Lumentum Falls 10% as Optics Selloff Hits Hardest Where Capacity Is Sold Out; Applied Optoelectronics Drops 7%, Coherent Slides 7%

Lumentum (NASDAQ:LITE | LITE Price Prediction) stock is down 10% to $996.95 in midday trading, leading a sharp retreat across artificial intelligence (AI) optical connectivity names. This drop stands out because Lumentum’s production capacity is spoken for through early 2029, and that combination of the deepest decline with the longest order visibility frames the selloff.

For an optics/photonics sector check, the Roundhill Photonics & Optics ETF (CBOE:LYTE) is down 7% to $23.11. The SPDR S&P 500 ETF Trust (NYSEARCA:SPY) is essentially flat at $778.75, so the damage is staying inside one corner of the market. A 7% slide in the optical fund against a flat benchmark marks this as a group-specific selloff.

Meanwhile, Applied Optoelectronics (NASDAQ:AAOI) stock is down 7% to $101.50, falling less than Lumentum stock has. Additionally, Coherent (NYSE:COHR) stock is down 7% to $289.68, tracking Applied Optoelectronics stock almost step for step. All three had ranked among the strongest AI infrastructure winners heading into the decline.

A Sold-Out Order Book Meets Group Selling

None of the three companies has issued a new press release ahead of the decline. That leaves selling spread across the whole optical group. These are the same AI expansion suppliers we profiled in a free report on seven non-chipmakers powering the boom, with the three stocks and the fund dropping in together. The slide in Lumentum stock is the steepest of the group, which makes it the clearest gauge of how hard the selling is landing.

On October 9, Lumentum’s chief executive said the company’s AI optical components are booked through early 2029, and the optical names rose that day. Coverage framed that rally around Lumentum being unable to keep up with AI demand (Barron’s). Those remarks are three days old and aren’t the cause of the current decline.

What the Peer Group Says About Lumentum

As of its August 6 fact sheet, the Roundhill fund held Lumentum at 15.4% and Coherent at 15.2% of net assets, with Applied Optoelectronics at 2.1%. The fund and three stocks fell within a narrow range. The pattern points to group-level selling that hits every name regardless of its individual story.

Lumentum’s risk is that a stock up 170% year to date gives back the most when the group turns. At a forward P/E ratio of 43x, Lumentum stock carries little margin, and a full order book doesn’t protect a multiple. Lumentum shares also sit well above the 200-day moving average of $764.19, a sign of how far the run extended.

A bullish reading starts from an unchanged demand picture since October 9, because a sold-out order book signals demand running ahead of supply. Lumentum hosted its August 11 earnings call. On the call, Lumentum’s chief executive stated, “Pumped laser shipments surged more than 80% year over year, and we will remain effectively sold out for the foreseeable future, despite our rapid capacity expansion.” Management also said Lumentum reached its target operating model more than a quarter ahead of schedule.

What to Watch Next

The key question for Lumentum is whether its booked capacity turns into reported revenue on schedule. Lumentum guided for current-quarter revenue of $1.225 billion to $1.275 billion after posting $1.006 billion last quarter, up 109.3% year over year. Hitting that range could show the order book translating into results on time.

The 10% drop in Lumentum stock shows how fast the optical names can reverse together, even with demand intact. Investors should hold small enough stakes that a group-wide decline stays within their risk tolerance.

Contact [email protected] for any questions or corrections.