The switches and links that let thousands of GPUs behave like one machine.
Sorted by one-month move. “Vs target” compares the current price with the mean analyst price target — a figure from analysts, not from us.
| Company | Price · todayThe latest closing price, and how far it moved from the previous close in dollars and percent. | 1 MonthPrice change since the last close on or before the same date one month ago — a calendar month, not 21 trading days. | 1 YearPrice change since the last close on or before the same date one year ago. | Vs targetHow far the price sits below the average of analysts’ published 12-month price targets. Negative means the price has already risen past that average.Analysts’ figures, not ours. Not a forecast we make or endorse. |
|---|---|---|---|---|
| ANETArista Networks | $199.39-$0.14 (-0.07%) | ▲ 3.2% | ▲ 36% | ▲ 21%$185 … $289 |
| ALABAstera Labs | $303.25+$9.69 (+3.30%) | ▼ 0.1% | ▲ 20% | ▲ 29%$190 … $500 |
| CIENCiena | $348.80+$4.55 (+1.32%) | ▼ 14.0% | ▲ 153% | ▲ 44%$325 … $660 |
| CRDOCredo Technology | $175.89+$7.64 (+4.54%) | ▼ 28.5% | ▲ 2% | ▲ 61%$185 … $350 |
As of close, Sep 18, 2026 · prices from Yahoo Finance
Data: daily close · Reporting, not recommendations · Not financial advice.
Training a large model needs thousands of accelerators behaving as one machine. Networking is what makes that possible — the switches, links and protocols that move data between chips fast enough that they are not left waiting.
As clusters grow, the share of total cost sitting in networking rises. Interconnect performance increasingly determines how large a usable cluster can be, which is why this sector tracks accelerator deployments closely.
What moves it: cluster build-outs, port-speed transitions, and competition between networking standards.
The Weekly Pulse covers Networking & Interconnect alongside every other sector — one email, Sunday, free.
A training run splits work across many accelerators that must constantly exchange results. If the network is slower than the chips, expensive processors sit idle waiting on data.
A component that cleans up and regenerates a high-speed signal so it can travel further without errors. As data rates rise, signals degrade over shorter distances and more of these are needed.
Networking covers the switching and protocol layer; optical covers the physical light-based transmission between racks. They are adjacent layers of the same problem.