike risk at either the September or December meeting. # Timeline of key events - 2025-12: FOMC sets range at 3.50–3.75% (baseline for this cycle) — confirmed (FRED). - 2026-03/04/06/07: FOMC holds rate unchanged at each meeting — confirmed (claude_news). - 2026-06: June dot plot shows 9 of 18 officials projecting ≥1 hike by year-end 2026, 8 projecting unchanged, 1 projecting a cut — confirmed (claude_news/CNBC minutes). - 2026-07-08: June minutes show Fed unlikely to cut in 2026; Iran conflict cited as inflation risk — reported (Forbes). - ~2026-mid: Kevin Warsh installed as Fed Chair, replacing Powell (who remains a Governor) — confirmed by multiple outlets, exact transition date not specified in research. - 2026-07-24: Reports that July-hike odds "tripled" over prior week — reported (Fool.com). - 2026-07-29: FOMC votes 9-3 to hold at 3.50–3.75%; Hammack (Cleveland), Kashkari (Minneapolis), Logan (Dallas) dissent in favor of a hike — confirmed (CNBC, CNN, Schwab). - 2026-07-30: Dissent characterized as largest since 1970 under a new chair — reported (Hindu Business Line). - 2026-08-14/17: Commentary split — inflation "sinister metric" persists (Fool.com) vs. Goldman Sachs arguing markets are "too hawkish" on hike pricing (Hindu Business Line). - 2026-08-19: Fed minutes reported to signal hikes likely "unless inflation comes down" — reported (Forbes). - Scheduled: Next FOMC meeting Sept 15-16, 2026 — confirmed; seen by analysts as more likely venue for any 2026 hike than December (Schwab). # Event Will the FOMC raise the federal funds target range by 25 bps (upper bound) following its December 8-9, 2026 meeting, versus the pre-meeting level? # Outcomes to forecast Yes (25 bps hike) / No (no change, cut, or ≥50 bps treated per rounding rules — effectively "not a 25bp hike") # Kalshi market anchor No kalshi_direct quote was returned for this ticker in the research (gap). Related Kalshi markets are only long-dated year-end fed-funds-level contracts (2034-2036), not usable as a direct proxy. Best available anchor is the identical-question Polymarket market: **28.5% YES** (as of latest snapshot), up +3pts over 7 days but down -9pts over 30 days; range 25.5%–38.5% over 23 days; volume $56.4k. # Sub-question answers 1. **Polymarket price/trend** — 28.5% YES, +3% (7d), -9% (30d), trading range 25.5–38.5% (polymarket_direct). 2. **Current range & 2026 path** — Range held at 3.50–3.75% since Dec 2025 through July 2026 (five consecutive holds); no hikes or cuts enacted in 2026 to date (claude_news, FRED). 3. **Futures/Kalshi implied** — CME FedWatch (April 2026 snapshot, pre-July dissent): Dec 2026 priced ~78% no-change, ~15% cut, ~5% hike; post-July dissent, Sept-hike odds spiked to 60% then reportedly cooled by mid-Aug (claude_news). No live Kalshi quote available for Dec market itself (gap). 4. **Inflation/unemployment trajectory** — Core PCE index (PCEPILFE) rising steadily (126.4→130.3, Jul'25–Jun'26), core CPI also rising (323→333); unemployment stable/slightly declining, 4.1% in July 2026 vs 4.4% in Feb 2026 (FRED). Officials note inflation above 2% target for 5+ years (CNBC). 5. **Fed leadership** — Kevin Warsh is Fed Chair (Powell remains a Governor); Warsh described as navigating a "no-win scenario" amid record dissent pressure from hawkish regional presidents; his own policy stance appears cautious/hold-leaning relative to hawkish dissenters (claude_news, Fool.com). 6. **Historical base rate** — Unconditional ~14.4% per meeting (1994-2026 dataset); conditional on trailing 12 months of cuts/holds (current regime), only ~3.3% historically produce a 25bp hike (code_execution). # Key facts (high-confidence, factual) 1. [FRED] Upper bound target rate = 3.75% as of 2026-08-21; unchanged since Dec 2025. 2. [claude_news/CNBC] July 29, 2026 FOMC vote: 9-3 hold, three regional presidents dissented for a hike — largest hawkish dissent under a new chair since 1970s comparisons. 3. [claude_news] June 2026 dot plot: 9/18 officials project ≥1 hike by year-end. 4. [FRED] Core PCE and CPI both trending upward through mid-2026; unemployment ~4.1-4.4%, roughly stable. 5. [claude_news] Next meeting is Sept 15-16, 2026, viewed as the more probable hike venue than December. # Cross-market signals - Kalshi related: Only long-dated 2034-2036 fed-funds-level markets available; no direct Dec-2026 hike quote (gap). - Polymarket: This exact market at 28.5% YES; analogous Sept-2026 25bp-hike market at 31.5% YES (No-change at 67.5%), suggesting market sees comparable/slightly higher hike odds for Sept than Dec. - Sportsbook implied: N/A. # Analyst opinions and speculation - Goldman Sachs (2026-08-17): markets are "too hawkish," implying hike odds are overpriced (thehindubusinessline.com). - Schwab/CNBC: if a hike occurs, more likely in September than December (back-to-back hikes seen as atypical after holds). - Forbes (2026-08-19): minutes suggest Fed "likely hiking unless inflation comes down," a hawkish tilt from within the committee. # Directional lean per outcome - **Yes (hike)**: Supported by persistent above-target inflation, record hawkish dissent, June dot plot (9/18 hike-leaning), rising core PCE/CPI. Opposed by: five consecutive holds, new dovish-leaning Chair Warsh, Goldman's "too hawkish" call, historical base rate near 3-15%, and analyst view Sept is the more likely hike month (reducing Dec-specific odds if Sept already hikes or FOMC avoids consecutive hikes). - **No (hold/other)**: Supported by base rates, Polymarket's 71.5% implied No, cooling of Sept-hike odds by mid-August, and typical FOMC gradualism. Risk: opposing tail — sustained inflation surprise forcing action. # Gaps / unknowns - No direct kalshi_direct YES price captured for this ticker — the Polymarket price (28.5%) is used as best available anchor. - No live CME FedWatch reading specific to December 2026 post-August data. - Unclear whether September 2026 meeting outcome (hike/hold) already known at time of resolution — outcome there would sharply reprice December odds. # Calibration anchors - Polymarket YES price (proxy anchor): 28.5%, 30d range 25.5-38.5%. - Historical conditional base rate for hike after year of holds: ~3.3%; unconditional ~14.4%. - Blended quantitative estimate (code_execution): ~4-7%, likely understating current dissent-driven hawkish risk relative to market pricing (~28%).

1. Both forecasts converge tightly (20% and 24%) near the Polymarket anchor but essentially ignore the brief's own quantitative base-rate model, which puts the estimate at "~4-7%, likely understating current dissent-driven hawkish risk relative to market pricing (~28%)" — neither forecaster explains why they land so much closer to the market anchor than to their own stated base-rate evidence, nor do they reconcile this large gap explicitly. 2. Neither forecast grapples with the critical conditional dependency flagged in the brief: "Unclear whether September 2026 meeting outcome... would sharply reprice December odds." If September hikes, December's probability could collapse toward near-zero (back-to-back hikes atypical) or if September holds again, hawkish pressure could compound into December — this branching scenario is not modeled, only mentioned as a directional consideration. 3. Both forecasts treat the Polymarket 28.5% figure as a stable, high-confidence anchor, but the brief notes it swung from 25.5% to 38.5% over just 23 days on thin volume ($56.4k) — this is a noisy, low-liquidity signal that deserves more skepticism/wider uncertainty bands than the tight 20-24% convergence suggests. 4. Neither forecaster addresses the analogous Polymarket Sept-2026 market pricing hike odds at 31.5% (slightly higher than Dec's 28.5%), which is inconsistent with the "Sept is more likely venue" narrative if Sept hasn't resolved yet — this cross-market comparison should either reinforce or undercut the "siphoning" logic, but it's absent from both rationales. 5. The "no-win scenario" framing for Chair Warsh and the "largest hawkish dissent since 1970s" are treated as static descriptors, but neither forecaster considers escalation risk — three dissenting regional presidents could grow to a majority by December if inflation data (core PCE rising steadily, "above 2% target for 5+ years") continues to surprise upward, a tail scenario understated in both. 6. Both forecasts assign only modest weight (~confidence 0.47-0.56) yet still converge to nearly identical point estimates, suggesting anchoring on each other's likely reasoning or the same Polymarket number rather than independently stress-testing the wide range of quantitative estimates in the brief (3.3% to 28.5%).

20% (52% confidence)

Yes: 20% No: 80%

The only usable anchor is the identical Polymarket contract at 28.5% YES, but it is thin ($56k volume), volatile (25.5-38.5% over 23 days), and trending down -9pts over 30 days, so it warrants shading rather than literal adoption. The brief's own conditional base rate (~3.3% for a hike after a year of holds; ~14% unconditional) pulls sharply lower, and structural factors — five consecutive holds, a cautious Chair Warsh, Goldman's 'markets are too hawkish' call, and the analyst view that September is the more natural hike venue — all argue December-specific action is less likely than the market implies. Against that, the genuine hawkish escalation risk is real: a 9-3 July vote with three regional-president dissents, a 9/18 dot plot, rising core PCE/CPI, and minutes signaling hikes 'unless inflation comes down' mean this is not a normal quiet-hold regime, so I do not collapse toward the 4-7% quantitative estimate. The unresolved September branch cuts both ways (a Sept hike makes back-to-back December action atypical; a Sept hold could compound pressure), which keeps uncertainty wide but roughly symmetric around a value modestly below the market. I settle at 20% YES — below the noisy Polymarket anchor but well above the pure base rate.

Total pipeline time: 223.3s