US launches ninth night of strikes on Iran targeting military assets; ceasefire collapses as casualties mount
Measured from 20 Jul 2026 (event start), not the 20 Jul 2026 announcement
Defense contractors moved +11.4%, 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
The United States conducted its ninth consecutive night of airstrikes against Iran on July 20, targeting military installations in northwestern Tabriz and other locations, explicitly aimed at degrading Iranian capabilities to attack commercial shipping in the Strait of Hormuz. A preliminary ceasefire agreement collapsed as the conflict entered an escalation trap, with the US responding to the deaths of at least three American service members killed in Iraqi and Jordanian bases. Iran retaliated with missile and drone strikes against Kuwait, Bahrain, and Jordan, widening the conflict beyond the US-Iran bilateral axis. The strikes target Iranian Revolutionary Guard assets and weapons systems used for maritime attacks. This represents an open escalation from the earlier phase of the conflict, with no diplomatic off-ramp evident and both sides signaling intent to continue operations.
Direct hit on global energy supply chokepoint with Brent already at five-week highs; stagflationary transmission to all commodities and equities; ceasefire collapse removes price floor
Ninth night of strikes on July 20, 2026; escalation began approximately July 12-13, 2026; ongoing with no announced cessation date
Reporting confirms ninth consecutive night of US airstrikes as of July 20, 2026, with three US soldier deaths reported during the escalation cycle that began approximately one week prior.
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 contractors moved most at +11.4% against the market, the direction you would expect from a bombing. 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
- Oil tanker operators52% → 26%2.0x calmer after
- Oil & gas producers27% → 27%volatility roughly unchanged
- Defense contractors31% → 41%1.3x more volatile after
- Gold23% → 21%1.1x calmer after
- Airline stocks38% → 48%1.3x more volatile after
The VIX rose 8.0 percent across the window, a mild move. 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. Defense contractors became the most erratic at 1.32×, and 2 of 5 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 |
|---|---|---|---|
| Oil tanker operators | +6.4% | Day 7 | Still elevated |
| Oil & gas producers | +13.1% | Day 7 | Still elevated |
| Defense contractors | +10.0% | Day 5 | Still elevated |
| Gold | -2.6% | Day -2 | Day -1 |
| Airline stocks | -10.0% | Day 3 | Day 5 |
The reaction peaked around day 4 on average. 2 of 5 sectors reverted inside the window, 3 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.