Costliest US natural disaster and the oil price shock
Hurricane Katrina devastated the Gulf Coast, causing $125 billion in damage. The storm shut down over 40% of Gulf crude production, sending WTI past $70/barrel for the first time. The S&P 500 declined roughly 3-4% in the weeks following but recovered to its pre-storm high within two months.
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ALAN INTELLIGENCE · alanglobalintelligence.com
ALAN IntelligenceData as of 2026-08-30
Bars: median S&P 500 forward return. Whiskers: 25th-75th percentile. n = 1 occurrences.
Based on 1 historical occurrences. Last triggered: 2005-08-29.
Past performance is not indicative of future results. This material is for informational and educational purposes only and does not constitute investment advice, an offer to buy or sell any security, or a recommendation. Data from publicly available sources believed to be reliable but not guaranteed. All investments involve risk, including possible loss of principal.
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ALAN GLOBAL INTELLIGENCE · alanglobalintelligence.comSource: S&P 500 daily closes · Generated 2026-08-30
Historical occurrencesshowing 1 of 1
Date
1M return
1Y return
5Y return
2005-08-29
+0.4%
+7.6%
-13.4%
What history says
Editorial commentary written by ALAN analysts. Figures cited below are analyst-authored context — they are not derived from the chart above and may reflect different windows or sources.
Oil spiked to record $70.80/barrel then mean-reverted
WTI jumped nearly $5 in a single session. Gasoline hit a record $3.04/gallon. Both normalized within months.
Economic damage was geographically concentrated, not systemic
Katrina devastated the Gulf Coast but the rest of the economy was largely unaffected.
Natural disasters rarely cause bear markets
Even the costliest natural disaster in US history produced only a single-digit equity drawdown.
For your portfolio
Natural disasters have historically repriced energy and insurance far more than the broad index — Katrina's oil spike mean-reverted within months and the S&P 500 recovered in two. Consider stress-testing concentrated regional real estate, insurance, or energy positions against disaster scenarios instead of adjusting the diversified core.
For information and research only. Not investment advice. ALAN does not place trades or execute orders. Figures come from the sources shown and can lag the market; verify independently before making decisions. Past performance is not predictive of future results.
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ALAN is not a broker-dealer or investment advisor. All data is informational only and does not constitute investment advice. Past performance does not guarantee future results.