Micron (NASDAQ:MU) has been one of the standout performers in the semiconductor sector over the past year, delivering exceptional gains for shareholders. However, like many of the AI-driven chip stocks that surged during the rally, the shares have come under heavy selling pressure, falling ~30% since the company's blockbuster earnings report on June 25.

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The decline has intensified this week despite a largely supportive industry backdrop. Semiconductor equipment leader ASML Holding raised its outlook earlier in the week, while Taiwan Semiconductor delivered better-than-expected results and increased its guidance, with both companies reinforcing the strength of AI-related demand.

Even so, a wave of profit-taking and several negative headlines have dented investor confidence.

According to CNBC, concerns include a proposed moratorium on data-center construction in New York State and reports that CoreWeave has explored hedging against potential future declines in memory prices. Both developments have added to the cautious sentiment surrounding AI infrastructure investments.

Investor Ragmar Rikberg, however, views these developments as "normal headwinds" rather than signs of a fundamental shift. He believes concerns over excessive AI spending and slower-than-expected monetization have been recurring themes for some time, while sharp gains across the sector have naturally encouraged investors to lock in profits.

"To me," added the investor, "staying the course during periods of high volatility with long‑term positions means digging into the details to see whether the numbers still support the narrative. In Micron's case—and for the memory sector more broadly—I don't see the narrative turning negative; if anything, based on fresh commentary from ASML and TSMC, it looks even more supportive."

That said, if that all sounds like the words of an MU bull, that's not quite the case, as Rikberg has just downgraded his MU rating from Buy to Hold. (To watch Rikberg's track record, click here)

While he believes the stock remains attractively valued, trading at roughly 5.5 times projected 2028 earnings, he argues that uncertainty surrounding future memory pricing limits his conviction.

Rikberg contends that the sector's recent earnings growth has been fueled primarily by substantial price increases rather than volume alone, a dynamic affecting the entire memory industry rather than Micron specifically. He notes that major AI hardware suppliers, led by Nvidia, have benefited from an environment where gross margins above 80% have become commonplace, well above the semiconductor industry's historical 30% to 60% range. Although those margins remain supported by a significant supply-demand imbalance, he believes that imbalance will eventually normalize. Unlike Nvidia, whose technological leadership and CUDA ecosystem provide a durable competitive advantage, memory manufacturers compete with "several similarly capable" rivals and are therefore more vulnerable to future pricing pressure.

"Whether more balanced pricing discussions in the memory market begin in 2028, 2030, or 2033, nobody knows—but at some point they inevitably will. And that's a major uncertainty with no clear answers," Rikberg summed up.

Rikberg's cautious stance remains a minority view on Wall Street. While one analyst stays on the sidelines, all 29 other recent reviews are positive, making the consensus view a Strong Buy. At $1,569.29, the average price target offers 12-month upside of 84%. (See MU stock forecast)