Friends who have been paying attention to networking stocks should have a feeling that this industry is no longer the simple concept of pulling lines to install Wi-Fi as in the past. By mid-2026, the entire networking sector has evolved into a strong group combining AI computing demands, policy incentives, and technological upgrades.

I notice that there are actually two main themes driving this wave of market movement. One is the U.S. $42.5 billion BEAD broadband deployment plan entering full-scale construction, which is a tangible positive for domestic fiber optic and networking equipment manufacturers. The other is the official commercial phase of CPO co-packaged optical technology and 800G/1.6T high-end switches, as traditional copper transmission has become a bottleneck for system performance, and optical communication technology has become the main solution for large-scale computing.

Simply put, networking concept stocks refer to companies responsible for network communication equipment and related component supply chains. From the bottom layer of fiber optic cables and base station components, to mid-tier switches and routers, and now to the hottest Wi-Fi 7 routers and low-earth orbit satellite receivers, all are included.

The industry chain structure is actually quite intricate. Upstream includes core components and key materials, such as networking chips, optical communication components, and PCB substrates, which have the highest gross margins but also the highest technical barriers. Midstream involves assembling these components into complete devices, a strength particularly of Taiwanese manufacturers, such as switches, broadband access equipment, and optical communication modules. Downstream includes the end buyers, such as cloud service providers, telecom operators, government projects, and end consumers.

Regarding leading companies, Taiwan’s ZTEK is indeed a leader in the global data center switch market, with a leading share in the 800G market, and is now actively developing 1.6T specifications. Lumentum leverages its advantages in silicon photonics and CPO technology, providing key laser chips and epitaxial materials, with a strong technological moat. Airoha has a more diversified product line, involving Wi-Fi 7, vehicle networking, and low-earth orbit satellites, making it one of the Taiwanese companies most directly aligned with local needs in the U.S. BEAD plan. StarLight focuses on high-end optical transceiver modules and performs steadily amid the wave of upgrading from 400G to 800G.

On the U.S. networking giants side, Arista Networks is a leader in cloud network equipment, with clients including Meta and Microsoft. Its low-latency solutions designed for AI training outperform traditional leader Cisco. Broadcom controls the lifeblood of networking chips, with strengths in Wi-Fi 7 chips, switch chips, and customized AI chips. Corning, as a global leader in fiber optic materials, almost monopolizes the U.S. broadband construction due to the BEAD plan’s requirements for domestic fiber capacity. Lumentum’s breakthroughs in optical transceivers and optical components have made it a dark horse in this wave of AI optical communication boom.

However, investing in this sector also requires attention to several risks. Government project funding is usually slow and highly scrutinized, so companies like Airoha and Chihlee may not see explosive performance all at once but rather recognize revenue in batches as projects progress. If the approval process stalls, there could be a situation where the theme is very hot but the financial reports show no money. Technological upgrades are also a tough test; second-tier manufacturers that cannot keep up with CPO technology thresholds may be marginalized.

Additionally, watch out for inventory cycles. After the AI construction boom from 2024 to 2025, in 2026, closely monitor the inventory levels of major clients like Amazon and Google. If data center construction slows down or Wi-Fi 7 upgrade waves are weaker than expected, networking companies will face pressure to clear high inventories. Geopolitical factors are also variables; the BEAD plan requires a certain proportion of U.S.-made products, and Taiwanese companies may need to establish overseas factories to win bids, increasing management costs and tax risks.

Finally, valuation issues must be considered. Because networking stocks have been tagged with AI labels, many stocks’ P/E ratios have already reached historic highs early in the year. When market expectations are too high, even slight revenue growth below expectations can cause sharp corrections in stock prices, despite continued growth. It is recommended to focus on leading companies with technological barriers and observe whether their revenue growth rates can sustain the current high valuations.