HITBrier 0.433

Web search confirms Chinese military activity in South China Sea during prediction window: April 25 article 'China's Type 055 Fires YJ-20 Hypersonic Missile Near Philippines During Balikatan 2026' shows direct Chinese naval operation announcement on April 25. April 28 'Chinese Action Group Operates Nearby' further confirms ongoing operations. Actual: 1+ announced operations, Required: 1 operation, 1 >= 1 therefore threshold met.

Resolved May 2, 2026

Geopolitical

LONG correct

China will announce at least one military exercise or naval operation in South China Sea within 7 days

NEXUS forecast made 2026-04-25 at 34% probability. Resolved: Hit on 2026-05-02. Brier score 0.433.

Derived from: Taiwan Strait Crisis Bayesian equilibrium shows China in gray zone escalation mode with 53% escalation probability. China PLA intelligence updates show 'elevated operational tempo in South China Sea' and 'averaging 8+ sorties daily through late March'. 25% narrow Fearon bargaining range indicates continued pressure tactics.

Probability: 34%
Timeframe: 7 days
Deadline: May 2150d ago
Made: Apr 25

Regimewartime

Every NEXUS forecast is recorded before its outcome and scored with the Brier score (0 is perfect, 0.25 is a coin flip). Misses stay on the record. .

North Korea will conduct at least one ballistic missile test or nuclear facility activity announcement within 7 days

geopolitical51%MISS

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geopolitical20%MISS

Japan will announce at least one emergency diplomatic initiative or regional security partnership within 14 days as Taiwan Strait escalation probability of 53% and Mars-Saturn Conjunction convergence (April 14) force defensive positioning

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China will announce at least one military exercise or naval operation in South China Sea within 7 days

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