The Direxion Daily MU Bull 2X Shares (MUU), a leveraged exchange-traded fund tracking Micron Technology, soared 15.00% intraday, reflecting strong bullish sentiment towards the underlying memory chip stock.

The surge was primarily driven by Micron Technology's announcement of a major $9.3 billion expansion of its Hiroshima, Japan facility. The project is specifically aimed at producing advanced memory chips, including High Bandwidth Memory (HBM), which is a critical component for powering NVIDIA's AI processors. Shipments from the new facility are expected to begin around summer 2028, with the project receiving substantial government subsidies from Japan.

The move comes amid a period of explosive growth and heightened investor focus on the AI memory chip sector. The broader industry context includes a record-breaking U.S. IPO planned for competitor SK hynix, highlighting strong capital market interest. Analysts note tight supply conditions for DRAM memory and blockbuster earnings from chipmakers, fueling optimism about sustained demand from tech giants building out AI data centers.