行业周报：美股存储业绩超预期，海内外CSP持续加码AI资本支出-20260201

Investment Rating - The industry investment rating is "Overweight" (maintained) [2] Core Insights - The performance of the U.S. storage sector has exceeded expectations, with both domestic and international CSPs continuing to increase their AI capital investments [1] - Apple's strong iPhone sales and the success of Openclaw have significantly boosted revenue, with Q4 revenue reaching $143.76 billion, surpassing market expectations of $138.48 billion [5] - Meta's Q4 performance and AI capital expenditures have also exceeded expectations, with a capital expenditure guidance for 2026 revised up to $115-135 billion, nearly doubling year-on-year [5] - NAND flash manufacturers like SanDisk and SK Hynix reported outstanding results, with SanDisk's Q4 revenue at $3.025 billion, a 61% year-on-year increase, and SK Hynix achieving record highs in revenue and operating profit [6] Market Review - The electronic industry index saw a weekly decline of 2.18%, with consumer electronics down 4.74% and semiconductors down 0.83% [4] - Notable stock movements included a 21.62% increase in SanDisk and a 6.10% increase in Hua Hong Semiconductor [4]