Memory Chips Soar as AI Boom Hits Tokyo Markets

If you hold tech stocks, AI-themed ETFs or semiconductor positions, this is about the core risk in your portfolio: is the AI rally a durable bull market or a bubble near its top? Markets are looking for the answer in memory chips. AI's wave has poured money into semiconductors, and memory in particular — AI workloads devour data — has seen demand surge and profits explode, lifting share prices. There's a familiar analogy: in a gold rush the safest business is selling shovels, and semiconductors are AI's shovels. But booming profits hide the industry's oldest risk: oversupply. Memory is a notorious cyclical; when every maker expands at once, capacity floods in a year or two later, prices crack and profits reverse. That's why the market watches the P/E ratio — when a price assumes profits stay this good forever, a supply turn triggers a fast, violent revaluation. This matters acutely in Taiwan, where the market is heavily weighted toward semiconductors. Three practical moves: know whether your positions ride real demand or narrative; don't extrapolate a profit spike forever; and treat the P/E as a thermometer — the higher it runs, the less room for error. Watch memory pricing and capacity plans.