Why Is Micron (MU) Stock Up Today? All-Time Highs and the MATCH Act Push Spark 8.5% Rally

Micron Technology (MU) shares surged on April 23, 2026, closing up 8.48% at a record-breaking $487.48. The semiconductor giant has officially set a new all-time high, driven by a "perfect storm" of secular AI demand, a massive guidance hike, and a strategic legislative push in Washington to curb Chinese competition.