Finance & markets

Wall Street is betting Trump backs down on Iran — but what if the ‘TACO’ trade fails this time?

Policy desk, National Trade News (2026-09-17): Wall Street is betting Trump backs down on Iran — but what if the ‘TACO’ trade fails this time? For six months, investors had a playbook: when Trump threatens… Primary source: original at MarketWatch (marketwatch.com).

September 17, 2026 6:31 PM GMT · MarketWatch

For six months, investors had a playbook: when Trump threatens Iran, buy the dip, because he always backs down. But in September, the playbook stopped working.

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