SK hynix shares jumped more than 10% after the company reported record third-quarter earnings and said nearly all of its DRAM and HBM production capacity through 2029 has already been allocated. The update suggests that demand for AI memory is still growing faster than supply. SK hynix plans to maximize output at its M15X facility and accelerate HBM4 production to meet orders from AI-chip and data-center customers. For traders, the key takeaway is that the AI infrastructure cycle remains strong at the hardware level. Tight HBM supply is positive for memory pricing and margins, supporting SK hynix and potentially MU. It also signals continued demand for NVDA accelerators, while MRVL, INTC, and SNDK could benefit from broader data-center investment. However, strong demand does not automatically mean semiconductor stocks will continue rising. Much of the AI-growth outlook may already be reflected in valuations, making the sector vulnerable to higher interest rates, weaker cloud capex, or production delays. The AI-memory story remains bullish, but the next phase will depend on whether companies can convert demand into higher output, stronger margins, and sustained earnings growth. Is SK hynix confirming another leg of the AI-chip rally, or is the good news already priced in? 👇