Optics Stocks Slide as AI Hardware Trade Cools: Applied Optoelectronics and Lumentum Fall 6%, Coherent Drops 5%

The AI optical connectivity trade is cooling this Friday afternoon, with the same names that led August higher pulling back in unison. The selling concentrates in AI hardware rather than one company or the market broadly, which changes how investors can read the move.

The iShares Semiconductor ETF (NASDAQ:SOXX) is down 3% to $508.7, signaling sector-wide pressure across chip and hardware names. The SPDR S&P 500 ETF Trust (NYSEARCA:SPY) is down only 0.3% to $768.84, showing that the broad market is largely unbothered. That gap tells the whole story: a narrow AI hardware selloff while the broad market barely moves.

Applied Optoelectronics (NASDAQ:AAOI) stock is down 6% to $106.18, sitting at the weak end of the group. Meanwhile, Lumentum Holdings (NASDAQ:LITE | LITE Price Prediction) stock is down 6% to $900, matching that decline. Coherent Corp. (NYSE:COHR) stock is down 5% to $281.06, sliding slightly less, while Corning (NYSE:GLW) stock is down 2% to $148.99, holding up best of the four.

Profit Taking Grips the AI Optics Trade

Each of these companies supplies optical interconnect into AI data centers, so Applied Optoelectronics, Lumentum, Coherent, and Corning share a single demand driver and reprice together when sentiment on AI hardware spending shifts. That’s why coordinated selling appears across transceiver, laser, and fiber names on the same afternoon, even without company-specific news at three of the four.

The pullback looks unsurprising against how far these stocks have run. Applied Optoelectronics was up 225% year to date (YTD) through Thursday’s close, and Lumentum was up 159% YTD through Thursday’s close. Coherent was up 60% and Corning was up 75% over the same window, so a group this extended tends to get sold hard when the trade cools.

No company announcement, earnings release, contract, or analyst rating change has been verified at Lumentum, Coherent, or Corning today. A macro trigger doesn’t fit either, since the SPY ETF’s move is small and the selling is narrowly concentrated in AI hardware. Profit taking after a run of this size is the simplest explanation for the price action.

Applied Optoelectronics Carries a Company-Specific Overhang

Applied Optoelectronics sits at the weak end for a reason beyond the group repricing. Multiple outlets reported this week that the company launched a $600 million at-the-market equity program, and Applied Optoelectronics stock fell sharply on Monday, August 24 as dilution concerns spread. The company itself hasn’t confirmed the program, so this can be treated as reporting rather than a filed disclosure.

That overhang is specific to Applied Optoelectronics and doesn’t extend to Lumentum, Coherent, or Corning. It helps explain why AAOI stock is trading in line with Lumentum stock on percentage today despite Applied Optoelectronics being the smaller and more volatile name in the peer set. The sell-side consensus price target on Applied Optoelectronics stock still sits at $163.4, well above today’s level, so analysts haven’t formally reset expectations around the reported ATM.

Reddit chatter on Applied Optoelectronics stock has skewed bullish to very bullish over the past week, which suggests retail is buying the dip rather than adding to the pressure. The overhang appears tied to institutional-sized supply concerns while sentiment on the underlying AI capex story stays intact.

How the Optics Group Ranks Today

Ranking the moves plainly frames the day. Applied Optoelectronics and Lumentum are falling hardest, Coherent is falling somewhat less, and Corning is holding up best of the four. That order roughly mirrors how leveraged each business is to pure AI transceiver demand versus a broader product mix.

The scorecard shows what today is and isn’t. The group is giving back a slice of an exceptional run, and no single reading suggests the underlying AI capex thesis has broken (we profiled seven suppliers powering the AI buildout, from power to cooling to optics, in a free report you can grab here). Corning’s lighter drop reflects its broader business mix, where fiber is only one leg of a multi-segment story.

What to Watch

Traders can watch for buying support into the afternoon, since holding these levels would signal that profit taking is contained rather than the start of a deeper AI hardware unwind. Any incremental hyperscaler capex commentary or supplier guidance could shift sentiment quickly, so headline risk cuts both ways from here.

For investors holding this group, moderating exposure after a run of this size is defensible. Position sizing should reflect the beta these names carry, with Applied Optoelectronics near 3.79 and Coherent near 2.11, so their moves magnify any change in AI hardware sentiment. Shareholders should keep their stops disciplined and their risk sized to what a further pullback in AI hardware could do to their positions.

Contact [email protected] for any questions or corrections.