Prof G Markets $1T Moved on Iran “Talks” — Did They Even Happen?
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Mar 24, 2026 
Justin Wolfers, a University of Michigan economist, joins Alex Heath, a tech reporter covering Silicon Valley and AI. They dig into the market rally on disputed Iran talks, war-driven volatility, and why political headlines can scramble investor thinking. Then the focus shifts to OpenAI’s enterprise pivot, its coding stumble, ad ambitions, and unusual fundraising signals.
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Trump Credibility Became A Trillion Dollar Market Variable
- Markets briefly priced Trump’s claimed Iran talks as real, showing how one disputed statement can revalue enormous amounts of household wealth.
- Justin Wolfers says a 1% S&P move equals about $600 billion, so credibility questions alone swung roughly $10,000 per U.S. household.
Volatility Looks Rational When Policy Signals Mean Nothing
- Wild market swings can be rational when investors face huge economic consequences but cannot estimate whether Trump will escalate or back down.
- Wolfers says this is uncharted because presidential statements no longer clarify intentions, breaking the usual feedback loop markets use to discipline policy.
Orders Of Magnitude Matter More Than Precise Forecasts
- Wolfers argues the key macro skill is tracking orders of magnitude, because war headlines can sound huge while missing the real scale of market risk.
- He contrasts the Pentagon’s $11 billion first-week war cost with a trillion-dollar equity move, implying stakes are thousands or tens of thousands per household.