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Home/Chips & Networking/Bottlenecks/Networking
US · Chips & Networking

AI Networking (Switches & Retimers)

Every additional GPU in a training domain multiplies switch ports and retimers. Ethernet vs proprietary fabrics decides who captures it.

SerDes→Switch ASIC→Retimer / AEC→Cluster
62
Tightness score ⓘ
#32 of 56
■ Stable
Supply concentration4
Lead time2
Capex intensity3
Geopolitical exposure2
Pricing power4
Lead time
6–9 mo
Theme 1M
−15.5%
% in uptrend
0%
Metric to watch

Switch ASIC cadence, AI back-end network revenue, and retimer/AEC attach rates.

What would prove us wrong

Weakens if cluster sizes plateau and network spend per accelerator falls.

Dependencies
↑ supplier  Optical Transceivers (800G / 1.6T)76↑ supplier  Fiber, Cable & Connectors68↑ supplier  AI PCBs & Laminates (CCL)70 ↓ customer  AI Server Racks (Taiwan ODMs)52

Networking theme performance

Equal-weight · rebased 100 · 1Y
Stocks we track

Who controls this bottleneck

Roles, not recommendations. Delayed prices; local currency.

StockRoleListingLast1D1M3MYTDOff 52w highTrendNext earnings
ANET
Arista Networks
 Ethernet switching for AI back-end networks NYSE
US		 $168.9 −8.34% −17.4% −8.7% +28.9% −22.1% 2026-11-03
AVGO
Broadcom
 Custom ASICs and Ethernet switch silicon for hyperscaler clusters NASDAQ
US		 $326.1 −5.48% −5.1% −16.7% −5.3% −32.1% 2026-12-09
CSCO
Cisco Systems
 Switching and silicon for AI networks NASDAQ
US		 $104.5 −3.76% −3.5% −9.4% +38.2% −19.0% 2026-11-12
CRDO
Credo Technology
 Active electrical cables and SerDes NASDAQ
US		 $151.0 −8.65% −28.2% −30.9% +4.9% −50.1% 2026-11-30
ALAB
Astera Labs
 PCIe/CXL retimers and scale-up connectivity NASDAQ
US		 $258.7 −10.93% −27.4% −19.4% +55.5% −46.4% 2026-11-03
NVDA
NVIDIA
 Demand aggregator for HBM, packaging, optics and robotics compute NASDAQ
US		 $204.6 −4.22% −11.4% −0.9% +10.0% −14.5% 2026-11-17

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