Why Sandisk Stock Crashed on Monday

SanDisk (SNDK) shares plunged 11.7% Monday after Chinese DRAM chipmaker CXMT launched a $487 billion IPO on the Shanghai Stock Exchange and surged 466% in its debut session. The market now fears China will pivot to NAND flash memory—SanDisk's core business—and erode the company's 70% operating profit margins.

SanDisk does not compete directly with CXMT in DRAM, but the scale and enthusiasm behind the Chinese offering signals Beijing's semiconductor ambitions extend beyond memory types. CXMT's first-day gain ranks among the largest for any chip IPO globally, underscoring investor appetite for domestic alternatives and raising the prospect of state-backed competition in adjacent flash markets.

SanDisk's premium margins depend on technological lead times and pricing power in NAND. A well-capitalized Chinese entrant could compress both, particularly in cost-sensitive consumer and enterprise segments where Chinese manufacturers have historically undercut Western incumbents.