The trading week ending Friday June 26 delivered a sharp reminder of the growing divide between tech and the rest of the market. While the Nasdaq Composite tumbled roughly 4.6%, its steepest weekly decline in months, the Dow Jones Industrial Average managed a 0.6% gain, its third consecutive winning week. The S&P 500 lost about 2.0% over the five sessions, falling each day. Friday's close saw the S&P 500 at 7,354, the Nasdaq around 25,298, and the Dow near 51,876.

The AI reality check

The week's dominant story was a broad sell-off in AI and semiconductor stocks. The PHLX Semiconductor Index led declines, with names from Micron to the mega-cap tech giants under pressure. The trigger wasn't a single catalyst but a gathering storm of concerns around the enormous capital spending on AI infrastructure. Big Tech has piled on hundreds of billions in debt, some estimates peg AI-related borrowing above $500 billion in 2026 alone, to build data centers, and investors are increasingly questioning whether the returns will materialize.

"This has dot-com era written all over it," was a refrain echoing across trading desks, as monetization of AI tools still lags the hype. Meanwhile, OpenAI's potential IPO delay and reports of cooling demand for certain chip types added fuel to the fire.

The rotation story

But beneath the headline tech weakness, a very different story was playing out. The S&P 500 Equal Weight index actually rose about 1.5% for the week, signaling that the sell-off was concentrated in the largest names. Small-caps (Russell 2000) and value stocks held up significantly better, continuing the 2026 "Great Rotation" from mega-cap growth into cyclicals and industrials. Seven of 11 S&P 500 sectors finished higher.

The Russell reconstitution, effective Friday, underscored this shift. Small-cap market-cap thresholds rose, and the reconstitution summary highlighted "larger leaders and stronger small caps" as a defining theme for 2026.

Macro backdrop

Macro data painted a picture of a resilient but inflationary economy. Weekly jobless claims fell to 215,000, below the 225,000 consensus, signaling continued labor market strength. The Fed held rates at 3.50%–3.75% at its June 16–17 meeting under new Chair Kevin Warsh, but sharply raised its inflation projections, headline PCE for 2026 was revised to 3.6% from 2.7%. The statement was stripped of much of its forward guidance, a deliberate move toward data dependency.

Oil prices fell sharply for the week, with WTI crude closing Friday at $70.24, down from $74.82 on Monday, as easing geopolitical tensions around the Strait of Hormuz and demand concerns weighed on the commodity.

Crypto

Crypto didn't escape the risk-off mood. Bitcoin closed the week around $60,000, trading in a $58,000–$60,600 range. Ethereum was lower at roughly $1,577, reflecting the broader weakness across risk assets.

Earnings highlight: Micron

Micron Technology stole the earnings spotlight. Reporting after the close Wednesday, the memory-chip giant posted revenue of $41.46 billion, quadrupling year-over-year, and non-GAAP EPS of $25.11, well above the $20.20 estimate. The stock surged 15–17% in after-hours trading. But the violent 13% sell-off that preceded the report on Tuesday highlighted just how skittish the tech trade has become: even blowout numbers couldn't fully erase the week's losses.

The bottom line

This week felt like a market inflection point. The AI narrative, the dominant driver of returns for the past two years, is facing its first serious test. The question isn't whether AI will be transformative; it's whether the spending and valuation curves will converge smoothly or correct violently.

Heading into a holiday-shortened Fourth of July week, all eyes will be on the monthly jobs report and any Fed commentary. The rotation into industrials, financials, and small-caps offers a healthier market breadth than the narrow, top-heavy leadership of 2024–2025. But breadth is only comforting if it translates into durable gains.