Overview
- Sandisk and Micron led the S&P 500's first‑half rally with extraordinary returns, with Sandisk up about 860% and Micron up roughly 304% by the end of the period.
- Micron reported a blowout quarter and disclosed large multi‑year customer agreements and deposits that company executives say reflect continued tightness in high‑bandwidth memory and high‑performance NAND.
- The core demand driver is rapid AI build‑out in data centers and cloud services, which has pushed up need for HBM and fast NAND and kept prices elevated because new fabs take years and large investment to come online.
- Market forces amplified the move: analyst upgrades, raised price targets, heavy ETF weightings and big take‑or‑pay commitments from hyperscalers have concentrated buying and helped lift stock prices.
- Key risks that could reverse gains include very high valuations, planned competitor capacity additions in the next industry cycle, and shifts in enterprise AI spending; investors should watch upcoming earnings, NAND and HBM price trends, and signs of new fab capacity.