The Direxion Daily MU Bull 2X Shares (MUU) surged 5.02% in pre-market trading on Thursday, as the leveraged exchange-traded fund tracking Micron Technology benefited from multiple positive catalysts for the semiconductor sector.

The rally was driven by Bank of America's bullish forecast projecting the High Bandwidth Memory (HBM) market to expand sevenfold to $246 billion by 2030, with the bank raising its price target for Micron Technology to $155. Concurrently, the Korean semiconductor sector staged a strong rebound, with the KOSPI index surging over 5% and key memory chip makers SK Hynix and Samsung Electronics posting substantial gains.

Additional supportive factors included South Korea's stronger-than-expected GDP growth fueled by AI chip exports, Elon Musk confirming Micron's storage chip supply allocation to Tesla, and positive analyst commentary from firms like KeyBanc and Arete maintaining bullish ratings on Micron. As a fund designed to deliver twice the daily return of Micron stock, MUU's 2x leverage characteristic amplified these positive developments, leading to the pronounced pre-market gain.