U.S. memory chip giant Micron Technology (Micron) announced fourth-quarter results that exceeded market expectations, driven by strong demand for high-bandwidth memory (HBM) chips from AI infrastructure and global supply shortages. Over the past year, Micron's stock price has surged by over 500%. Micron is the only U.S. manufacturer of high-bandwidth memory (HBM) chips, which are essential for advanced graphics processors and central processors from chip giants like NVIDIA and AMD to handle AI workloads.