Recently, as I’ve been researching the main investment themes for 2026, I found that the networking and communications sector is genuinely worth close attention. Many people still cling to the outdated idea that “networking is just installing Wi-Fi devices,” but in reality, the networking industry is completely different now.

So, simply speaking, what is networking? It refers to companies responsible for the supply chain of network communication equipment and components. This includes everything from the most basic fiber optic cables and base station components, to mid-tier switches and routers, and now the hottest Wi-Fi 7 sharing devices and low-earth-orbit satellite receiving equipment.

Why should we focus on networking now? There are several main reasons. First, the U.S. government’s $42.5 billion broadband equity, access, and deployment plan (BEAD) finally enters a full-scale construction phase in 2026, which is a tangible earnings tailwind for domestic fiber optic and networking companies. Second, as AI computing demand spreads from data centers to end devices, traditional copper transmission has become a system bottleneck, and optical communication technology has turned into the main solution for large-scale data transmission. In addition, with the widespread adoption of AI PCs and AI smartphones, people’s demand for network bandwidth is increasing, and Wi-Fi 7 penetration is expected to surge dramatically.

The networking industry chain is actually quite segmented. Upstream is core chips and materials—such as networking chipmakers like Broadcom and Marvell, as well as optical chip and silicon photonics material suppliers. This segment has the highest gross margins but also the highest technical barriers. Midstream is assembly and manufacturing. Taiwan is particularly strong here—for example, Zidao makes switches, Qisda makes broadband access equipment, and Walsin Optical makes optical communication modules. Downstream is made up of telecom operators, cloud service providers, and government tenders—these are the true equipment buyers.

When it comes to specific investment targets, in Taiwan stocks, Zidao leads the 800G switch market and has already been positioning for 1.6T specifications, making it one of the biggest beneficiaries of AI data center construction. Alphanetworks mainly makes laser chips related to silicon photonics and CPO technology, and in an environment of “optical entering copper retreat,” it has a deep moat. Qisda has a diversified product lineup covering Wi-Fi 7, connected vehicles, and the low-earth-orbit satellite supply chain—making it one of the Taiwanese companies best positioned to align with the U.S. BEAD plan. Walsin Optical focuses on high-end optical transceiver modules, and as it upgrades from 400G to 800G, its performance has been steady amid the AI transmission dividend.

On the U.S. stock side, Arista Networks is a leader in cloud networking equipment, with customers including Meta and Microsoft. Its low-latency network solutions specifically designed for AI training even outperform traditional industry giants like Cisco. Broadcom controls the lifeblood of networking chips—whether it’s Wi-Fi 7 chips or switch chips, it is a key supplier. Corning, as a global leader in fiber optic materials, benefits from U.S. manufacturing policies and has a near-monopoly position in broadband buildouts. Lumentum has technological breakthroughs in optical transceivers and optical components and is a dark horse in the 2026 AI optical communications boom.

However, investing in networking stocks also requires paying attention to several risks. Government tender funding is slow and subject to strict review. Earnings are recognized in batches rather than exploding all at once. If approval timelines get stuck, it’s easy to end up in a situation where the theme is hot but the financial statements show no money. 2026 is the transition year for CPO and 800G switch manufacturers, which is a hard-nosed test of manufacturers’ technical capabilities—second-tier players that can’t keep up may get sidelined. Keep a close watch on the inventory levels at large players like Amazon and Google. If data center construction slows down or the Wi-Fi 7 replacement cycle doesn’t meet expectations, networking companies will face pressure to offload high inventories. The BEAD plan requires a certain percentage of manufacturing to be done in the United States. To win tenders, Taiwanese companies may need to set up overseas factories, which will increase management costs and tax risks. Finally, pay attention to valuation risk—many networking stocks have been pushed to historical highs due to AI labels, and once revenue growth falls short of expectations, they are prone to significant corrections.

Overall, in 2026, networking is indeed a solid main theme driven by the dual engines of AI transmission and U.S. infrastructure. But my advice for new investors is to focus on leading companies with high technical barriers, and avoid chasing high prices on stocks that are driven by themes but lack solid fundamentals. At the same time, keep an eye on tender funding progress and inventory changes, so you don’t end up “earning the index but losing the spread.”