The relief rally in semiconductors did not survive a full session.
Marvell opened higher this morning and traded as high as $302. By midday it is back around $250, down roughly 13% on the day and erasing a swing of more than 17% from its intraday high. The stock that led Friday's wreckage and Monday's bounce just gave the bounce back.
It is not alone. The Nasdaq 100 is down around 3% intraday and the broad S&P 500 is off about 1.5%. The Philadelphia Semiconductor Index is sliding again after Friday's 10% plunge, its worst single day since March 2020. Monday's recovery, the one that had traders calling a bottom, is gone.
The Names That Led Are the Names That Are Breaking
There is a tight cluster of stocks behind both the 2026 run and this selloff. Some strategists have started calling it the Parabolic 7: SanDisk, Marvell, Micron, Intel, Dell, AMD, and Broadcom. These are not the Magnificent 7 megacaps. They are the chip and hardware names levered most directly to the AI buildout, and through the first half of the year they outran almost everything else.
Today they are falling together. Micron is down about 8% and back near $870 after trading close to $990 this morning. Broadcom is off around 5%. AMD is down roughly 9%, and Dell is lower by a similar amount. Nvidia, the largest stock in the market, is down about 3.5%, a smaller move that still wipes out billions in value at its size.
When the same seven names rise together and fall together, that is concentration. It means a lot of money is expressing one view through one trade. Concentration cuts both ways. It powers the index on the way up and it accelerates the damage on the way down.
How Far Above Trend These Stocks Still Sit
The reason a 13% day in Marvell does not repair the picture is how much ground these stocks covered first.
Marvell trades near $250 today. Its 50-day average price is around $169 and its 200-day average is near $105. Even after this drop, the stock sits more than double its longer trend line, and its 52-week low was $61. Micron tells the same story. It is still near $870 against a 200-day average around $365. A stock can fall hard and remain expensive at the same time.
Valuation backs that up. Marvell trades at roughly 86 times trailing earnings and about 25 times sales. Broadcom carries a price to earnings ratio near 60 and a price to sales ratio above 23. These are growth multiples that assume AI orders keep climbing without interruption. The market is now testing that assumption.
Micron is the interesting exception. It trades at about 40 times trailing earnings, but its forward growth estimates put its PEG ratio below 1, which is cheap if the memory cycle holds. That gap between Micron and Marvell is the whole debate in one comparison: how much of the AI hardware trade is durable earnings and how much is momentum.
What Actually Cracked the Trade
The trigger came a week ago from Broadcom. The company guided next-quarter AI chip sales to about $16 billion against analyst hopes near $17.2 billion, and it reaffirmed, rather than raised, its long-term AI revenue target. For a group priced on the idea that AI demand only accelerates, a single flat outlook was enough to start the unwind.
Then the macro piled on. A strong jobs report pushed rate-cut hopes off the table and revived talk of a hike. Higher-for-longer rates hit the most expensive, longest-duration stocks first, and that is exactly what these hardware names are.
The bounce on Monday looked like dip buyers stepping in. The reversal today suggests it was a technical bounce inside a larger reset, not the start of a new leg higher.
What to Watch From Here
The next real catalyst is tomorrow morning. May CPI lands at 8:30 AM Eastern, with consensus near 4.2% on the headline rate, which would be the hottest reading since 2023. Core is expected around 2.9%. A hot print hardens the case that the Fed has no room to cut at its June 16-17 meeting, and rate-sensitive growth stocks are the first to feel that.
Two things will tell you whether this is a correction or something deeper. First, whether the chip names hold their 200-day average lines or slice through them. For Marvell that is near $105, a long way down from here. Second, whether the selling stays inside the seven hardware names or spreads to the broader index. So far the megacap software and the rest of the S&P are down far less than the chips, which means this is still a leadership problem, not a market-wide break.
Concentration built this rally. The next two sessions will show whether it is now taking it apart.
