Lumentum, Coherent, and Vertiv Added to the S&P 500 As AI Stocks Dominate Rebalancing

"Getting added to the S&P 500 is not just a badge of honor. It is a structural buying event. Over $7 trillion is benchmarked to the S&P 500, meaning every passive index fund and ETF tracking the index is now required to purchase shares of LITE, COHR, and VRT ahead of the rebalancing effective date."

"Lumentum makes the lasers, transceivers, and optical components that move data at the speed of light inside AI data centers. Think of it as the plumbing that makes hyperscale AI possible. NVIDIA made a $4 billion investment in Lumentum and Coherent this week."

"The simultaneous addition of two photonics companies alongside the dominant data center power infrastructure provider signals something bigger: the AI trade has moved from speculative to structurally embedded in the American economy."

Three AI infrastructure companies—Lumentum, Coherent, and Vertiv—were added to the S&P 500 during quarterly rebalancing. Lumentum and Coherent manufacture photonics components essential for data center operations, while Vertiv provides power infrastructure. This simultaneous addition represents a structural shift in AI's economic integration. S&P 500 inclusion triggers mandatory purchases from passive index funds and ETFs tracking the index, representing over $7 trillion in benchmarked assets. This creates a wave of price-insensitive buying for these stocks. Lumentum has surged 814% over the past year and currently trades at $558.44, though shares declined 25% in the past five days after reaching $783.80.

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