Lumentum Holdings, the corporate that makes the optical plumbing for AI’s most power-hungry knowledge facilities, is getting a promotion. The photonics specialist will be a part of the NASDAQ-100 Index on Might 18, changing CoStar Group, which was bumped resulting from its comparatively decrease market capitalization.
Nasdaq made the announcement on Might 8, and the market responded predictably. Lumentum shares gained 5.39% in pre-market buying and selling, a modest encore for a inventory that has already climbed greater than 1,200% since early 2024.
The numbers behind the nod
Take a look at Lumentum’s trajectory. The inventory rallied 339% in 2025 alone, propelled virtually fully by demand for optical elements that energy high-speed knowledge transmission in AI and cloud computing infrastructure.
The corporate’s most up-to-date earnings report, from April 25, backed up the hype with precise income. Lumentum posted $452 million in Q1 2026 income, an 18% enhance year-over-year. That progress got here from the 2 sectors each {hardware} maker desires publicity to proper now: synthetic intelligence and cloud computing.
CoStar Group, a business actual property analytics agency, drew the quick straw within the NASDAQ-100’s periodic rebalancing. The index repeatedly swaps constituents based mostly on market capitalization, and CoStar’s valuation merely couldn’t hold tempo with the AI-fueled surge lifting corporations like Lumentum.
Why index inclusion issues greater than you assume
Each index fund and ETF that tracks the NASDAQ-100 should now buy Lumentum shares to match the brand new composition. That pressured shopping for creates actual demand, no matter whether or not any particular person fund supervisor thinks the inventory is pretty priced.
Analysts forecast a possible 10-15% short-term upside for LITE inventory particularly due to these index fund inflows. That’s on prime of the 5.39% pre-market pop the inventory already loved after the announcement.
What this implies for buyers
The bull case for Lumentum is easy and compelling. AI infrastructure spending reveals no indicators of slowing, and optical networking sits on the bodily layer of that buildout. An 18% year-over-year income enhance is wholesome, and the NASDAQ-100 inclusion ought to present an extra tailwind by way of passive fund flows.
The bear case, although, deserves consideration. Analysts have flagged the potential for overvaluation, significantly given the broader volatility within the tech sector. There may be additionally a delicate danger within the index inclusion itself. The preliminary wave of passive shopping for can inflate a inventory’s value past what fundamentals help, making a setup for a correction as soon as the mechanical flows subside.
For crypto-focused readers, the connection is oblique however value noting. The identical optical networking infrastructure that powers AI knowledge facilities additionally underpins the high-speed connectivity that large-scale blockchain operations, mining amenities, and decentralized computing networks depend on. Lumentum just isn’t a crypto firm, and no tokens or digital property are tied to its NASDAQ-100 inclusion.
