Lumentum’s 680% Run Created a New Portfolio ProblemVIEW IN BROWSER | FOLLOW LUKE ON 𝕏 
Lumentum (LITE) just gave investors exactly what they want from a long-term winner: another reason to keep holding. The optical-networking company just reported roughly $1.01 billion in quarterly revenue, more than double what it generated a year ago. Adjusted earnings jumped to $3.23 per share, and management guided the current quarter to between $1.225 billion and $1.275 billion in revenue. Wall Street had expected less on both counts. The underlying AI thesis is working. Data centers are growing larger. AI clusters are connecting more chips. More data has to move between those chips at greater speeds. And copper wiring can only carry that traffic so far before power consumption and physical constraints become a problem. That is where Lumentum comes in. Its lasers and optical components help move data through AI infrastructure using light. As the buildout scales, that technology becomes more essential. Nvidia (NVDA) clearly agrees. In March, it invested $2 billion in Lumentum and made a multibillion-dollar purchase commitment for advanced laser components. Lumentum is also expanding U.S. manufacturing to support the next generation of AI data centers. Last August, I recommended Lumentum in the AI Revolution Portfolio, where Louis Navellier, Eric Fry, and I bring together our highest-conviction AI ideas. That position is now up roughly 680%. 
The business continues to execute, AI optics demand keeps strengthening, and the original investment case remains firmly intact. But Lumentum’s success points to a larger lesson. A stock can keep getting better while the account around it becomes more dependent on it. That is the hidden cost of winning in AI. Why Lumentum Stock Became an AI Optical Networking WinnerLumentum was hardly an obvious AI winner when we recommended it. The stock did not have Nvidia’s brand recognition. It did not own a hyperscale cloud platform. And it was not building a frontier AI model. But AI data centers were running into a problem. The chips were getting faster, and the compute clusters were getting larger. Yet all those processors still had to communicate with one another. That made networking increasingly important. An AI cluster can contain thousands of high-end chips working on the same model. If data cannot move freely, and at speed, between those chips, it wastes expensive computing resources. More chips alone do not solve that problem. What must improve is the connections between them. Lumentum fits that bill to a tee. That was the opportunity we saw way back in August 2025. Since then, each earnings report has made the connection harder to ignore. The market eventually caught on that optics had become a critical piece of AI infrastructure, and Lumentum’s stock surged. The company earned it. Now consider what a return like that can do to a portfolio…
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How a 680% Winner Changes Portfolio ConcentrationSuppose Lumentum started as 5% of a portfolio. After a 680% gain, with every other holding unchanged, it would now account for roughly 29% of the entire portfolio. A position that started at 3% would now account for more than 19%. The investor did nothing wrong. In fact, they were spectacularly right. But the portfolio has changed. A measured position now drives nearly a third of the account. One earnings report, customer delay, supply-chain problem, or change in AI infrastructure spending can now have an outsized impact. None of this makes Lumentum a sell. We still like the business very much. But “hold” should never mean “stop thinking.” After a major run, investors need to reassess the stock’s role in the broader account: how much performance now depends on it, which other holdings share its risks, and whether the overall mix still reflects the original plan. Position size is part of the investment thesis, not an administrative detail worked in after the fact. Once a winner controls a substantial share of an account, the next dollar should not automatically follow the last one. New capital may do more by strengthening another part of the portfolio. That allows investors to build around the winner without abandoning the thesis that produced it. “We like this stock” tells an investor what looks attractive – but not how much to own, whether to keep adding, or where the next dollar belongs. Stock selection finds the opportunity. Allocation determines the role it plays. Every New AI Stock Competes for the Same Portfolio DollarThe AI market keeps producing fresh opportunities, but capital is finite. Every new position has to earn its place beside the winners already in a portfolio and the risks already being carried. As valuations shift, new opportunities emerge, and modest positions grow into major ones, the ideal mix changes, too. That broader evolution led Louis Navellier, Eric Fry, and me to revisit our AI Revolution Portfolio. After combing through more than 200 AI recommendations, Louis, Eric, and I narrowed the field to roughly 20 stocks we believe deserve capital now. We also assigned a recommended allocation to every holding. Subscribers will see which companies made the cut, how we believe the holdings should fit together, and how much of the portfolio we think each idea deserves. The AI boom is still creating exceptional opportunities. Lumentum shows the power of one great pick. Building a complete strategy takes another layer of work: deciding which opportunities belong together and how much capital each one deserves. That is what Louis, Eric, and I – together, with all our decades of combined experience – have built. On Wednesday, August 19, we’re unveiling the rebuilt AI Revolution Portfolio. Sign up now to see it as soon as it goes live. Sincerely, |
