Applied Optoelectronics (AAOI) is back in focus after its CEO announced the first large-scale shipment of 800G products to a major hyperscale customer, directly tied to rising AI datacenter demand.

Despite the latest AI datacenter win, Applied Optoelectronics’ share price has been volatile, with the stock down 31.53% over the past month and 20.37% over the past quarter, yet still showing a 202.83% year to date share price return and very large multi year total shareholder returns. This suggests that momentum has cooled recently after an extended surge.

If this AI driven story has your attention, it can be useful to see what other AI infrastructure suppliers are doing right now, starting with the 52 AI infrastructure stocks

Applied Optoelectronics now has a headline AI customer and very strong recent share price gains, yet the stock also swung sharply lower in recent weeks. Does that mix of growth story and volatility still add up at today’s valuation?

Most Popular Narrative: 54% Overvalued

Applied Optoelectronics last closed at $119.92, while the most followed narrative pegs fair value at $78. That gap is at the heart of the current debate around the stock.

Bull case: AAOI is becoming one of the more strategically relevant optical interconnect suppliers in AI infrastructure. It now has proof points that matter: hyperscaler qualification, production-scale 800G demand, a first major 1.6T order, and a credible U.S. manufacturing expansion. If it delivers on management’s 2026 plan, today’s valuation may still be justified or even exceeded.

Want to see what is baked into that $78 fair value for Applied Optoelectronics? The narrative leans heavily on rapid revenue expansion, a sharp profitability shift, and a richer future earnings multiple. Curious which exact growth and margin assumptions sit under those headline targets and how sensitive the valuation is to them? The full narrative lays out the numbers behind that view of the stock.

Result: Fair Value of $78 (OVERVALUED)

However, the Applied Optoelectronics story can unravel quickly if large hyperscale customers slow orders, or if the planned capacity ramp runs into execution problems.

Another View: What Multiples Say About Applied Optoelectronics

While the most followed narrative for Applied Optoelectronics points to a $78 fair value, the current P/S ratio of 19x tells a different story. That level screens as expensive compared with peers at 7x, the wider US Communications industry at 2.2x, and even a fair ratio of 44.7x that suggests the market could still shift meaningfully from here. Is this pricing a cushion or a warning label for new capital?

Next Steps

Does this mix of optimism and concern around Applied Optoelectronics reflect your own view, or something different? Take a closer look at the underlying data and recent developments, weigh both the warning signs and potential upsides, and then check the 1 key reward and 3 important warning signs.

Looking for more investment ideas beyond Applied Optoelectronics?

If Applied Optoelectronics has sharpened your focus on opportunities, now is the time to scan wider and spot other stocks telling compelling stories across the market.

• Target resilient growers with healthy balance sheets by reviewing companies in the solid balance sheet and fundamentals stocks screener (47 results).
• Hunt for potential mispriced opportunities by checking the 44 high quality undervalued stocks that currently stand out on key fundamentals.
• Prioritize stability and income by assessing companies in the 9 dividend fortresses that offer meaningful yield alongside robust financial profiles.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.