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A cluster of niche AI infrastructure stocks moved sharply this week: a little-known AI chip company saw its stock double after unveiling chips that double optical speed; former Intel CEO Pat Gelsinger backed a $100 million challenge to Nvidia's AI networking dominance, a move seen as potentially benefiting AMD; and in the optics trade, Lumentum jumped nearly 10% while rival Corning barely moved, raising questions about whether the AI optics trade is splitting apart. The divergent moves highlight investors' intense focus on distinguishing winners within the AI data-center supply chain, as capital rotates toward companies seen as best positioned to benefit from continued hyperscaler infrastructure spending.