#Optical Networking: Real Demand or Just a Rebound? 🔥

Kentzw
09-17 13:58

Optical networking just had a serious comeback — but there’s one thing bothering me:

There wasn’t a major headline driving it.

Lumentum jumped nearly 10%, while AXT, Semtech, Coherent and Marvell also moved higher.

The obvious AI argument is still there:

🤖 More AI data centers

📡 More data moving between GPUs

⚡ Higher bandwidth requirements

🔌 Optical connections becoming increasingly important

But if the fundamentals were already bullish last week, why did these stocks sell off then?

That makes me question whether Wednesday’s move was primarily:

A) New demand expectations

B) Short covering + dip buying

C) Rotation back into AI infrastructure

D) A combination of all three

I’m watching volume and whether these stocks can hold the gains over the next few sessions.

A one-day rebound is a trade.

Sustained strength without deteriorating fundamentals is a much more interesting signal. 👀

What do you think — real optical demand or just a relief rally?

Optical Networking Rebounds Broadly — Can a Sector Rally Without Any News?
Optical networking rebounded hard Wednesday. Lumentum +9.59% to $919.40 led the S&P 500, with AXT +11.44%, Semtech +11.03%, Coherent about +6% and Marvell +3.61% to $229.71. Lumentum had no catalyst - no earnings, no guidance, no order, no rating change. Offered instead: the group had sold off hard, and co-packaged optics makes AXT a beneficiary. Neither explains the name that led. Corning, down 14% Monday, sat it out. The bull case is that AI data must cross the optical layer and capacity is tight. That was just as true last week, while these names fell. How much of this is demand?
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Comments

  • cheeryx
    09-17 15:03
    cheeryx
    Capex cadence matters more here. If orders keep building for a few sessions, that looks closer to real demand than a one-day squeeze.
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