Iran-backed Houthis fire on Saudi oil sites; no US strike on Iran for first time in two weeks; Widening war with Iran th
Measured from 26 Jul 2026 (event start), not the 26 Jul 2026 announcement
Defense moved +8.3%, the largest reaction measured, though not statistically significant, meaning it may reflect normal market noise rather than the event itself. This is a provisional result; the full measurement window is not yet complete.
LMT, RTX, NOC · up
What Happened
Yemen's Iran-backed Houthi militants launched confirmed missile and drone attacks on Saudi oil installations at Red Sea ports on July 25-26 in response to Saudi airstrikes on Hodeida. Simultaneously, US military officials disclosed to media that the intensive 13-night bombing campaign against Iran has created concerning depletion of air defense missile stocks, with some officials stating that the strikes are counterproductive and strengthening rather than weakening Iranian political cohesion. The attacks on Saudi infrastructure represent operational maturation of Houthi capabilities, which now include precision strikes on critical energy infrastructure at significant range from Yemen. US military resources are becoming constrained by the intensity of operations, creating pressure to sustain the strike pause or risk inventory depletion.
Confirmed Houthi capability to strike Saudi infrastructure and US constraints on air defense stocks create sustained uncertainty about crude supply and geopolitical escalation ceiling, preventing crude prices from normalizing downward.
Houthi attacks occurred July 25-26, 2026; missile depletion concerns reported around July 25-26 as context for strike pause.
Houthi missile and drone attacks on Saudi oil facilities confirmed for July 25-26. Officials report US air defense missile depletion concerns from 13 nights of intensive strikes. Strike pause confirmed for first time in two weeks on July 25.
Read how dates work →Partial reaction shown. Significance flags are marked provisional and may change as more price data accumulates.
How To Read This
Each sector below is a basket of named stocks. The percentage shown is the move beyond the overall market (S&P 500) , what event studies call the . A move only counts as when it sits clearly outside that basket's normal weekly swings.
How Much Sectors Moved
Path over time. Click a sector in the legend to toggle it. Dashed lines mark key moments.
Defense moved most at +8.3% against the market, the direction you would expect from a cyberattack. None of the moves cleared the significance threshold. Read the direction as flavour, not signal.
Volatility
Volatility measures how erratic prices became, a separate signal from the direction of the move.
Market fear rose modestly
- Gold21% → 18%1.2x calmer after
- Treasuries7% → 14%2.1x more volatile after
- Defense33% → 17%1.9x calmer after
- Broad market12% → 19%1.6x more volatile after
The VIX rose 4.0 percent across the window, essentially flat. Read this as the market's demand for protection, not the direction of any single sector.
A ratio above 1.00 means the sector's daily-price swings widened after the event. Treasuries became the most erratic at 2.06×, and 2 of 4 sectors traded meaningfully wider than they did before. Volatility is a separate signal from direction: a sector can end flat and still have traded wildly along the way.
Phases
| Sector | Peak Move | Peak Day | Reverted By |
|---|---|---|---|
| Gold | +2.7% | Day 2 | Day 4 |
| Treasuries | -5.3% | Day 6 | Still elevated |
| Defense | +10.9% | Day 0 | Still elevated |
| Broad market | +0.1% | Day 4 | Day 5 |
The reaction peaked around day 3 on average. 2 of 4 sectors reverted inside the window, 2 were still elevated at the close. A reaction that reverts is a shock priced in; one that stays is a re-rating.
Historical Precedents
Companies Most Affected
Measured 10 days after the event. Reaction still developing; the full window is not yet complete.
This tool informs your decision. It does not give investment advice.