On June 9, 2026, stocks related to optical networking and components experienced a sudden and significant drop across the board.
The trigger for this event was a private report circulated to institutional investors. This report argued that the widespread rollout of a next-generation technology called Co-Packaged Optics (CPO) would be delayed beyond market expectations. The news sent shockwaves through the sector, with shares of key players like Applied Optoelectronics (AAOI) and Coherent (COHR) plummeting by as much as 17% and 11%, respectively, in a single day.
Interestingly, however, completely opposite news emerged during the same week. At the Computex event in Taipei, Nvidia announced that it had already begun shipping its new CPO switches to select partners and would ramp up production in the second half of 2026. This was not a 'delay' but a reaffirmation of its existing timeline.
So, why did the market react so sensitively? There were two key background factors. First was the burden of high valuations. Just before the plunge, the price-to-sales (P/S) ratios for companies like Lumentum (LITE) and Coherent were at all-time highs. When expectations are this high, even minor negative news can cause significant price swings. Second was fragile investor sentiment. Just days earlier, another industry peer, Ciena (CIEN), had seen its stock fall over 18% after its earnings report, spreading a sense of anxiety throughout the sector.
In fact, a look at the CPO technology roadmap suggests this turmoil could have been anticipated. Last year, market analysis firm Cignal AI forecasted that "initial CPO deployments will start in 2026, but mass adoption will take 3-5 years." Nvidia's 'H2 ramp-up' plan aligns perfectly with this forecast. In other words, 2026 is not about mass production but is the 'starting' phase of initial production and gradual volume increases.
In conclusion, the recent stock plunge appears to be a short-term overreaction, combining a poorly substantiated claim of a 'total delay' with high valuations and nervous sentiment. It's more likely that CPO technology, as planned, will mark 2026 as its inaugural year and will gradually transform the data center landscape over the next several years.
- Glossary:
- Co-Packaged Optics (CPO): A next-generation technology that integrates semiconductor chips and optical components into a single package to increase data transfer speeds and reduce power consumption.
- Pluggable Optics: Conventional optical communication components that can be easily inserted into and removed from ports on data center switches or routers.
- Price-to-Sales (P/S) Ratio: A valuation metric that compares a company's stock price to its revenues. It is calculated by dividing the company's market capitalization by its total sales over a 12-month period.