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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
−12.2%
% in uptrend
17%
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		 $178.9 +3.81% −13.4% +5.4% +36.6% −17.4% 2026-11-03
AVGO
Broadcom
 Custom ASICs and Ethernet switch silicon for hyperscaler clusters NASDAQ
US		 $330.6 +2.76% −6.3% −13.1% −4.0% −31.1% 2026-12-09
CSCO
Cisco Systems
 Switching and silicon for AI networks NASDAQ
US		 $110.7 +3.92% +4.1% −3.9% +46.3% −14.2% 2026-11-12
CRDO
Credo Technology
 Active electrical cables and SerDes NASDAQ
US		 $155.4 +5.48% −26.4% −19.2% +8.0% −48.6% 2026-11-30
ALAB
Astera Labs
 PCIe/CXL retimers and scale-up connectivity NASDAQ
US		 $266.1 +3.46% −27.0% +2.2% +59.9% −44.9% 2026-11-03
NVDA
NVIDIA
 Demand aggregator for HBM, packaging, optics and robotics compute NASDAQ
US		 $216.0 +2.38% −4.0% +9.8% +16.1% −9.7% 2026-11-17

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