SanDisk shares climbed 10.84% on Tuesday after the company and SK Hynix unveiled the first industry standard for High Bandwidth Flash memory, a new tier designed specifically for AI chips. Google and Tenstorrent jumped into the consortium during the standardization push, lending serious credibility to what's shaping up as a genuine infrastructure play.
The Open Compute Project published the HBF specification this week, giving chip designers a common playbook for integrating the technology into AI accelerators. What makes this different from existing memory options is straightforward, at least on paper. High Bandwidth Memory runs fast but maxes out around 100GB per chip. Solid-state drives hold massive amounts of data but move it slowly. HBF splits the difference, supporting stacks up to 512GB per die with read speeds hitting 3.0 terabytes per second across three performance tiers.
SanDisk and SK Hynix started this consortium back in February, quietly building the spec while the memory sector got hammered. SanDisk's chief technology officer Alper Ilkbahar called the release an important milestone for the ecosystem. The timing matters because SanDisk reports earnings after market close today, with Wall Street expecting $33 per share on roughly $8.3 billion in revenue, a massive jump from $0.29 a year prior.
Here's the catch. SanDisk shares tumbled nearly 47% last month during a broader memory industry collapse. SK Hynix has been just as volatile since its Nasdaq debut in July. The stock spiked Tuesday on HBF news, but pulled back in Wednesday premarket trading as investors waited for tonight's earnings results. The rebound in memory stocks reflects how tightly Korean and US markets now swing together, with AI infrastructure spending moving in lockstep across both regions. Today's earnings will tell whether the AI memory story behind Tuesday's rally actually holds up under scrutiny.
This material is for informational purposes only and should not be construed as financial advice or investment guidance.
