Direxion Daily MU Bull 2X Shares (MUU) surged 18.94% in pre-market trading on Tuesday. The leveraged exchange-traded fund, which aims to deliver twice the daily performance of its underlying asset Micron Technology, reflected a powerful wave of bullish sentiment for the memory chip sector.

The rally was fueled by a series of significant analyst price target upgrades for Micron Technology. UBS raised its 12-month target to $1,625, the highest on Wall Street, citing the transformative impact of long-term supply agreements (LTAs) with hyperscale customers that reduce profit volatility and justify a higher valuation multiple. Other firms, including HSBC and Melius Research, also issued substantial target increases, driven by Micron's exceptional recent earnings and the structural supply-demand gap in the memory industry.

Broader market optimism, stemming from reports of progress in U.S.-Iran peace negotiations, contributed to positive sentiment across the semiconductor sector. The core driver, however, remains the insatiable demand for AI infrastructure, which is creating a multi-year shortage for critical memory chips like High Bandwidth Memory (HBM). Analysts note that supply constraints are expected to persist well beyond 2026, with Micron's management indicating it can currently satisfy only a portion of core customer demand.