What Happened?
Shares of manufacturing equipment and systems provider Advanced Energy (NASDAQ: AEIS) jumped 6.5% in the morning session after the stock moved in sympathy with other semiconductor companies as peer Marvell Technology was set to join the S&P 500 index.
Marvell's shares climbed in premarket trading on the news. This positive development helped lift sentiment across the chip sector, which had experienced a slump during the previous trading session. That selloff was partly triggered by weaker-than-expected AI chip guidance from Broadcom.
After the initial pop, the shares cooled down to $308.42, up 4.2% from the previous close.
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What Is The Market Telling Us
Advanced Energy’s shares are very volatile and have had 27 moves greater than 5% over the last year. In that context, today’s move indicates the market considers this news meaningful but not something that would fundamentally change its perception of the business.
The previous big move we wrote about was 20 days ago when the stock dropped 2.3% on the news that Kye-hyun, a former head of Samsung's semiconductor business, cast a shadow over the long-term outlook for memory chips, predicting that the current AI-driven "super cycle" could lose momentum by 2028, with aggressive expansion by Chinese chipmakers threatening to create a supply glut.
Seagate fell 2.9% and Western Digital fell 2.6% on the warning, with broader semis like Micron also softening. The macro layer made it worse. Memory and component makers trade like long-duration growth assets, most of their value is in future AI-data-center demand. When 30-year yields rip, as observed during the day, the discount rate applied to those future cash flows mechanically increases, and price-to-earnings multiples compress.
Advanced Energy is up 38.9% since the beginning of the year, but at $308.42 per share, it is still trading 20.7% below its 52-week high of $389.05 from April 2026. Investors who bought $1,000 worth of Advanced Energy’s shares 5 years ago would now be looking at an investment worth $2,993.
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