Shares of optical module makers rallied sharply on September 7, with ZJ Innolight, the sector's core player, surging 10.38% to close at 898.46 yuan on turnover of 37.635 billion yuan, the highest in A-shares, lifting its total market value back above 1.06 trillion yuan. The company's H-shares jumped 17% to HK$1,177, while peers such as Tunchuang Technology, LianTe Technology, and Yuanjie Technology all rose over 10%.

The direct catalyst for this explosive move was a first-time coverage report published by Goldman Sachs that day. The investment bank initiated coverage on ZJ Innolight's H-shares with a Buy rating and a 12-month price target of HK$3,267, while also reiterating its Buy rating on the A-shares with a target of 2,645 yuan. Based on that day's closing prices, the implied upside potential in both markets is approximately 225%.

Goldman Sachs' Bold Earnings Forecast

The significance of Goldman's report goes far beyond a simple Buy rating, with the most striking element being the aggressiveness of its earnings projections. Goldman forecasts a 78% compound annual growth rate for ZJ Innolight's revenue from 2026 to 2028, driven primarily by silicon photonics module shipment growth and market expansion. More critically, its net profit forecasts for 2026 and 2027 exceed Bloomberg consensus estimates by 25% and 42%, respectively, a level of upside surprise rarely seen in major investment bank research.

Goldman analyst Verena Jeng outlined four key pillars supporting this aggressive outlook. First, the company's leading position in silicon photonics modules, the core path for upgrading optical modules from 800G to 1.6T and even 3.2T, where ZJ Innolight holds a distinct first-mover advantage. Goldman expects silicon photonics penetration to reach 60%, 80%, and 100% in 800G, 1.6T, and 3.2T products, respectively, by 2026. Second, accelerated mass production of 1.6T and higher solutions, with fewer than three global manufacturers capable of volume-producing 1.6T silicon photonics modules, and ZJ Innolight boasting the largest capacity and most stable delivery record. Third, a stable supply chain and diversified production bases in Thailand, Mexico, and other locations that effectively mitigate geopolitical risks. Fourth, manageable CPO competition, as despite market concerns that co-packaged optics could disrupt the traditional pluggable optical module business model, Goldman believes ZJ Innolight's deep technology reserves in CPO place it in a strong defensive position.

Goldman also highlighted two critical catalysts: the migration to next-generation AI platforms driving optical module spec upgrades, and incremental revenue from NPO solutions. Under these assumptions, the company's net profit is projected to reach 40.4 billion, 86.9 billion, and 137.1 billion yuan in 2026, 2027, and 2028, respectively. Based on 2025 revenue figures from LightCounting and CIC, ZJ Innolight is already the world's largest optical interconnect solutions provider with a 21.2% market share.

Goldman is not alone in its bullish stance. Over the past six months, multiple international investment banks have initiated or maintained coverage on ZJ Innolight, with ratings uniformly pointing to Buy or Overweight, though with varying earnings estimates and price targets. Forecasts for 2026 net profit range from 33.2 billion to 40.4 billion yuan, with the core divergence centered on the magnitude of ASP declines and share pricing changes. However, there is no disagreement on one core thesis: ZJ Innolight is the most certain beneficiary of AI computing infrastructure buildout, and its dominant position in high-speed optical modules is irreplaceable in the near term. The real debate is not about quality, but about valuation.

Sector Momentum Continues to Strengthen

Placing ZJ Innolight within the broader industry context, its surge is an inevitable outcome of the AI wave. According to TrendForce's August forecast, combined capital expenditure by the world's nine largest cloud providers (Google, Amazon, Meta, Microsoft, Oracle, ByteDance, Tencent, Alibaba, and Baidu) will surpass $886.7 billion in 2026, up nearly 90% year-over-year, with the majority directed toward AI data center construction. As Nvidia GPUs remain in short supply, the data transmission requirements between GPUs have elevated the optical module market by an order of magnitude.

LightCounting's latest projections indicate the global high-speed optical module market will exceed $18 billion in 2026 and surpass $40 billion by 2028, representing a compound annual growth rate of over 50%. Products at 800G and above will increase from less than 40% of the market in 2025 to over 70% by 2028, a growth trajectory that is exceptionally rare in technology hardware. ZJ Innolight occupies precisely the segment with the most concentrated incremental gains, as 1.6T modules carry prices several times higher than 800G, with superior margins and a more favorable competitive landscape.

Guotai Haitong Securities notes that 800G modules have entered large-scale deployment, with 1.6T accelerating, while new technology advances in silicon photonics and CPO are driving optical module equipment demand into a dual-cycle of capacity expansion and upgrades. The global optical module market is expected to grow from 126.7 billion yuan in 2024 to 295.4 billion yuan by 2029, a compound growth rate of 18.5%. Upstream chip supply continues to improve, with DSP chip capacity releases from Broadcom and Marvell gradually easing material bottlenecks. On the demand side, beyond North American cloud vendors, domestic Chinese internet giants like ByteDance and Alibaba are accelerating AI computing deployment, with synchronized domestic and overseas demand providing exceptional order visibility.

On the competitive front, while domestic peers such as Eoptolink, Tianfu Communication, and Accelink are growing rapidly, the gap with ZJ Innolight at 1.6T and above is widening rather than narrowing, manifesting in yield rates, production scale, customer qualifications, and depth of joint development. The head effect is becoming increasingly pronounced across the optical module industry, with ZJ Innolight's moat as the sector leader continuing to expand.

Potential Risks Cannot Be Ignored

Any company with a market value of one trillion yuan warrants a measure of caution amid the applause. Research reports from Goldman Sachs, Morgan Stanley, UBS, and other institutions converge on several core risks. CPO technology substitution risk remains the market's long-standing focus, with Goldman listing it among its three core debate points. Morgan Stanley believes concerns over CPO's disruptive impact are already fully reflected in valuations, estimating CPO dilution of optical module demand at only approximately 3% in 2026 and 11% in 2027, with large-scale deployment unlikely before 2027-2028. JPMorgan similarly sees CPO scale adoption only post-2027. However, Hua Nan Securities raises a different concern: if CPO becomes dominated by system manufacturers, it could suppress module makers' long-term valuation multiples.

Industry competition and share changes also feature prominently. Both Goldman and Morgan Stanley identify intensifying competition leading to market share normalization as a risk factor. While domestic competitors still lag at 1.6T and above, whether this gap continues to narrow remains a variable under constant monitoring. AI capital expenditure sustainability is a risk highlighted by UBS. JPMorgan, citing Bloomberg consensus forecasts, warns that combined capital expenditure growth for Amazon, Google, Microsoft, Meta, and Apple could decelerate from 100% in 2026 to 22% in 2027 and further to 7% in 2028, which would directly impact optical module demand. UBS, however, emphasizes that interconnect remains a bottleneck in AI infrastructure, and even with slowing CSP capex growth, the imperative for optical module upgrades remains strong.

Supply chain constraints are also on the radar. Goldman identifies upstream component shortages as a factor. DSP chips represent the largest BOM cost item in optical modules, with 1.6T module DSP value approaching $100, accounting for 30-40% of unit cost. The high-end DSP market is a duopoly dominated by Broadcom and Marvell with a combined share exceeding 90%, and Broadcom's 1.6T DSP delivery lead time extends to approximately one year. Advanced process DSPs rely heavily on TSMC's 3nm and CoWoS packaging capacity, which is severely crowded by GPU customers. In EML lasers, Mitsubishi Electric, Sumitomo, and Lumentum dominate, with Lumentum's high-end EML order book extending beyond 2027. ZJ Innolight acknowledged in its August institutional communications that DSP, optical chip, and PCB material supply remains tight, with this constraint expected to persist through this year.

Overall, institutional risk assessments on ZJ Innolight share a highly consistent framework: geopolitics represents the largest external uncertainty, CPO the most significant technology route variable, and competition and supply chain the internal variables under continuous monitoring. Disagreements center on probability assessments and discount levels applied to these risks. UBS's 1,500 yuan price target, below market consensus, reflects a higher discount applied to potential share changes in the 3.2T era, while Goldman's more aggressive target is predicated on more optimistic assumptions regarding market share retention. These divergent views themselves form the basis for ongoing market debate.

The AI tide surges forward, from large model iteration to application deployment, from training to inference, with computing power demand showing no ceiling. ZJ Innolight is the most critical picks-and-shovels player along this long, snow-covered slope. Goldman Sachs, Morgan Stanley, JPMorgan, Citi, and UBS have cast their votes through research reports, while A-share capital has voted with a trillion-yuan market value. Investment is never a set-and-forget endeavor; industries evolve, technology advances, and competition intensifies. But at this juncture, ZJ Innolight has earned the market's full confidence through its clear growth trajectory and collective endorsement from top-tier institutions. What remains to be seen is whether it can continue to deliver on this trust.