Shares of Micron Technology (MU) surged 5.41% in pre-market trading on Friday, extending a powerful rebound that saw the memory chip maker snap a four-day losing streak in the prior session. The stock was buoyed by a confluence of positive catalysts that reignited investor confidence in the memory chip sector.

A key trigger was Microsoft's strong fiscal fourth-quarter results and its commitment to maintain capital expenditure guidance, which eased fears of unsustainable overspending on artificial intelligence. The software giant's "responsible" approach to AI investments helped soothe concerns that had weighed heavily on chip stocks. Meanwhile, Samsung Electronics posted blockbuster earnings with a 1,814% surge in operating profit and projected that AI-driven memory shortages will persist through 2028, signaling a prolonged period of tight supply and favorable pricing for memory makers like Micron.

An additional policy boost came from bipartisan U.S. senators moving to block Apple's plan to procure memory chips from Chinese manufacturers. The intervention effectively safeguards Micron's revenue stream, as Apple accounts for a significant portion of its annual sales. The broader semiconductor sector also rebounded sharply after a period of heavy selling, with bargain hunting and deleveraging among investors contributing to the upside momentum.