Why the US Might Double Down in Iran

Summary

The correlation between S&P 500 stocks and US Treasury returns is at its highest in over two decades, meaning bonds are no longer a reliable hedge against stock market declines. This volatility surge is largely driven by the significant impact of oil price swings on global inflation and growth expectations, essentially making everyone an oil trader. Investors must correctly predict the direction of oil prices, which hinges on the US-Iran conflict's outcome. Influential foreign policy thinkers and Republican leaders believe a US defeat in Iran would severely diminish American global standing, potentially more than Vietnam or Afghanistan. This perception of weakness is a major concern for President Trump, who is highly sensitive to appearing defeated. Drawing a parallel to Lyndon Johnson's decision to escalate in Vietnam despite knowing it was a 'damn mess,' the argument is that the perceived domestic political cost of retreat becomes too high. For Trump, failing to achieve a victory in Iran could be historically damaging, suggesting he is more likely to double down than concede. Unlike past interventions requiring nation-building, a US objective in Iran could be to weaken the regime's regional power projection without full occupation, potentially requiring limited ground involvement. Market volatility continues as investors grapple with whether Trump seeks an exit or is delaying escalation, keeping war risk premiums likely underestimated until conflict resumes.