Intel (INTC) just notched its first record high in 26 years, up 239% this year, and that's not even the biggest move in the sector. Sandisk (SNDK) has surged 558% over the same stretch. Taken together, the global semiconductor industry has added approximately $3.8 trillion in market capitalization over the last six weeks — a melt-up by any honest definition of the word.
The setup here is broader than most traders appreciate. This isn't just the Nvidia (NVDA) trade anymore. The rally has expanded well beyond specialized AI processors to pull in traditional CPUs and memory chips — the unsexy infrastructure layer that everyone ignored for two years. Micron Technology (MU) is the clearest example: projected to generate $77 billion in operating profit this year, a stark reversal from losses in 2023, as demand for memory chips consistently outstrips supply. We flagged Micron's trajectory earlier this week when the stock hit an all-time high — the follow-through since then has been decisive.
What's driving it? Agentic AI models — systems that run continuously, 24 hours a day, seven days a week, without a human in the loop — are consuming compute at a rate that no one modeled correctly two years ago. The world's wealthiest tech firms are in a land grab for capacity, and that urgency is flowing straight into banner profits for chip manufacturers. Jonathan Cofsky, portfolio manager at Janus Henderson, used exactly that phrase: banner profits. He's not wrong.
"The anomaly right now is just how strong earnings growth has been." — Denise Chisholm, Director of Quantitative Market Strategy, Fidelity Investments
Chisholm's read matters because it addresses the valuation question directly. The instinct when a sector adds nearly four trillion dollars in six weeks is to reach for the bubble playbook. But the earnings support here is real and measurable. The PHLX Semiconductor index's six-week performance is the strongest since the dot-com peak — that's the historical anchor that keeps veteran investors uneasy. The difference is that in 1999 and 2000, the earnings weren't there. Today they are. Micron alone flips the narrative.
Still, the memory of boom-bust cycles doesn't fade easily. Steve Sosnick, chief strategist at Interactive Brokers, described the move as "about as vertical a move as I can remember." That's not a sell signal on its own — vertical moves can stay vertical longer than positioning allows for — but it does flag the risk of a sudden air pocket if any single catalyst disappoints. Peter Feinberg, a retired lawyer and long-term investor cited in the Wall Street Journal's reporting, put it more colorfully: the party is best about a half-hour before the police shut it down. The most dangerous words for an investor, he reminded himself, are "it's different this time."
Notable.
That tension — strong fundamentals against vertical price action — is exactly where the positioning debate sits this morning. Trimming into strength feels rational but costs alpha if the melt-up has another leg. Holding full size into a parabolic feels reckless but looks brilliant if capacity shortages persist for years, as some analysts now project. There's no clean answer, which is why the bid in semis tends to come from institutions rotating out of defensive names rather than new money taking fresh risk. Watch the relative performance of memory versus logic chips at the open — if memory holds its bid while logic softens, that's a rotation within the sector, not an exit from it.
On the macro side, the rate backdrop isn't fighting this trade. The federal funds effective rate sits at , per FRED data, and the 10-year Treasury yield is at — elevated but not climbing in a way that pressures growth multiples right now. The as of May 8 signals a curve that's re-steepening, which historically has been friendly to cyclical tech and capital-intensive sectors. That's not a tailwind to shout about, but it's not a headwind either.
The valuation math, at least on one name, is genuinely striking. One chip stock referenced in the Wall Street Journal's sector analysis — despite its surge — trades at just 8.9 times projected earnings, well below the S&P 500 average. That kind of multiple compression during a rally usually means the market still doesn't fully trust the earnings durability. That skepticism is the fuel, not the warning sign. When the skeptics capitulate, that's when the valuation conversation gets dangerous. We're not there yet, but the six-week pace of gains suggests we're moving toward it faster than most people expected.
The broader theme — that AI infrastructure spending is broader and stickier than consensus assumed — runs through everything we've been watching this quarter. Last week's earnings cluster made the same argument from a different angle: the macro bears kept waiting for capex to roll over, and it hasn't. It's accelerating. The semiconductor melt-up is the most visible expression of that acceleration, but it's not isolated. Memory, logic, traditional CPUs — the whole stack is getting bid.
What to watch into the close: persistent supply bottlenecks are the structural floor under this trade. If any manufacturer hints at capacity additions coming faster than expected, that's the catalyst for a short-term offered session — not a trend reversal, but a pause that shakes out the weakest hands. Equally, any signal that agentic AI deployment is hitting friction — regulatory, energy, or otherwise — would test the narrative hard. For now, the setup favors staying long the sector with tighter stops than usual, given how far prices have moved from any sensible mean. The PHLX Semiconductor index hasn't looked like this since the dot-com era. That's either a warning or a once-in-a-generation opportunity. The earnings say opportunity. The price action says be ready to move fast either way.