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Worry that tech giants may slow spending on optical hardware sent Applied Optoelectronics (NASDAQ:AAOI) down 23.6% this week, extending a drop that leaves shares down 64.2% (as of the close on Thursday, Oct. 15) from their 52-week high.
Applied Optoelectronics stock changed hands at $83.73 as of the close on Thursday, Oct. 15, down 23.6% from Friday, Oct. 9's close through Thursday, Oct. 15's close. Across those five sessions, the S&P 500 (SNPINDEX:^GSPC) fell 0.9%, the Nasdaq-100 dropped 3.1%, and the Technology Select Sector (NYSEMKT:XLK) lost 4.8%.
Broadcom CEO Hock Tan warned that capital access and funding constraints could slow the build-out of artificial intelligence infrastructure. That warning triggered a sell-off across photonics component makers, hitting Applied Optoelectronics harder than peers like Lumentum Holdings (NASDAQ:LITE) and Coherent (NYSE:COHR). The stock had reached a 52-week high of $233.67 before falling, and it remains down 64.2% (as of the close on Thursday, Oct. 15) from that peak. The drop follows the company's completion of a $600 million at-the-market equity offering, which raised liquidity to expand manufacturing capacity for 800G optical transceivers but also contributed to shareholder dilution. B. Riley also lowered its price target on the stock to $92 from $109.
Applied Optoelectronics manufactures optical networking components, like transceivers and lasers, for internet data centers and cable television operators. The company's higher-speed 800G optical transceivers are designed to handle high-density data traffic inside AI server clusters. However, customer concentration remains a vulnerability, with its top 10 customers accounting for 99% of total revenue.
In its last reported quarter, which ended June 30, 2026, revenue jumped 86.4% year over year to $191.9 million, driven by data center demand, while the company posted a $22.8 million net loss. Management has been expanding manufacturing facilities in Texas to meet projected demand for next-generation optical modules. This week's optical sector sell-off sharpens concerns that funding constraints among major cloud customers could slow Applied Optoelectronics' rapid capacity expansion.
The stock trades at a price-to-sales (P/S) ratio of 11.9, a valuation that reflects high growth expectations for its high-speed optical components. With cash and short-term investments totaling $509 million as of June 30, 2026, and total debt of $93 million, the company has sufficient cash to fund capital expenditure plans. However, ongoing GAAP losses leave the multiple vulnerable if revenue growth slows.
Investors will get a clearer view of demand trends when Applied Optoelectronics reports its third-quarter 2026 financial results on Nov. 5, 2026. The key metric to watch will be sequential growth in 800G product shipments, along with progress on gross margin expansion. If capital spending by major data center operators slows, the company's heavy fixed-cost manufacturing expansion could weigh on profitability.
The sharp sell-off in Applied Optoelectronics stock has surely drawn the attention of investors who have been waiting for a pullback in the AI stock. Given the company's significant customer concentration, its failure to generate profits, and valid concerns that a slowdown in AI infrastructure funding could hamper its growth, Applied Optoelectronics is a stock investors must recognize as carrying a fair degree of risk.
Potential investors will want to review the company's report when it announces Q3 2026 financial results. Still, for now, Applied Optoelectronics remains a speculative AI stock. Fortunately, investors have plenty of other AI stocks with robust growth potential and lower degrees of risk that they can consider right now.
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Scott Levine has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Broadcom, Coherent, and Lumentum. The Motley Fool has a disclosure policy.
Why Applied Optoelectronics Stock Plummeted This Week was originally published by The Motley Fool
