US-Iran Pause Sends S&P 500 Up 1%: What Steve Eisman Is Watching

The market is doing its best impression of a dog that finally caught the car. The Dow is up 593 points (over 1%), the S&P 500 is up 64 points, and the Nasdaq is up 252 points on Monday morning, all because the US and Iran agreed to stop bombing each other for a couple of nights. Oil is tumbling, bond yields are falling, and traders are back in full risk-on mode. Whether this lasts is the question nobody can answer with a straight face.

Here is the tension in a nutshell. Wharton professor Jeremy Siegel is practically bouncing off the walls, arguing that a genuine ceasefire or pause in Middle East tensions could trigger a 10% pop in the S&P 500. He called claims this is the most expensive market in history "ridiculous," pointing to the 1999-2000 period as the real benchmark for insanity. His three worries: geopolitical risk, AI capex sustainability questions, and money supply growing at a 9% annual rate over the last six months. That last one is the sneaky one.

Meanwhile, Steve Eisman of "Big Short" fame has sold his longtime stake in $GOOGL and moved to cash, citing doubts about AI monetization timelines. His core thesis is unsettling: the entire market has essentially become one trade. Even a diversified 60/40 portfolio is not actually diversified when tech and AI dominate both equities and a significant chunk of new bond issuance. If AI delivers, the party continues. If it does not, Eisman expects a significant correction and he is not sticking around to find out which it is. An Asbury Research analyst appearing on Investor's Business Daily's YouTube channel made a similar structural point, calling the current setup an "inflection point" across multiple asset classes simultaneously, which is rarer than it sounds and typically precedes a major directional move in one direction or the other.

The geopolitical backdrop remains genuinely fragile. The US paused strikes on Iran after 13 consecutive nights of attacks, with Bloomberg reporting concerns about depleted Patriot anti-missile interceptor stockpiles as a real factor in that decision. Pakistan and Oman are now acting as mediators. Physical oil prices had spiked with some barrels approaching $110 during peak hostilities, so today's retreat is meaningful but does not erase the supply chain damage already done to Red Sea and Hormuz shipping routes.

The Fed meets Wednesday, and with roughly 40% odds of a rate hike priced in (per Bloomberg Surveillance) driven by the oil-inflation spillover and a 10-year yield that touched 4.72%, Chair Powell is walking into one of the trickier press conferences in recent memory. S&P 500 earnings are running at 34% EPS growth this season (24% excluding Google), and the guidance ratio is at its highest since 2021. The fundamentals are genuinely good. The macro is genuinely complicated. Markets are choosing to focus on the former today, which is fine until it is not.

The most honest read on all of this comes from the Asbury Research analyst: this is not a time to be clever about short-term price targets, it is a time to know that something big is about to break one way or the other. Either the ceasefire holds, the Fed pivots dovish, and Siegel's 10% pop happens before Labor Day, or the ceasefire cracks, oil rips back toward $110, and Eisman looks like the smartest person in the room again. Both outcomes are fully on the table before Wednesday's close.