What happened

Shares of Baidu Inc. (NASDAQ:BIDU) fell 9.5% on Friday after the Chinese internet search leader announced that its chief operating officer, Qi Lu, is stepping down from his post.

More specifically, Lu says he will no longer serve as COO of Baidu starting in July 2018 "due to personal and family reasons." But he will continue to serve as the vice chairman of Baidu's board of directors.

Stock market data and charts on a colorful LED display


So what

Recall that Baidu hired Lu early last year to much fanfare from Microsoft, where he worked as global executive vice president of the American tech giant's applications and services group. In particular, Lu was known as one of the industry's leading experts on artificial intelligence -- an area where Baidu was keen to strengthen its position -- and had since broadly taken over daily operational management at Baidu.

"I am highly optimistic on Baidu's future and will continue to support Baidu, while spending more time with my family in the U.S.," Lu explained. "For my next steps, I plan to work in research and investment areas, to help advance our shared mission to make a complex world simpler through technology."

Baidu CEO Robin Li praised Lu for his work at the company, thanking him for "many positive changes at Baidu" since he joined the company.

"With Baidu's strategy to transform into an AI-first company firmly in place," Li added, "we are well positioned to continue the momentum that we have built in the past year."

Now what

To be sure, it's hard to blame investors for reacting negatively to Lu's decision to step down from his significant managerial duties. But however talented Lu might be, Baidu is about more than just a single employee. And I think investors would do well to focus on its underlying fundamentals, which remain impressive, as well as the fact that -- as Li noted -- its AI-first transformation is already well under way. Viewed through that lens, patient Baidu shareholders should have little reason to worry.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.