Photonics Stocks Surge 113% YTD, Emerging as the Strongest AI-Linked Theme Globally
Nashnova编辑部
Photonics stocks have surged 113% year-to-date, dwarfing the MSCI World Index's 14% gain — Bank of America now ranks the sector as the top global investment theme of the year, a signal that capital sees optics as a non-negotiable layer of AI infrastructure.
Why has this sector gained 113%?
Photonics and optical stocks are up 113% YTD; the MSCI World Index gained just 14% over the same period. This means → the sector has outperformed the broad market by nearly 8×, making it the strongest global theme this year.
Bank of America's August 12 research note named it the top global investment theme of the year and flagged it in the top quintile of the bank's "triple momentum" screen — a composite of earnings, price, and news momentum.
The Tema Photonics & Optics ETF (ticker: LAZR) listed in late June and has already rallied 34% since August. In plain terms = a brand-new fund surging 30%+ in two months shows capital is front-running the trend.
Who are the biggest winners?
Two lead stocks have driven the sector: Coherent is up roughly 90% YTD; Lumentum has surged 163%.
Both have secured partnerships with Nvidia, which announced in March that it would invest $2 billion in each company to build out AI infrastructure R&D pipelines and supply chains. This means → Nvidia is placing its own capital behind optics — effectively issuing a confirmation that the market reads as "optical is a must-have for AI."
Beyond the two leaders, Applied Optoelectronics was cited by analysts as a lower-profile alternative within the same theme.
Why can't AI data centers do without optics?
Raymond James analyst Simon Leopold told CNBC that optical technology is "universally necessary" for AI buildout, spanning large language models, AI agents, and custom semiconductors. His analogy: optics is "the pavement on the highway — whether you're driving a truck, a motorcycle, or a sedan, you need the road."
Hyperscale data centers can span roughly 140,000 square meters in a single building. At those distances, copper cabling overheats and can even melt under high energy loads; fiber optics transmits more data at the speed of light with lower power draw. In plain terms = copper can't handle the distance — only fiber can.
The industry is also advancing co-packaged optics — integrating optical modules directly into chip packages to shorten the electrical-to-optical conversion path — and photonics-based specialty chips that deliver higher bandwidth, lower latency, and less heat than conventional silicon. This reflects a systemic upgrade that goes well beyond "swapping a cable," reaching down into chip-level architecture.
Valuations are steep — is now the time to buy?
Coherent trades at a forward P/E of roughly 35×; Lumentum sits at about 42×. Both are well above the S&P 500's approximately 20×. This means → the market has already priced in a substantial amount of future growth.
Paul Meeks, head of technology research at Independent Capital Markets, put it bluntly: "What you want to do is wait for a bad day, because it will come." He noted that July brought a wave of concern over "excessive AI spending with unclear returns," and similar volatility will recur.
Both leaders have locked in multi-year, multi-billion-dollar contracts with Nvidia, providing a degree of forward visibility — but high valuations mean any softening in AI-spending expectations could trigger sharp drawdowns. Put simply = the long-term thesis is clear, short-term swings are inevitable, and timing matters more than stock selection.
Content is for reference only, not financial advice.