Beijing, Chine (BBN)-New York listed shares of China's biggest online search engine, Baidu, fell nearly 10% in after-hours trading after its quarterly revenue came in below expectations.
Baidu's fourth quarter revenue was 14.05bn yuan ($2.26bn; £1.5bn), missing market forecasts of 14.12bn yuan, reports BBC.
The tech giant also forecast revenue for the current quarter well below analyst expectations.
The revenue miss was due to more users switching from PCs to mobile devices.
That results in less space for different forms of online advertising for the company.
MOBILE GROWTH
Search revenue from mobile surpassed that from PCs for the first time in December, said chief executive Robin Li in a statement on Wednesday.
"For the upcoming quarter, our guidance reflects the combined impact of both the late timing of Chinese New Year this year and mobile's growing traffic contribution, which monetises at a rate lower than that of PC," he said.
"We expect mobile's monetisation rate to trend up throughout the year."
The company, which is often referred to as China's Google, expects revenue of up to $13.07bn yuan in the January to March period, compared to a market forecast of 13.62bn yuan.
Baidu has been facing stiff competition in the mobile space from the likes of e-commerce giants Alibaba and Tencent, while rivals Qihoo 360 and Sogou are growing fast in online search.
But the market leader has been investing heavily in marketing and content to keep up with rivals on mobile devices.
"2015 will be an important year for Baidu as we execute on our plan and invest for the next phase of mobile growth," Mr Li added.
BBN/SK/AD-12Feb15-12:10pm (BST)