When the biggest player in your industry jacks up prices by 60%, that's usually good news for everyone else selling the same thing. That's exactly what happened Friday to U.S. memory chip makers Micron Technology Inc. (MU) and SanDisk Corp (SNDK), whose shares surged after Reuters reported that industry giant Samsung Electronics Co Ltd (SSNLF) has been aggressively hiking prices on key memory chips.

The AI Frenzy Strikes Again: According to the Reuters report, Samsung's price increases stem from "panic buying" for AI-related data centers. Since September, the South Korean tech behemoth has raised rates by as much as 60%, and the party might not be over yet. Samsung is reportedly eyeing another 40-50% contract price increase in the fourth quarter.

This isn't just about one company flexing its pricing power. The supply crunch is hitting both DRAM and NAND chips globally, which means the entire sector is getting a tailwind. For Micron, which competes head-to-head with Samsung in DRAM and high-bandwidth memory, tighter supply translates directly into stronger pricing power. Same story for SanDisk in the NAND market.

The underlying driver here is the insatiable demand for AI infrastructure. Data centers need massive amounts of memory to train and run AI models, and chipmakers can't produce enough fast enough. When supply gets tight and the market leader raises prices dramatically, competitors benefit from both elevated industry margins and validated demand signals.

Market Reaction: Investors clearly liked what they heard. Micron shares climbed 6.15% to $251.65, approaching their 52-week high of $257.07. SanDisk jumped even higher, up 7.02% to $260.49. Both stocks are riding the wave of optimism that this pricing environment could persist as AI infrastructure buildout continues.