On August 6, Applied Optoelectronics fell 6.62% in after-hours trading, trading at 135.49 USD/share, with turnover of approximately 51.82 million USD. The stock had already declined about 6.46% during the regular session as investors locked in gains ahead of the earnings release scheduled for after the close.

The after-hours drop extended the intraday selloff following the company's quarterly earnings publication. In prior sessions, the stock had surged dramatically — rising as much as 21% intraday on August 5 — fueled by reports that the U.S. is drafting a ban on imports of new Chinese data center components, including optical transceivers. As a domestic fiber-optic networking products supplier serving data center operators, Applied Optoelectronics was among the primary beneficiaries of the policy catalyst. Market consensus had expected quarterly revenue of approximately $190 million, representing 80.03% year-over-year growth. The sharp pullback reflects broad profit-taking after the substantial run-up, with the communication equipment sector also under pressure as peer Lumentum declined 0.96% on the same day.

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