Tools chosen: kalshi_direct kalshi_related polymarket_related fred code_execution claude_news

Sub-questions (Fermi decomposition)

Planner reasoning

This is a very long-horizon macro question (2030 annual real GDP growth in a 0.4pp bucket), so the dominant inputs are (a) the current Kalshi price across all buckets in the KXGDPYEAR-30 event, which reveals the market's implied distribution, and (b) a historical base rate for how often US annual real GDP growth lands in 2.6-3.0%, combined with consensus long-run projections (CBO/FOMC ~1.8-2.1%). Cross-venue and news checks add color but the base-rate/distribution math plus the market anchor will drive the estimate.

# Current state The market prices the probability that 2030 real GDP growth (annual, BEA Q4/Q4 or annual-average—series not specified in rules) lands in the 2.6%-3.0% bucket. This is a distant, single-point-in-time resolution (2030 data reported ~early 2031); Kalshi currently prices this bucket at 14% YES, up from 8% a month ago, reflecting the "hot" 2.6-3.0 band as one of several buckets competing for probability mass around consensus trend growth (~2.0-2.2%). # Timeline of key events - 2026-02: CBO releases "Budget and Economic Outlook 2026-2036" — potential GDP growth averages 2.1%/yr 2026-2030, slowing to 1.8%/yr 2031-2036; actual GDP growth seen slowing to ~1.8% by 2027 and staying there (confirmed, CBO/AAF). - 2026-06: FOMC June SEP shows real GDP growth projections of 2.2% (2026), 2.3% (2027), 2.2% (2028), longer-run 2.0% (confirmed, Forbes/TradingKey). - 2026-01: IMF WEO Update projects US 2026 growth of 2.4% (confirmed, IMF). - 2026-04: IMF WEO revises US 2026 growth down to 2.3% (confirmed, EFG). - Last ~9 days (as of research): Kalshi 2.6-3.0% bucket price rose from 8% to 14% (range 8-17%), 7-day +2pts, 30-day +6pts, avg daily volume 2,140 contracts (confirmed, kalshi_direct). # Event Will 2030 US real GDP growth fall in the 2.6%-3.0% range (Kalshi KXGDPYEAR-30-B2.8)? # Outcomes to forecast - Yes (growth in 2.6%-3.0%) - No (growth outside that band) # Kalshi market anchor **Current YES price: 14%** (up from 8% 30 days ago, up 2pts in 7 days). Price range over 9 data points: 8%-17%. Average daily volume: 2,140 contracts — meaningful liquidity, trending upward toward the 15-20% zone suggested by base-rate/mixture models. # Sub-question answers 1. **Bucket-implied distribution** — Only this bucket's data was retrieved directly; other 2030 buckets weren't captured (kalshi_related returned 2036/2035 buckets instead, both ~14% for wider bands like [1.6,2.0] in 2035). No full 2030 distribution available from data provided. 2. **Metric definition** — Rules text is empty/unspecified; likely follows BEA annual (Q4/Q4 or annual-average) real GDP growth per standard Kalshi GDP-year convention, but exact resolution source not confirmed in research. 3. **Historical base rate (1948-2024, N=77)** — 10/77 years (13.0%) fell in [2.6%,3.0%]; post-1985 subsample 17.5%; post-2000 subsample 20.0% (code_execution). 4. **Official projections** — CBO: actual GDP ~1.8% by 2027 onward through 2036, potential GDP 2.1%/yr through 2030 (CBO, AAF). FOMC longer-run median: 2.0% (Forbes/TradingKey). IMF: 2.3-2.4% near-term, converging toward ~2% medium-term. All cluster below the 2.6-3.0% band's midpoint (2.8%). 5. **Recession probability in 2030** — Not directly modeled for 2030; related Kalshi market prices 2027 recession at 26% (down from 51% high). Mixture model assumes ~15% recession-state probability, which if it hits, effectively zeroes out the [2.6,3.0] bucket. 6. **Adjacent markets** — KXGDPYEAR-36-B2.8 (2036, same 2.6-3.0% band) priced at only 5% (down slightly), indicating markets expect the band's probability to decay further out, likely due to expected long-run growth deceleration (CBO's 1.8% post-2031 view). This suggests 2030's 14% may already price in relatively favorable near-term momentum vs. 2036. # Key facts (high-confidence, factual) 1. [kalshi_direct] 2.6-3.0% bucket for 2030: 14% YES, 30-day range 8-17%, volume ~2,140/day. 2. [FRED A191RL1A225NBEA] Recent actual annual real GDP growth: 2024=2.8%, 2023=2.9%, 2022=2.5%, 2019=2.6%, 2018=3.0% — several recent years landed inside or near the band. 3. [CBO] Potential GDP growth averages 2.1%/yr 2026-2030; actual growth seen slowing toward 1.8% by 2027+. 4. [FOMC] Longer-run real GDP growth median: 2.0%. 5. [code_execution] Empirical base rate 1948-2024: 13.0% (77 yrs); post-2000: 20.0%. 6. [code_execution] Mixture model (recession+expansion states) estimates ~19% probability; normal-fit models estimate ~8-15%. # Cross-market signals - Kalshi related: 2036 same-band bucket priced much lower (5%), 2035 different-band bucket (1.6-2.0%) at 14% — suggests market sees near-term (2030) growth more likely to be "moderate-high" than far-future years, consistent with fading fiscal stimulus/AI theories. - Kalshi recession market: 2027 recession priced 26% (down sharply from 51%), implying reduced but nontrivial near-term recession risk that could compress GDP growth away from the 2.6-3.0% band. - Polymarket: No matching GDP markets found. # Analyst opinions and speculation - CBO/AAF: growth decelerates as OBBB fiscal stimulus fades, immigration declines, debt crowds out investment — bearish for hitting 2.6-3.0%. - Fed/World Bank: AI-driven productivity could be an upside tailwind, but effects highly uncertain and not yet reflected in official baselines above ~2.0-2.3%. - Synthesis (code_execution): "combined reasonable forecast range 12%-20%, central estimate ~15%" for this exact bucket — closely matching current Kalshi price of 14%. # Directional lean per outcome - **Yes (2.6-3.0%)**: Supported by recent actual-year hits (2018, 2023, 2024 all in/near band) and post-2000 empirical rate (20%); opposed by CBO/Fed/IMF institutional consensus all projecting trend growth ~1.8-2.3%, meaningfully below band, plus recession-tail risk for 2030. - **No**: Favored by structural forecasts (CBO, FOMC, IMF) all clustering below 2.6%, plus long single-year variance meaning growth could also overshoot above 3.0% or fall into recession — both are "No" outcomes, giving No a broad structural edge. # Gaps / unknowns - Full 2030 bucket distribution (all Kalshi buckets, not just this one) not retrieved — can't confirm total probability mass or arbitrage checks. - Exact resolution metric (annual average vs Q4/Q4, first release vs revised) unconfirmed. - No 2030-specific recession probability estimate; only 2027 proxy (26%) available. - No Polymarket cross-check available. # Calibration anchors - Kalshi current YES price: 14% (anchor). - Historical empirical base rate for this exact band: 13% (full sample), 17.5-20% (recent decades). - Model-based synthesis estimate: ~15% central, range 12-20% — closely aligned with current market price, suggesting market is reasonably well-calibrated with modest room for a small upward adjustment given recent-year hit rate and upward price momentum.

1. Neither forecast interrogates the anomaly that the 2036 same-band bucket trades at only 5% versus 2030's 14%, despite CBO/FOMC/IMF baselines being nearly identical (or slightly lower) for both periods; this ~9pt gap seems too large to be justified purely by "fading fiscal stimulus" and neither forecaster flags it as a possible mispricing/arbitrage signal worth adjusting toward. 2. Both forecasts treat the 14% Kalshi price as essentially self-validating ("closely matching... synthesis") without stress-testing whether the recent 8%→14% run-up (30-day +6pts) reflects real information or thin-market momentum/speculative flow given the "meaningful liquidity" but still modest 2,140 contracts/day volume — a possible overreaction that should be discounted rather than anchored to. 3. Neither forecast explicitly addresses that the No side is a disjunction of two very different scenarios (recession/below-2.6% AND above-3.0% overshoot), and neither attempts to decompose No into these two components to sanity-check whether 86% is well distributed — e.g., if AI-driven productivity upside (mentioned as a Fed/World Bank tailwind) has any nontrivial chance of pushing growth above 3.0%, that tail is unquantified in both rationales. 4. Both forecasts settle within 140-150bp of the anchor and describe this as "not pushing much below/above the market," but given the CBO's explicit projection of ~1.8% actual growth for 2027+ (well below band) and FOMC longer-run 2.0%, a stronger case for leaning below 14% (toward the 8-12% normal-fit estimates) is somewhat underexplored — both anchor-hug without seriously testing the low end of the calibration range. 5. Neither addresses metric-definition risk (Q4/Q4 vs. annual-average, which measure it resolves on) as a source of variance that could shift the true probability mass outside the assumed base rates; the brief flags this as unconfirmed, yet both forecasts mention it only in passing without adjusting for the added uncertainty it introduces. 6. The 2027 recession probability (26%, down from 51%) is used as a rough proxy for 2030 recession risk, but neither forecaster considers that recession risk could actually be higher by 2030 given a full CBO-projected deceleration cycle (1.8% trend by 2027+), potentially compounding late-cycle recession risk beyond what a 2027-specific market suggests.

13% (58% confidence)

Yes: 13% No: 87%

Both forecasters converge near the 14% Kalshi anchor, consistent with the 13% full-sample and 17.5-20% recent-decade base rates and a ~15% model synthesis. However, the critique's points have some force: institutional baselines (CBO ~1.8-2.1%, FOMC longer-run 2.0%, IMF ~2.0-2.3%) all sit well below the 2.8% band midpoint, a simple normal fit centered near 2.0% with sd ~1.7 gives only ~8-9% for a 0.4pp-wide band at 2.8%, and the far-dated 2036 same-band contract at 5% suggests the 2030 price embeds optimistic near-term momentum (and a thin-market 8%→14% run-up that may be partly speculative flow). Offsetting that, several recent actual years (2018, 2023, 2024) landed in or adjacent to the band, and unresolved metric definition (Q4/Q4 vs annual-average) plus AI-productivity upside add dispersion that modestly helps a mid-upper bucket. Net, I settle just below the anchor at 13% Yes, with No absorbing both the recession/below-trend mass and the >3.0% overshoot tail.

Total pipeline time: 121.1s