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AI Data Center Optical Fiber

Fading6 new signals this week

Generative AI’s vast scale-up and scale-out networks are accelerating the shift from copper toward 800G, 1.6T and eventually co-packaged optical links. Rising fiber counts and tighter power budgets should lift demand for optical fiber, transceivers, lasers and related components. Suppliers with scarce high-speed manufacturing capacity and strong hyperscaler relationships gain pricing power, while copper-heavy data-center cabling franchises face share erosion. The theme began repricing after Nvidia’s May 2023 demand shock reset expectations for AI infrastructure spending.

How this story could end...

The endings this story genuinely supports, written from the same evidence as the story updates. The value ranges are illustrative examples of how the affected companies as a group could re-rate — not forecasts, targets or advice.

Mapping out the endings…

How the two sides have traded

The bull and bear baskets for this story, equal-weighted and indexed so the two lines start together.

Each scenario's basket — 3 months

Both sides on one chart — 9 stocks on the bull side, 1 stock on the bear side. Neither side is emphasised.

Each line tracks the 10 companies most exposed to this story, so a broad basket of loosely related names does not flatten it. The full list below is unchanged.

Jul 20, 2026 – Oct 20, 2026 · 67 sessions

Bull case +25.13%Bear case -2.58%

Equal-weighted performance of the 10 most exposed stocks over the last 3 months.

Most affected stocks

Bull case

GLWCorning
$158.64
Today0.00%3 months+312.59%
200-session avg $54.29+192.21% vs that average
Medium exposureLargely priced in

Its optical fiber, cable and connectivity systems benefit from denser hyperscale and AI data-center networks.

LITELumentum Holdings
$1093.22
Today0.00%3 months+42.80%
200-session avg $801.21+36.45% vs that average
High exposureLargely priced in

Demand for high-speed datacom lasers and photonic components rises as AI clusters migrate to faster optical links.

COHRCoherent
$332.60
Today0.00%3 months+16.54%
200-session avg $301.53+10.30% vs that average
High exposureLargely priced in

Its lasers, optical components and transceivers are critical inputs for high-speed AI networking.

5803.TFujikura
$4184.00
Today-6.69%3 months-6.44%
200-session avg $4846.50-13.67% vs that average
Medium exposureLargely priced in

Its high-density fiber-optic cables and related connectivity products are leveraged to expanding AI data-center interconnects.

5802.TSumitomo Electric Industries
$1940.00
Today-6.17%3 months-13.74%
200-session avg $2414.34-19.65% vs that average
Exposure: not rated yetLittle priced in

Its optical fiber, cables and advanced connectivity products gain from global data-center capacity additions.

PRY.MIPrysmian
$102.85
Today-4.24%3 months-17.72%
200-session avg $121.42-15.29% vs that average
Exposure: not rated yetLittle priced in

Its telecom fiber and data-center cabling portfolio benefits from greater fiber deployment inside and between AI facilities.

6869.HKYangtze Optical Fibre and Cable
$125.00
Today+0.81%3 months-29.66%
200-session avg $166.32-24.84% vs that average
Medium exposureLittle priced in

As a major fiber and cable producer, it offers direct exposure to rising optical-network buildouts in China and overseas.

300308.SZZhongji Innolight
$641.47
Today-2.95%3 months-36.11%
200-session avg $850.58-24.58% vs that average
High exposurePartly priced in

Its high-speed optical transceiver modules are central to 800G and 1.6T AI-cluster networks.

300502.SZEoptolink Technology
$295.50
Today-4.12%3 months-42.06%
200-session avg $397.18-25.60% vs that average
High exposurePartly priced in

Its data-center optical modules provide leveraged exposure to hyperscaler adoption of faster Ethernet links.

Bear case

BDCBelden
$111.96
Today0.00%3 months-2.58%
200-session avg $113.50-1.36% vs that average
Medium exposureLittle priced in

Its legacy copper-heavy enterprise cabling exposure faces substitution risk as bandwidth-intensive data-center links migrate toward fiber.

Reporting behind this story

Looking at what moved this story…