Friday saw another key move in the overseas storage sector—Micron Technology’s board member made a significant buy-in, totaling $7.82 million. According to documents filed with securities regulators, a director who recently joined Micron purchased a total of 23,200 shares over three transactions within just two days, at an average price of around $337 per share. Interestingly, this is the only insider buy-in at Micron in the past year; others have mainly been selling. During this super cycle in storage chips, many investors are indeed holding onto their positions.

Micron is a heavyweight player in the global semiconductor industry, primarily designing and manufacturing DRAM, NAND, and NOR chips. The timing is crucial—this director only joined Micron in March of this year, and this buy-in is his first major move as an insider. What’s the background? Micron’s stock price is at a historic high, with an increase of over 250% since 2025, and market expectations for the storage chip super cycle are very hot.

Who is this person? It’s worth highlighting. Liu Deyin, born in 1954, holds a bachelor’s degree in Electrical Engineering from National Taiwan University and a Ph.D. from UC Berkeley. His career is legendary—he has worked at Intel, AT&T Bell Labs, and TSMC, each step at top global tech companies. He spent 31 years at TSMC, rising from grassroots management to chairman, officially taking on the chairman role from 2018 to 2024. In short, he is one of the key figures driving TSMC to become the world’s leading semiconductor foundry.

How significant are his achievements? Starting in 2000, he was responsible for building TSMC’s 12-inch wafer fabs. During that period, the global transition from 8-inch to 12-inch wafers was a critical window, and Liu Deyin led the establishment of TSMC’s first 12-inch fab, expanding capacity to 400,000 wafers per month. This laid the foundation for later advanced process capacity. In 2012, he was promoted to co-CEO, overseeing the advanced process foundry division, including 5nm and 3nm technologies, pushing TSMC to mass produce 7nm and 5nm chips, becoming the first company to offer 7nm process foundry services.

In 2018, TSMC’s founder Morris Chang retired, and Liu took over as chairman. Under his leadership, TSMC achieved 3nm process mass production, initiated 2nm R&D, and solidified its leadership in advanced process manufacturing. This is not just an ordinary executive; he is a giant in the industry with significant contributions to the global semiconductor industry and a deep understanding of chip cycles. The U.S. Semiconductor Industry Association awarded him the “Robert Noyce Award” in 2025, the industry’s highest honor, praising him for “redefining the modern semiconductor ecosystem and revolutionizing chip manufacturing technology.”

This is why Liu Deyin’s substantial buy-in with his own funds is highly significant. As a tech veteran with a background at TSMC, his understanding of AI, GPU, and HBM far exceeds that of ordinary investors. His insider perspective is different—he sees long-term opportunities in the storage industry, especially in this super cycle.

His choice also reflects a resonance within the industry. The development directions of domestic storage companies like Changxin Memory and Changsheng Memory are aligned with this overseas trend. The long-term trend in the storage sector has already formed, making this a key area to watch. Market liquidity and sentiment indeed drive the short-term rhythm, but the industry fundamentals are there, and the overall direction is correct.