Coherent Jumps 13% as Optical Stocks Extend AI Rebound

Coherent (NYSE:COHR) traded at $217.80 on November 9, up 13% in early action, as optical stocks added a second leg to their AI rebound. The photonics and laser maker led a broad group of AI infrastructure names recovering from the previous week's sharp tech selloff.

Lumentum (NASDAQ:LITE) followed at $596.36, up 11%. Applied Optoelectronics (NASDAQ:AAOI) rose 4% to $52.03. Ciena (NYSE:CIEN) climbed 9% to $264.82, and Fabrinet gained 8% to $354.69. Major indexes were also higher as investors returned to AI shares and oil slid.

The stakes for the sector are straightforward. Last week's selloff came on fears that Democrats' midterm wins would bring tighter data center rules, and that policy overhang has not disappeared. Monday's rally shows investors are once again willing to price AI infrastructure growth, but the size of each company's gain tracks its latest results and outlook rather than sentiment alone.

What did Coherent report?

Coherent disclosed on November 4 that its fiscal Q1 2027 revenue rose 50% year over year to $2.37 billion. For Q2, management guided revenue to a range of $2.55 billion to $2.75 billion. The company tied its growth to a structural shift inside AI data centers: operators are moving from copper to optical connectivity, which directly increases demand for Coherent's components.

Wall Street split on the stock after the report. J.P. Morgan maintained its $385 price target on Coherent on November 5. BofA cut its target to $240 from $400. That gap of $145 between two major banks' targets frames the debate: one sees the optical transition as worth paying for, the other does not at current prices.

Cash is the main worry analysts flag. In the September quarter, Coherent posted negative operating cash flow of $92.7 million against capital expenditures of $775.5 million. That is a heavy burn rate for a company delivering 50% revenue growth, and it explains why the stock sold off last week and why the rebound drew buyers back only selectively.

Why is Lumentum moving with Marvell?

Lumentum's 11% gain has a different mechanism behind it. Marvell Technology (NASDAQ:MRVL) agreed to buy Lumentum in an all-stock deal expected to close in the first half of 2028. Under that structure, Lumentum shares largely move with the acquirer's share price. Marvell traded at $153.40 on November 9, up 9%, meaning Lumentum ran slightly ahead of its buyer during the session.

The pending acquisition also reshapes the competitive map for Coherent, and Coherent's chief executive addressed it directly. Jim Anderson, speaking on the November 4 earnings call, said: "I think for a lot of our customers, I think it's really important that they have an independent photonic optical supplier and partner." His argument positions Coherent as the neutral supplier in a sector where one major player is being absorbed into a chip company.

Why did Applied Optoelectronics lag the group?

Applied Optoelectronics gained 4%, the weakest move in the group, and its November 5 report explains why. The company posted record Q3 2026 revenue of $269.9 million but guided Q4 2026 revenue below consensus, setting a range of $385 million to $420 million. A shortage of digital signal processor chips limited shipments of its next-generation 1.6-terabit transceivers.

The company also cut its end-2026 capacity goal for its Texas plant to more than 500,000 units a month, down from 650,000, after delays in getting power to the facility. Analysts reacted with the same split visible across the sector. Raymond James trimmed its target to $165 from $178 while keeping an Outperform rating. B. Riley cut its target to $45 from $92, a steeper reduction than nearly the entire share price. The modest 4% gain suggests the market is still weighing the supply and power constraints against the record revenue.

Management expects the DSP chip shortage to improve in the first quarter of 2027.

How do the three companies differ?

The three names moving on Monday are not interchangeable, and the differences matter for how the AI optical trade develops:

• Coherent is vertically integrated. It spans materials and crystal growth through optics and lasers, and it still runs an industrial segment serving semiconductor equipment, AI server circuit-board drilling and fusion.
• Lumentum focuses on high-speed transceivers, optical components and optical circuit switching. Once the Marvell deal closes, its future lies inside Marvell's chip portfolio.
• Applied Optoelectronics is a much smaller transceiver maker that also leans on a cable TV broadband business and a short list of large customers.

Ciena's and Fabrinet's participation in the rally reinforces the breadth of the move. Strength in a networking-systems maker and a contract manufacturer alongside the component makers points to a sector-wide recovery rather than a reaction to any single earnings report.

What comes next for the optical trade?

Coherent now faces a direct test: whether its heavy spending converts into positive cash flow while the company delivers on its Q2 guidance of $2.55 billion to $2.75 billion. The bull case rests on multi-year customer agreements, expanding margins and management's comment that calendar 2027 is basically booked out. The bear case points to the cash drain, rising debt and BofA's reduced target.

Applied Optoelectronics must prove it can secure DSP chips and power for its Texas plant fast enough to hit even its lowered capacity goal. Lumentum's story now runs through Marvell's share price and the first-half 2028 closing timeline.

Policy remains the sector-wide wildcard. Fresh headlines on data center rules could resume last week's selloff across Coherent and the rest of the optical group. A cautious investment approach could make sense while the debate over Coherent's cash burn plays out and Washington's posture toward data centers clarifies.