Mizuho Flags Five AI Suppliers as Japan 225 Dispersion Widens

On May 16 Mizuho named Ibiden, Nittobo, Ajinomoto, Mitsui Kinzoku and Resonac as key beneficiaries of an AI-driven server CPU upgrade cycle, spotlighting T-glass, ABF film and microthin copper foil demand through 2027. The call follows a May 15 widening in an obscure Japan 225 dispersion measure driven by global flows into AI-exposed names. Returns are concentrating in a smaller set of stocks, lifting idiosyncratic risk and favoring active stock-pickers over passive index exposure. Several of the highlighted names posted sharp declines, with Nittobo falling 8.74 percent and Resonac down 7.97 percent, underscoring short-term volatility even as structural AI demand supports the sector.