Why Is Marvell (MRVL) Stock Up Today? $2B Nvidia Investment and AI Infrastructure Pact Spark 12.8% Rally

Marvell Technology (MRVL) closed the session on March 31, 2026, with a massive 12.80% gain, ending at $99.05. The rally marks a definitive turning point for the data infrastructure leader, which had faced some technical pressure earlier in the month despite a strong Q4 earnings beat. Investors flooded back into the stock following the announcement of a strategic AI Factory partnership with Nvidia (NVDA), underpinned by a direct $2 billion cash infusion.