Possible scenario
Iran becomes a full party to the Saudi Arabia–Türkiye–Pakistan mutual-defense pact
1%
−1.6%
Scenario description
Assume Iran is formally admitted to the Mecca Alliance, or Iran signs an accession, protocol, or equivalent instrument making it a full party to the Saudi Arabia–Türkiye–Pakistan mutual-defense pact. The initiating event is an official announcement or signed document by Iran and the alliance members confirming full membership or full-party status. Reported pact features include mutual-defense treatment of attacks on members, logistical support for weapons, ammunition and equipment, a 10-year term, unanimous approval for new members, and intelligence sharing limited to the three current member states; Iran-specific force commitments, financing terms, sanctions treatment, implementation dates, exemptions and operational limits remain unavailable and should not be assumed.
Initial shock
- Geopolitical & conflict risksharp rise
- Defense procurement demand+5% demand
- Oil price+4%
Secondary impacts
- Broad equity market-1.5%
The bigger picture
- For diversified portfolios, this is a broad but modest drawdown: US equities fall 1.5%, reducing covered equity value by about $1.44 trillion.
- Technology falls 2.1% and loses $754 billion, making it the largest drag because high market sensitivity compounds the sector’s enormous size.
- Industrials decline only 0.8% overall, as defense gains offset weakness elsewhere; healthcare and telecommunications also prove relatively defensive.
- The largest dollar loss does not identify the purest exposure: technology dominates by size, while defense manufacturers capture the clearest direct benefit.
Scenario-implied market response
- Market-cap-weighted response
- -1.5%
- Equity value change
- -$1.4T
Most impacted companies
- NVDANVIDIA Corp.-3.1%
- AAPLApple, Inc.-2.1%
- GOOGLAlphabet, Inc.-1.7%
- AVGOBroadcom Inc.-2.9%
- AMZNAmazon.com, Inc.-1.7%
Each figure is the modeled move of the S&P 500 if the outcome occurs. For information only. Not investment advice.
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