Shares of Micron Technology (MU) fell 6.13% to close at $857.71 on October 22, 2026, driven by investor anxiety regarding high artificial intelligence capital expenditures and broader macroeconomic pressures. The decline was fueled by concerns that leading technology companies are investing heavily in AI without delivering proportional sales and earnings returns, creating a skeptical sentiment that spilled over into the semiconductor sector. This negative sentiment directly impacted Micron as a leading memory and storage provider for AI data centers. Investors worry that major tech companies might curtail or overextend their AI spending, which could lead to a demand slowdown affecting Micron's revenue. The pressure was compounded by comments from Nvidia CEO Jensen Huang regarding capital scarcity in the AI cloud market, weighing heavily on investor confidence given Micron's reliance on these industry leaders for continuous hardware investments. The sell-off was further exacerbated by a difficult macroeconomic environment characterized by rising interest rates and inflation. The Federal Reserve recently raised rates and signaled potential future hikes, increasing borrowing costs for technology companies like Micron. Additionally, rising oil prices driven by geopolitical tensions added to inflationary pressures, amplifying the broader market sell-off and pulling Micron down alongside other AI stocks.