Micron Technology is facing a new competitive and geopolitical risk as Apple weighs buying memory chips from Chinese suppliers, including ChangXin Memory Technologies, or CXMT, even after Washington said it does not want the iPhone maker sourcing memory from China. Commerce Secretary Howard Lutnick said Apple has sought approval to buy chips from CXMT and is already testing them, while the U.S. Senate has given Apple until Aug. 21 to answer bipartisan lawmakers' questions on whether it will exclude CXMT and other Pentagon-designated Chinese memory companies and disclose details of supplier testing. The issue matters for Micron because Apple is a major buyer of premium mobile memory, and any shift in orders could affect high-margin DRAM, NAND and HBM supply dynamics and strengthen rival suppliers in future contract talks. Analysts are watching Micron's upcoming filings and conference commentary for any changes in large-customer mix, long-term agreement volumes, or pressure in mobile and AI data-center contracts. Micron shares still advanced 10.7% over the past week to $971.66 and rose another 1% in overnight trading late Sunday, helped in part by a 2.4% rise in South Korea's KOSPI, but retail sentiment on Stocktwits turned bearish as traders questioned whether the rally could hold and whether the stock can reclaim $1,000.