KEY POINTS
- The S&P 500 closed at a fresh all-time high of 7,519.12 on May 26, gaining 0.61% as the Nasdaq surged 1.19% to 26,656, while the Dow dropped 118 points on rotation out of industrials.
- A 19% surge in Micron Technology shares, which pushed the chipmaker past a $1 trillion market cap, powered the session alongside renewed optimism around a US-Iran ceasefire framework.
- Traders should watch for Wednesday's PCE inflation data and any concrete language from US-Iran negotiators, both of which could determine whether this breakout holds or reverses.
The S&P 500 closed at 7,519.12 on Monday, a fresh all-time high, as semiconductor stocks led a broad technology rally and traders priced in growing odds of a US-Iran peace agreement. The Nasdaq Composite gained 1.19% to 26,656.18, also a record, while the Dow Jones Industrial Average fell 118 points to 50,461.68 as money rotated out of cyclicals and into growth.
The session's message was unambiguous: risk appetite is back, and it is being channeled almost entirely through AI-adjacent chipmakers. The VanEck Semiconductor ETF gained more than 3% and touched a new 52-week high, with On Semiconductor and Western Digital each adding nearly 9%. Advanced Micro Devices rose 6%. But the star of the day was Micron Technology, which surged 19% to cross a $1 trillion market capitalization for the first time in its 47-year history after UBS tripled its price target from $535 to $1,625.
A Divergence Worth Watching
The gap between the Dow and the Nasdaq tells a story that has been building for weeks. The Dow's 0.23% decline reflected selling in rate-sensitive industrials and financials, while the Nasdaq's surge was driven by companies whose earnings trajectories are anchored to AI infrastructure spending, not consumer demand or borrowing costs. The PHLX Semiconductor Index is now up more than 65% year to date, dwarfing every other sector.
This is not just a momentum trade. Bank of America raised its 2026 global semiconductor market forecast to $1.3 trillion, up from $1 trillion just four months ago. The revision reflects actual contract commitments from hyperscalers, not speculative demand modeling. When Meta signs a $100 billion chip deal with AMD and OpenAI locks in gigawatt-scale GPU deployments, the revenue visibility for chipmakers extends well into 2028.
Iran Optimism, With Caveats
The geopolitical backdrop also helped. Over the weekend, reports indicated the US and Iran had reached a framework for extending the ceasefire, with Iran agreeing in principle to reopen the Strait of Hormuz in exchange for the US easing its naval blockade. Oil prices responded with a 5% drop to two-week lows on Monday before Brent settled near $99 per barrel on Tuesday. The prospect of cheaper energy fed directly into equity risk appetite, particularly for growth stocks that benefit from lower discount rates.
But traders who have been in this market since the Iran conflict began in late February know that frameworks and final agreements are very different things. President Trump said Sunday that the US would not rush into a deal and the blockade would remain in full effect until terms are finalized. Iran's foreign minister struck a similarly cautious tone. The Strait of Hormuz, through which roughly one-fifth of global oil flows, has been effectively closed since late February. Even a deal would create a logistical nightmare that could keep energy prices elevated for months, according to shipping analysts quoted by Al Jazeera.
What Comes Next
The S&P 500 has now posted record closes in three of the last five sessions. The index is riding a potent combination of blockbuster earnings, AI capital spending, and tentative geopolitical de-escalation. Q1 blended earnings growth is running at 15.1%, the sixth consecutive quarter of double-digit growth, with 84% of reporting companies beating EPS estimates by an average of 12.3%.
The immediate risk is Wednesday's PCE inflation print. Core PCE ended 2025 at 3%, well above the Fed's 2% target, and the Iran-driven energy shock has only added upward pressure. If the number comes in hot, Treasury yields could spike and force a reassessment of the rate path heading into Kevin Warsh's first FOMC meeting as chair in mid-June. The 10-year yield eased slightly to 4.47% on Tuesday, but traders are pricing an 80% probability of a rate hike by December. This market is climbing a wall of worry. The question is whether the wall is getting taller.
