Broadcom shares fall after report says SK Hynix is slowing HBM expansion

Broadcom’s shares (NASDAQ: AVGO) moved lower on June 23 after a market report raised concerns about the pace of high-bandwidth memory, or HBM, buildout. In the afternoon session, the stock was down about 2.9%, according to the Yahoo Finance report, which pointed to a development at SK Hynix.

HBM is a specialized type of memory designed to move large amounts of data at high speed, making it a critical ingredient for modern AI accelerators. The report said SK Hynix is slowing its expansion of HBM capacity, a change that investors interpreted as potentially cooling demand expectations across parts of the AI-chip supply chain.

Broadcom is a fabless chip and software company, meaning it designs products while relying on manufacturing partners rather than building its own semiconductor fabs. Its exposure to the AI buildout is generally tied to the custom silicon and networking ecosystem that supports data-center computing, along with broader demand for systems that integrate accelerators and fast memory.

The selloff reflects a common market mechanism during the AI cycle: when memory supply plans are adjusted, investors often reprice the near-term outlook for accelerator shipments and the downstream components that depend on them. Even if the end-market demand remains intact, slower memory capacity growth can shift timing, pricing, or the perceived urgency of new system deployments.

While the report focused on SK Hynix’s HBM expansion plans, the market reaction landed on Broadcom’s stock. That suggests traders were linking memory constraints or delays to expectations for AI infrastructure spending where Broadcom’s chips and interconnect technologies have a role.

Broadcom’s business is closely watched in periods when data-center spending indicates shift. In AI infrastructure, memory and compute upgrades tend to progress together, and supply-chain news can influence how quickly customers are expected to ramp new servers, accelerators, and networking configurations.

Still, the Yahoo Finance post did not provide details on how the HBM timing would translate into specific Broadcom revenue lines, guidance, or customer orders. It also did not quantify the extent of SK Hynix’s slowdown or indicate whether the change was temporary, demand-driven, or production-logistics driven.

Going forward, investors are likely to watch for follow-through from suppliers and from Broadcom on demand visibility. The next key indicates would be any clarification of HBM capacity plans and whether Broadcom management addresses AI-related customer momentum or the timing of deployments in future updates.