Quick Read
SK Hynix (SKHY) surged 7% on AI high-bandwidth memory demand while Seagate (STX) climbed 5%, pushing its year-to-date gain to 204%.
The Roundhill Memory ETF (DRAM) jumped 5% while the S&P 500 (SPY) fell 0.4%, confirming a sector rotation into storage, not a broad market rally.
Roughly 80% of hyperscale data center storage sits on hard drives, explaining why HDD names rallied alongside DRAM chips in one afternoon.
Just released. Our analysts combed the entire stock market and named the ten best stocks to buy right now, and Western Digital didn’t make the cut. Enter your email to see the names that beat WDC. The report is free. Enter your email and see if any of your stocks made the cut.
The memory bid that opened in NAND has widened into the rest of the storage complex Friday afternoon, and the tape is showing exactly where the money went. The Roundhill Memory ETF (CBOE:DRAM) is up 5% to $59, while the SPDR S&P 500 ETF Trust (NYSEARCA:SPY) is down 0.4% to $770. That gap flips a soft broad session into a clear sector event.
luchschenF / Shutterstock.com
SK Hynix (NASDAQ:SKHY) stock is rallying 7% to $174.38, providing a clean read on the high-bandwidth memory and DRAM curve tied to AI accelerators. Meanwhile, Seagate Technology Holdings (NASDAQ:STX) stock is climbing 5% to $837.23, a different technology serving a different customer set on a different cost curve.
Western Digital (NASDAQ:WDC) rounds out the listed hard-drive exposure alongside Seagate, and today’s tape doesn’t include a confirmed same-day print for the stock. Even so, storage and memory technologies moving together in one afternoon is a harder signal than two NAND names rising in tandem. WDC stock is up 4% today to $461.02.
Free Report, Just Released
Why Didn’t WDC Make The Top 10 List?
24/7 Wall St has helped investors make money for over two decades, and our top analysts just finished ranking the definitive Top 10 Stocks To Buy Now. Not the ten biggest companies. Not the ten everyone is arguing about. The ten best stocks to buy right now.
And WDC didn’t make the cut!
The report is free, and you can see why we think each stock is a top investment today.
Enter Your Email and See the Ten →
Broad Memory Bid Extends Past NAND
There isn’t a fresh company-specific headline pushing SK Hynix higher today. The most recent preliminary quarterly report from the company showed revenue of KRW 79.32 trillion, up 256.8% year over year (YoY), with operating profit of KRW 60.54 trillion. HBM demand for AI infrastructure keeps delivering pricing power across both DRAM and NAND, which is why the American Depositary Share (ADS) is the market’s default proxy for the high-bandwidth cycle.
Story Continues
Seagate’s fiscal Q4 2026 report landed with revenue of $3.63 billion, up 48.5% YoY, and non-GAAP EPS of $5.71. CEO Dave Mosley pointed to “robust cloud data center demand and disciplined execution”, and Seagate guided fiscal Q1 2027 revenue to $4.1 billion, plus or minus $100 million. That guide underwrites the bid Seagate stock is drawing today.
Two Technologies, One Repricing
SK Hynix sells the HBM and DRAM parts that feed AI accelerators directly. Seagate sells hard drives, the cheaper mass-capacity tier that holds the exabytes AI workloads generate over time. Western Digital rounds out the pure-play HDD peer set after its Sandisk separation, and CEO Irving Tan noted on the recent call that “roughly 80% of data stored” in a hyperscale data center resides on hard drives.
Also, SK Hynix stock is up 22% over the past month, so today’s surge extends existing momentum. Seagate stock, for its part, entered the day off its recent highs, which explains part of the leverage on the intraday move.
What to Watch Next
The memory fund climbing hard while the broad tape softens puts SK Hynix, Seagate, and Western Digital in a leadership seat on an otherwise mixed session, and that reads as a sector event across storage broadly. Seagate stock is up 204% year to date (YTD) and Western Digital stock is up 168% YTD, extending a durable run into September. However, a cycle bid that broadens this fast can narrow just as fast, and none of the three announced anything today that changes their own fundamentals.
Investors sizing their exposure to SK Hynix, Seagate, or Western Digital shares can treat the move as a repricing of the memory cycle across the group (we reverse-engineered what the biggest chip winners looked like early in a free playbook here). Moreover, traders can watch for whether the DRAM memory ETF holds above $58 into next week and whether HDD names sustain the bid through the next round of hyperscaler capex commentary. Position sizing matters more than conviction when a whole complex reprices in one afternoon.
Got $1,000? Before You Buy WDC, Read This
If you have cash sitting in your account right now, give this two minutes. After more than two decades of helping investors beat the market, our top analysts at 24/7 Wall St. put together a definitive report on the Top 10 Stocks To Buy Today. And WDC wasn’t one of them.
They combed the entire market. It’s not 10 ideas, not 10 stocks everyone is talking about, it’s what their research points to as the 10 best stocks to buy right now, and it’s free. Read more here and see which stocks made the list –>>
Contact editorial@247wallst.com for any questions or corrections.