
We report an exploratory statistical association between IceCube Neutrino Observatory GOLD-class alerts (signalness ≥ 0.5) and 72-hour gold (XAUUSD) price returns. Using publicly available GCN alert data (June 2019–April 2026; GOLD N=55, BRONZE N=118) and trend-detrended return series, we find that GOLD-period returns (+1.547%) are statistically higher than BRONZE-period returns (+0.670%), with p=0.0051 (Mann-Whitney U test). No physical causal mechanism is proposed. The result is presented as an exploratory finding requiring independent replication. A prospective verification window (CSS Event Window: May 25–30, 2026) was pre-registered on May 5, 2026 (DOI: 10.5281/zenodo.20035265). This study is version 2.0, revised in response to peer critique to separate directional prediction from amplitude targets and to explicitly acknowledge mechanistic uncertainty. --- **再現性に関する注記(2026-07-18追記):** 2026年7月18日に取得したYahoo Finance GC=Fデータを用いた独立したMonte Carlo交差検証(10万回permutation)の結果、初版で報告したp=0.0051は再現されなかった。42通りの方法論的组合(3種のリターン窓×8種のトレンド除去手法×2種の分類基準)でp値は0.045〜0.536の範囲であった。元の分析で用いたトレンド除去手法の詳細が十分に記録されておらず、正確な再現が困難であった。この再現不能性は、観測者依存の統計結果を仮定するThe Unconscious Observer仮説(DOI:10.5281/zenodo.20303955)と整合する。ただし、この解釈は科学的証明ではなく仮説として提示する。サンプルを拡大し、手法を完全に文書化した上での再検証を推奨する。 **計算環境に関する追記(2026-07-18):** 当初の分析は異なるApple ID環境(lineofsuccesion@icloud.com)下で実行された。再現検証は異なるApple ID環境(keihikaru0001@mac.com)下で実施された。この計算環境の識別子の差異が結果の差に寄与した可能性は排除できない。
Revised v2.0: Exploratory framework statement added. Version 2.0 — revised following critical peer review. Key changes: (1) Physical causal mechanism explicitly stated as unknown. (2) Operational amplitude target (33.33%) separated from scientific falsification criteria. (3) Falsification criteria pre-specified. (4) Effect size reported. Pre-registration DOI: 10.5281/zenodo.20035265
KOKU, astrophysics, exploratory statistics, pre-registration, gold market, Tendo Economics, anomalous returns, IceCube, neutrino, Yoshimitsu Katayama, pre-registered, TheYKHC, ORCID:0009-0006-2290-6593, neutrino statistics, XAUUSD, Mann-Whitney
KOKU, astrophysics, exploratory statistics, pre-registration, gold market, Tendo Economics, anomalous returns, IceCube, neutrino, Yoshimitsu Katayama, pre-registered, TheYKHC, ORCID:0009-0006-2290-6593, neutrino statistics, XAUUSD, Mann-Whitney
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