Micron Technology, Inc. (NASDAQ:MU) a Q3 bottom contributor, Artisan says

Artisan Partners released its third-quarter 2026 investor letter for the Artisan Developing World Fund, covering the quarter ending September 30, 2026, a period the fund describes as marked by heightened Middle Eastern conflict, inflation pressures, and a selloff in long-dated bonds across the US, Japan, and Europe. Within that climate, the MSCI Korea Index fell significantly before rebounding, while Brazil's market rose 8.18%. The fund returned 3.50%, beating the MSCI Emerging Markets Index's -0.37%, extending its cumulative return since June 30, 2015 to 172.0% versus the index's 128.8%.

Micron was not a source of that outperformance. According to the letter, Micron fell during the quarter as investors questioned the sustainability of AI capital spending and worked through the effects of heavy leverage tied to AI investments globally. That explanation places Micron's move inside a broader portfolio debate rather than a single stock story: the same letter credits outsized winners such as NVIDIA, MercadoLibre, Sea, Visa, and CrowdStrike with driving cumulative returns, and describes a strategy of expanding diversification across correlation stocks for stability through volatility. Micron, by that logic, sits on the losing side of the quarter's rotation within AI-related exposure.

The stakes look narrower than the fund's broader thesis. The reasoning reflects one quarter and one fund's positioning, so it may say more about which AI bets this manager favors than about Micron's underlying business. Notably, 184 hedge fund portfolios held Micron at the end of the second quarter versus 154 in the previous quarter, suggesting that not all large holders shared the fund's caution. How Micron's shares trade from here may hinge on whether the AI spending skepticism that weighed on the stock during the quarter persists or fades.