Applied Optoelectronics (AAOI) is back in focus after a busy run of news, including fresh 800G transceiver orders from a hyperscale customer, a Mediacom broadband upgrade partnership, and a Texas grant for U.S. manufacturing expansion.

That backdrop of Mediacom broadband work, fresh 800G orders and the Texas grant has coincided with a sharp shift in sentiment, with the stock’s 30 day share price return of 25.02% feeding into a very large 1 year total shareholder return and double digit multiple gains over 3 and 5 years. This suggests momentum has been building rather than fading.

If you are interested in how other AI infrastructure plays are trading around similar themes, now is a good time to scan 39 AI infrastructure stocks.

With AAOI shares at $188.28, trading above an average analyst target of $151.30 and with a very high 1 year total return, the question is whether there is still additional upside or if the market is already fully valuing expectations for future growth.

Most Popular Narrative: 141.4% Overvalued

At a last close of $188.28 versus a narrative fair value of $78.00, the current price sits well above what the most followed valuation framework implies.

Applied Optoelectronics is no longer just a small-cap optical component company. It has become an increasingly relevant supplier of 800G and 1.6T optical transceivers used inside hyperscale AI datacenters, with management guiding to more than US$1 billion of 2026 revenue and more than US$120 million of non-GAAP operating profit after delivering US$455.7 million of revenue in 2025. That is an unusually sharp revenue inflection and explains why the stock has rerated so aggressively.

Want to see what kind of revenue ramp and margin shift sits behind that valuation gap, according to HedgeY, and how hyperscaler orders feed into that fair value path?

Result: Fair Value of $78 (OVERVALUED)

However, this story can break if a major hyperscaler cuts orders or if the ramp to management’s 2026 revenue and profit targets encounters execution snags.

Another Angle: Multiples Paint a Different Picture

While the user narrative flags AAOI as 141.4% above its fair value, the simple P/S comparison is more nuanced. The stock trades at 29.8x sales, which is expensive next to peers at 7.8x and the wider US Communications group at 2.4x, yet still below a fair ratio of 93.6x. That gap suggests investors are paying up, but not to the fullest extent implied by the regression model. This raises a question: is the risk that expectations cool, or that the market edges closer to that higher fair ratio over time?

Next Steps

The mix of excitement and caution around AAOI is clear, so consider acting promptly, reviewing the underlying data, and forming your own stance by checking 1 key reward and 3 important warning signs.

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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.