Key Highlights

● Lumentum chief executive Michael Hurlston said optical capacity is sold out into 2029, with some Demand unfilled.

● Hurlston said relief from the shortage is unlikely before 2029 or 2030, though outlets differed slightly on the exact horizon.

● Applied Optoelectronics closed at $109.64, up $3.74, and Coherent traded around $316.68 in the morning.

● Optical links use lasers to carry data as light because copper struggles at the speeds and distances involved.

Most companies avoid telling the world they cannot meet demand. On Friday, Lumentum Holdings (NASDAQ:LITE) did exactly that, and investors cheered. In an interview in Tokyo, chief executive Michael Hurlston said the company's optical capacity was sold out into 2029, and that for some products Lumentum could not Fill about seven-tenths of customer demand through next year.

"We are completely sold out, with no end in sight," Hurlston said. He added that relief from the shortage is unlikely before 2029 or 2030. Accounts of the exact horizon differed slightly, with some reporting early 2029 and others the whole of 2029, but the message was the same: demand is running far ahead of supply.

The shares were already sharply higher before the opening bell, trading around $1,112 in premarket dealings, and they closed with a solid gain on the Nasdaq Composite.

Why the shortage exists

Artificial-intelligence data centers are built from thousands of processors that must constantly exchange data. Copper wiring struggles at the speeds and distances involved, so the industry increasingly relies on optical links, which use lasers to carry data as light. Lumentum makes many of the lasers and components at the heart of those links.

Building more capacity for these parts is slow. Production of advanced lasers requires specialized facilities and long qualification processes with customers, which is why a supplier can find itself sold out for years even as orders keep arriving. For investors, a long Backlog can translate into better pricing power and more predictable revenue.

Read-through across the optics group

The comments traveled quickly. Applied Optoelectronics (NASDAQ:AAOI) closed at $109.64, up $3.74, after trading even higher before the open. Coherent (NYSE:COHR) traded around $316.68 in the morning, and Ciena (NYSE:CIEN) and Corning (NYSE:GLW) also moved higher, according to market data.

The optics rally stood out on a day when the wider chip sector lagged. The PHLX Semiconductor index slipped, Nvidia (NASDAQ:NVDA) fell $1.20 to $229.28 and Micron (NASDAQ:MU) eased to $1,029.00. Investors were still digesting Thursday's media report that OpenAI's annualized Revenue was about $50 billion at the end of September, roughly $20 billion below a figure that had circulated weeks earlier. Hurlston's remarks offered a counterweight: whatever the uncertainty about AI revenue, the physical bottlenecks in the build-out remain real.

The market around it

Stocks rose broadly. The Nasdaq Composite gained 172.83 points to 27,366.17, the S&P 500 added 46.18 points to 7,811.54, about seven points shy of Tuesday's record close, and the Dow climbed 423.31 points to 51,654.95. Software and Cybersecurity led the technology rebound.

Macro pressures persisted. The 10-year Treasury Yield held near a 24-year high, the Fed raised rates in September for the first time since 2023, and Fed Governor Christopher Waller said Thursday he anticipates additional hikes to bring Inflation back to the Fed's goal. George Saravelos of Deutsche Bank (NYSE:DB) has warned that "The biggest systemic risk in the market next year is not France but 'something going wrong' in the AI ecosystem."

New Capacity Timelines and TSMC's October 15 Results Will Test the Optical Shortage Story

Monday, October 12 is Columbus Day, with stocks open and the Bond Market closed. September consumer prices are due Wednesday, October 14, bank Earnings run from October 13 to 16 and the Fed meets on October 27 and 28. Investors will watch whether Lumentum gives more detail on capacity additions and on how quickly new Supply can come online. TSMC (NYSE:TSM)'s results on Thursday, October 15 will offer another read on AI hardware demand.