Qualcomm and Micron helped add about $400 billion to chip stocks in a single day, according to Reuters. The move came after both companies issued quarterly reports that reassured investors that demand tied to AI hardware is still running hot.
Micron’s earnings reinforced the idea that memory makers are cashing in on the AI build-out, while Qualcomm said it expects a meaningful jump in revenue from server processors and accelerators in the coming years. After an 8% drop in the PHLX index on Tuesday, the bounce looked less like a rally and more like investors admitting they may have been too gloomy.
Micron and Qualcomm reset investor expectations
Micron has become the obvious winner in the current cycle. The company is posting the highest profit margin among US tech companies, and its shares are already up more than 260% since the start of the year, before this week’s jump is even counted. That kind of run usually invites skepticism; for now, the numbers are doing the talking.
Qualcomm’s guidance mattered for a different reason. The company is better known for smartphones, but its push into data-center silicon gives investors another reason to treat it as more than a handset story. In a market obsessed with AI compute, that is a useful narrative shift.
Who benefited from the chip stocks rebound
The ripple effect hit both direct rivals and the infrastructure stack around them. Micron competitors Western Digital, Sandisk, and Seagate Technology rose more than 8%. Arm gained 6% in US trading, while Marvell and Broadcom added 4% and 2%, respectively. Even chip-equipment suppliers got a lift, with Applied Materials and ASML each climbing more than 4%.
- Western Digital, Sandisk and Seagate Technology: up more than 8%
- Arm: up 6%
- Marvell: up 4%
- Broadcom: up 2%
- Applied Materials and ASML: up more than 4%
The AI trade still has plenty of believers
The bigger message is that one bad session does not end the AI rally. Investors have been quick to punish anything that looks stretched, but they remain just as quick to buy back into companies that can credibly claim exposure to AI servers, accelerators, or the tools needed to make them. That is especially true in semiconductors, where demand can cool in one quarter and reheat in the next.
The open question is whether this was a genuine reset or just another burst of optimism chasing a crowded theme. If Micron keeps printing margin numbers like this and Qualcomm turns its data-center ambitions into actual revenue, the chip rally has room to run. If not, investors may find out again that semiconductor euphoria is a fast way to spend $400 billion.