Optics Stocks Divide: Coherent and Cisco Drop After Earnings While Nokia and Ciena Soar
Coherent and Cisco fell after fiscal Q4 results despite beating estimates. Coherent’s operating cash flow dropped 87% to $79.5M versus $1.10B capex, and Cisco’s gross margin fell to 66.3%. Ciena rose about 6% and Nokia about 3% on read-through of data center interconnect demand. Coherent revenue was $2.05B, Cisco revenue $17.25B.
How this was made

The 30-second read
Why it matters
Traders are repricing optics exposure based on two dimensions: (1) cash-flow and margin quality versus (2) perceived DCI demand inflection benefiting optical transport and interconnect equipment.
Market read
Same-day earnings reactions are being driven less by top-line beats and more by cash-flow and margin durability versus demand inflection for data center interconnect.
What to watch
COHR’s and CSCO’s selloffs emphasize cash flow and margin durability, which could also matter for CIEN and NOK later if capex or cost pressures rise.
Background
The article frames an optics complex split after fiscal fourth-quarter earnings, with Coherent and Cisco selling off while Ciena and Nokia rise on demand read-through.
Ticker impact
Coherent beat revenue and EPS but shares fell about 4.9% after operating cash flow dropped 87% and capex surged 150%.
Bearish bias for the next few sessions as traders reprice cash conversion and capex intensity.
The article cites a specific 87% operating cash flow decline versus rising capex, and ties the move to the post-earnings selloff.
Cisco shares dropped about 8.5% despite beating, as gross margin fell to 66.3% from 68.4% on AI hardware and memory cost inflation.
Further downside risk if investors continue to focus on margin durability rather than order growth.
The article directly links the selloff to gross margin compression and cites the margin figures and cost drivers.
Ciena rose about 6% as its earnings read-through confirmed explosive data center interconnect demand that benefits optical vendors.
Bullish near-term momentum likely persists while the demand narrative remains intact.
The article attributes the move to read-through from earnings calls and cites Ciena’s revenue growth and cloud mix, but does not provide a new CIEN-specific guidance number.
Nokia gained about 3.3% as earnings read-through supported surging AI and cloud order intake tied to data center interconnect demand.
Mild-to-moderate upside bias as long as the DCI demand inflection narrative holds.
The article provides specific Nokia order intake growth context, but the price move is framed as read-through rather than a new Nokia guidance disclosure.
Market effects
Signals a bifurcation in optics: cash-flow and margin quality are being punished in some names, while demand-exposed pure plays are rewarded.
Primarily US-listed optics complex reaction; Nokia is ADR-listed so US trading reflects global demand sentiment.
DCI interconnect and coherent transport demand narrative is global and can influence supply-chain expectations for optical components.
Counterpoint
The rally in CIEN and NOK may be overly dependent on read-through from peers’ calls; if demand growth slows, the relative outperformance could reverse quickly.
Key entities
- public_companyCoherent
COHR, optics vendor that beat earnings but saw operating cash flow plunge 87% and capex jump 150%.
- public_companyCisco Systems
CSCO, networking and optics-related exposure that beat earnings but saw gross margin compress to 66.3%.
- public_companyCiena
CIEN, optical transport vendor that rose on confirmation of data center interconnect demand.
- public_companyNokia
NOK, ADR-listed telecom and optical exposure that gained on AI and cloud order intake read-through.
- public_companyLumentum
Referenced as providing a CEO quote about pump laser demand tied to DCI growth.



