Google Inc’s quarterly results fell well short of Wall Street’s expectations after its core advertising business slowed, stunning investors accustomed to consistently rapid growth from the internet giant and wiping more than nine per cent off its market value.

The disappointing numbers on Thursday came hours ahead of schedule in a rare instance of premature filing. Google blamed the misfire on an unauthorized filing by its financial printers, RR Donnelley & Sons Co, and later confirmed the numbers’ accuracy.

The earnings report, which had not been expected until after the market close, revealed a weakening in Google’s core internet advertising business and persistent losses at its recently acquired cellphone business, Motorola Mobility.

Shares of Google, the world’s No. 1 internet search engine, finished Thursday’s regular trading session down eight per cent at $695 after a brief trading halt. Some analysts said the inadvertent results release spurred confusion and exacerbated its stock price decline.

Google executives said that the company’svarious businesses continued to benefit from healthy growth and that Google was well-positioned to capitalise on consumer’s increasing use of mobile devices.

Chief executive Larry Page, speaking on his first earnings call since an unspecified voice ailment sidelined him from public speaking in June, said that Google’s mobile business was now generating revenue at an annualised run rate of $8 billion.

Page acknowledged that mobile ad rates were below the rates that Google garners for ads that appear on its standard website. But he said the variety of Web-connecteddevices used by consumers is creating “a huge new universe of opportunities for advertisers”.

“We’re uniquely positioned to get through that transition and to really profit from it,” Page said, citing Google’s Android mobile software, the world’s top operating system for smartphones by market share.

Google, which has been struggling to turn around a Motorola Mobility hardware business it bought for $12.5 billion, reported a 20 per cent dive in net income to $2.18 billion. Excluding certain items, it earned $9.03 a share, vastly underperforming the $10.65 analysts had expected, on average.

“We have been saying this thing was ripe for a pullback. It’s not like they’re Google not being Google, but you still have some major issues,” said BCG analyst Colin Gillis.

“Click prices declined for the fourth consecutive quarter after rising for eight consecutive quarters before then. That’s a negative. This is the mobile problem.”

“The other bit is the Motorola millstone had been ignored by the market, and − boom − now you’ve got weak revenue from Motorola.

“When you acquire a business and you’re about to whack all kinds of people and close offices, you know what happens to the employees? They take their eye off the ball. Sales are down,” Gillis explained.

Net revenue growth at Google’s main internet business increased 17 per cent year-over-year, the first time growth in that business has fallen below 20 per cent since 2009.

The decline in Google’s shares come after a three-month run-up in its stock, which reached an all-time high of $774.38 earlier this month. (Reuters)

Google reported net revenue – excluding traffic acquisition costs – of $11.3 billion for the third quarter, below Wall Street’s expectations for about $11.9 billion.

For the fourth consecutive quarter, the company reported a decline in average cost-per-click (CPC), a critical metric that denotes the price advertisers pay Google.

Average CPC declined 15 per cent from a year ago and three per cent from the second quarter of this year. Analysts say that Google, like many of its peers in the Internet industry, has been struggling to adapt to the rapid consumer uptake in mobile devices. Advertisers pay far less for ads on smartphones and tablets than for similar ads on desktop computers.

“The core business seems to have slowed down pretty significantly, which is shocking,” said B. Riley analyst Sameet Sinha. “The only conclusion I can look at is, search is happening more and more outside of Google, meaning people are searching more through apps than through Google search.”

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