Micron (MU) is trading at $331.54 (+3.03%) after the company announced it has started mass production of its HBM4 memory for Nvidia's upcoming Vera Rubin AI platform.
- The company also reported that its entire HBM4 production capacity for the 2026 calendar year is already fully committed under binding contracts, signaling strong and visible demand for its next-generation products.
- This news provides investors a clearer long-term outlook on Micron's competitive positioning in the high-bandwidth memory market for AI, where it competes with rivals like Samsung and SK Hynix.
- The stock is rallying on this company-specific catalyst in addition to a broader market recovery driven by positive macroeconomic signals.