Macro Bias

[ Daily Algo Briefing ]

Tuesday, April 21, 2026

[System Output] Algo Bias

NEUTRAL (-3)

[System Output] Overlay

HIGH ALERT

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BOTTOM LINE: The market carries a neutral score today, but the news picture has shifted materially. Iran conflict is now creating real energy disruptions (IEA calls it the biggest energy crisis in history), and concurrent questions about Trump's temperament are raising political uncertainty. The historical pattern from April 16 no longer applies cleanly because geopolitical shock plus policy doubt breaks the usual playbook. Sit tight until the dust clears.

SECTOR BREAKDOWN

  • Energy: Under Pressure -- Iran war has seized global attention. Refiners are chasing heavy sweet crude, fuel blenders are scrambling, and studies show long-haul flight costs rising by $100 per ticket. Supply chain stress is real and spreading.
  • Airlines: Under Pressure -- Spirit Airlines is in distress, and the broader sector now faces higher fuel costs from Hormuz transit risk. Even talk of government help signals trouble, not support.
  • Healthcare: Strong -- UnitedHealth beat quarterly estimates and lifted profit guidance while managing high medical costs effectively. Insurance pricing power is holding even as macroeconomic noise rises.
  • Discretionary/Consumer: Neutral -- Karex condom maker is raising prices sharply due to Iran war supply constraints. Input cost inflation is creeping into unexpected corners, but demand has not cratered yet.

RISK CHECK The temperament poll and Iran escalation are not routine headline noise. Geopolitical shocks that touch global energy, supply chains, and political confidence typically break historical analogs because they reprrice risk across all assets simultaneously and unpredictably. The April 16 analog worked in a stable policy environment. That assumption no longer holds. Until markets digest what sustained Iran conflict means for oil, shipping, and policy coherence, the historical pattern's predictive value declines sharply.

MODEL NOTES The closest match remains April 16, 2026 at 90% confidence, which printed a +0.57 intraday net and +0.94% range. However, that date preceded the escalation of Iran war headlines and the public doubt on Trump's judgment. The second-ranked analog from May 20, 2025 showed -0.95 intraday net and much wider 1.85% range, but occurred in a different volatility regime. Model Diagnostics: Cluster Average Intraday Net -0.19%, Session Range 0.98%, Match Confidence degraded to unreliable due to shock. The pattern suggests modest downside bias, but geopolitical shocks routinely produce outsized moves that break these averages.

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