SanDisk flipping a 2% intraday loss into a +5.50% surge at the close—only to give back 1.06% after hours—is textbook forced passive buying driven by its MSCI World and ACWI index inclusion rather than a fundamental breakout. While Kioxia and SanDisk committing $31B to capacity signals confidence in long-term NAND demand, chasing an index-rebalance pop usually leaves retail traders holding the bag once institutional mechanical flows clear out.

Meanwhile, the real structural story remains in high-bandwidth memory: spot prices for 36GB HBM3E running at ~$2,100 (4–5x contract rates) highlight an insatiable supply deficit, but established leaders like Micron (MU) and SK Hynix are heavily insulated by multi-year locked contracts. With domestic players like CXMT reporting massive H1 revenue growth (+874%) and advancing HBM3E trial production, the smartest play isn't chasing short-term index spreads—it is holding back until CXMT's commercial yield rates are verified before re-evaluating the memory landscape.