Citron Shorts Applied Optoelectronics, Calls Valuation Detached From Fundamentals And Flags Downside Risks

• Citron emphasized concerns around customer concentration, capital intensity, and execution risks in scaling infrastructure.
• The firm compared Applied Optoelectronics to Corning and Lumentum, noting that the peers had strong financial demand drivers.
• Citron said that the stock is priced as if it can deliver Nvidia-level profits, even though its margins are far lower. 

Citron Research on Friday announced that it is short Applied Optoelectronics Inc. (AAOI), warning that the fiber-optics supplier’s recent surge in market value is disconnected from its fundamentals and unlikely to hold if sentiment cools.

In a note on the X platform, the short seller criticized the stock’s rapid climb from roughly $85 to about $140 within two weeks.

Valuation Driven By Speculation

Citron Research said Applied Optoelectronics’ nearly $3.5 billion jump in market capitalization was driven by speculative momentum tied to a recent press release rather than durable earnings strength or long-term demand visibility.

On April 2, the company, which produces optical networking equipment, received a $71 million contract to supply 800G single-mode data center transceivers to a large cloud computing customer whose name was not disclosed. The same client had placed an initial order worth over $53 million in March.

Applied Optoelectronics’ stock traded over 11% higher on Friday mid-morning. 

Sector Positioning Debate

In its commentary, Citron drew a clear distinction between players in the AI infrastructure supply chain. The firm expressed a preference for Corning Inc. (GLW), citing its broad exposure to fiber demand across hyperscalers, and supported Lumentum Holdings Inc. (LITE) as a stronger competitor due to its established role as a supplier to Nvidia Corp. (NVDA).

The firm also questioned Applied Optoelectronics’ customer concentration risk, citing its reliance on large cloud and telecom buyers, including Oracle-linked infrastructure projects. 

The firm compared this with what it described as stronger financial demand drivers among peers, noting concerns about capital intensity and execution risk in the broader data center buildout cycle.

Citron claimed that the stock trades at levels that assume Nvidia-like profitability despite significantly lower gross margins, limited pricing power, and a smaller customer base. 

What Are Retail Traders Saying?

On Stocktwits, retail sentiment around the stock jumped to ‘bullish’ from ‘neutral’ territory the previous day, amid ‘high’ message volume levels. 

A Stocktwits user said the stock holds ‘insane strength’ despite the report. 

AAOI stock has gained over 321% year-to-date. 

Also See: Dan Ives Dismisses Michael Burry’s Bearish Palantir Take: Retail Says ‘Charge Burry For Manipulation’

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