Micron Rebounds 18% as Samsung's Record Quarter Reignites the Memory Trade

Micron Technology closed at $874.66 on Thursday, up 18.4%, one of the biggest single-day gains among the large-cap names Bellwize covers. The advance swept the whole memory group along with it. The day before, it was falling.

The spark came from a rival’s earnings report. Samsung Electronics posted record second-quarter operating profit and told investors the global memory shortage would deepen in 2027 and persist into 2028, according to its July 30 earnings call and reports from The Register and KED Global. For the industry, that read as a demand signal. If the largest memory maker cannot see supply catching up for two more years, pricing power stays with the sellers.

Two other developments reinforced it. Microsoft’s cloud results, reported earlier in the week, eased worries that big technology buyers might throttle back on artificial-intelligence spending, a fear that had weighed on chip stocks all month. And UBS initiated coverage of SK Hynix with a buy rating and a $204 price target, arguing the market had not fully priced in structurally higher memory profitability as AI demand accelerates. The firm projected DRAM demand growth accelerating to 36% in 2027 from 22% this year. Micron builds the same high-bandwidth memory those forecasts lean on.

A snap-back after a brutal month

The size of Thursday’s move is easier to read against where Micron had been. The stock entered the session down about 24% over the prior 30 days, part of a broad slide in memory shares that ran through most of July. Wednesday’s close of $739 marked the low of that slide. Thursday erased a large piece of it at once.

Volume told a supporting story. Roughly 63 million shares changed hands, about 1.4 times the 20-day average, heavy but not the blow-off spike that marks panic buying. Even after the jump, Micron sits 28% below its 90-day high of $1,213.56, a measure of how violent the swings in this name have been. Over that window the stock has ranged from $321.80 to $1,213.56.

Advanced Micro Devices and Intel rose alongside it, both up double digits on the same session, as the read-through from Samsung’s outlook and the cloud-spending picture lifted the broader chip trade. The move reached beyond the names Bellwize tracks. Memory peers SK Hynix, SanDisk, Western Digital and Seagate each gained double digits on the day.

What the memory makers are signaling

The clearest forward markers now come from the suppliers themselves. Samsung was blunt about it. It said sales of its newest high-bandwidth memory, HBM4, should more than triple quarter over quarter and make up well over 60% of its HBM revenue in the second half, framing that pace as evidence of how tight AI-related supply remains. Customers, it added, are pushing for multiyear contracts to lock in chips.

For Micron, the next real test is its own results. Those numbers will show whether the pricing strength Samsung described is reaching Micron’s memory book, and whether the selloff that dragged the group down through July has left a mark. The catalysts that moved the stock on Thursday belong to other companies. Its own report is the one that answers for it.

This is a general-market summary for information only — not investment advice, and not a recommendation regarding any security.