Micron Technology (NASDAQ: MU) stock surged 9.6% today, following a 25% decline over the past four trading days. HSBC analyst Alastair Pinder suggests the rally is driven by investor excitement over the theory that major AI hyperscalers, including Google, OpenAI, and Anthropic, are significantly increasing spending on AI capacity, which is expected to boost demand for memory chips and benefit companies like Micron.