Nvidia Gets The Headlines. But This Optical Networking Stock Was The Bigger AI Surprise

Coherent’s stock surged more than 400% over the past 12 months as AI- and cloud-driven data center upgrades boosted demand for its optical networking products. Fiscal 2025 revenue rose 23%, and analysts now expect a 30% CAGR in revenue through fiscal 2028, with EPS turning positive in fiscal 2026. The article is constructive on Coherent’s long-term prospects, but it flags a rich valuation at 63x fiscal 2027 earnings that could limit near-term upside versus Nvidia.

Analysis

COHR’s rerating is not just a story about AI demand; it is a market signal that optical bandwidth has become the next bottleneck after compute. That matters because once a platform shift turns from “nice-to-have” to “must-upgrade,” customers tend to buy in multi-quarter waves, which can create a temporary revenue air pocket for the suppliers downstream of hyperscale capex. The second-order winner is the broader optical stack: transceivers, laser engines, packaging, and test equipment should all see a higher attach rate, while legacy copper/interconnect vendors face accelerating share loss.

The key risk is that the market is extrapolating a multi-year TAM story into a near-term multiple that already discounts a lot of execution. When a stock moves this far this fast, the next leg is usually determined less by end-demand and more by whether supply can scale without margin leakage, inventory bloating, or mix dilution. If 800G ramps slower than expected, or 1.6T timing slips, the valuation can compress quickly because the equity is now priced like a premium AI infrastructure compounder rather than a cyclical components supplier.

The cleaner trade here is probably not a naked long in COHR, but a relative-value expression versus the most direct beneficiaries of the same capex cycle. NVDA still has the stronger earnings power and a much lower multiple, so the spread argues for NVDA as the higher-quality AI exposure if the market broadens beyond optics. The contrarian takeaway is that COHR’s move may be directionally right but temporally ahead of fundamentals; the stock can keep working if hyperscaler budgets stay intact, but the margin of safety is thinner than the growth narrative implies.

Key Decisions for Investors

• Rotate incremental AI hardware exposure from COHR into NVDA over the next 1-3 months; NVDA offers better growth-adjusted valuation and should outperform if AI capex remains broad-based.
• Pair trade: long NVDA / short COHR as a relative-value expression into the next earnings cycle; target 10-15% spread capture if COHR multiple normalizes while NVDA earnings revisions hold.
• For higher-conviction upside in COHR, prefer call spreads 3-6 months out rather than common stock; the thesis is intact but valuation leaves limited cushion if growth merely meets expectations.
• Watch for any sign of 1.6T deployment delays or weaker datacenter lead times; use those as triggers to trim COHR exposure aggressively because the stock is now priced for uninterrupted execution.