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.

Source: [MarketWatch](https://www.marketwatch.com/story/wall-street-is-betting-trump-backs-down-on-iran-but-what-if-the-taco-trade-fails-this-time-53845c77?mod=mw_rss_topstories)

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