Google CEO Larry Page tried to put a positive spin on his company's poor third-quarter financial results, which were released prematurely Thursday and triggered a panicked stock sell-off before trading was abruptly halted.

During a conference call with financial analysts, Page said the quarter had been a strong one and that Google has big opportunities for growth, especially in mobile advertising.

"As we transition from one screen to multiscreens, Google has enormous opportunities to innovate and drive ever higher monetization," Page said, referring to the popularity of smartphones and tablets.

To back up his claim, Page said that Google's annual run rate of mobile-related revenue is US$8 billion, mostly composed of ad sales but also containing revenue from the purchase of content, like books, movies and music, and of applications on the company's Play store.

"That's quite a business," he said.

The seed for this was planted back in 2005 when Google launched its Android mobile OS, he said, adding that there are now half-a-billion Android devices worldwide, and that 1.3 million are activated daily.

Still, it was a strange, convulsiveday for Google, whose printing service provider RR Donnelly mistakenly released the company's financial report hours early, delivering bad news to investors in the middle of the trading day.

Google's revenue grew, but earnings dropped and the company missed Wall Street expectations, unleashing a massive sale of the stock. When trading on the Nasdaq was halted shortly before 1 p.m. Eastern Time, its shares were trading down a little more than 9 per cent.

The stock resumed trading shortly before the close of market and ended the day at $695.00, down 8 per cent.

Google took in revenue of $14.10bn for the quarter, ended Sept. 30, up 45 per cent year on year. Subtracting commissions and fees paid to advertising partners, revenue was $11.3bn, below the consensus expectation of $11.86bn from financial analysts polled by Thomson Financial.

Net income was $2.18bn, or $6.53 per share, down from $2.73bn, or $8.33 per share, in 2011's third quarter. On a pro forma basis, which excludes certain items, net income was $3.01bn, or $9.03 per share, well below the consensus estimate of $10.65.

Google was affected by a combination of heightened costs and weaker ad prices.

Paid clicks, or the clicks on search ads that advertisers pay for, rose 33 per cent year on year. However, the cost of paid clicks, or the money Google charges when someone clicks on an ad, fell 15 per cent.

Costs that included data center operating expenses, amortization of intangible assets, content acquisition costs and credit card processing charges rose to $3.78bn, or 27 per cent of revenue, compared to $1.17bn in the third quarter of 2011.

In addition, the commissions and fees Google pays to partners, known as Traffic Acquisition Costs (TAC), increased to $2.77bn from $2.21bn.

Stock-based compensation expenses also increased year on year, to $715m from $571m.

Meanwhile, Motorola Mobility, whose $12.5bn acquisition Google closed in May, had an operating loss of $527m on revenue of $2.58bn. In addition, restructuring and related charges recorded in the Motorola business were $349m, and the related tax benefits were $76m.

Other Google executives joined Page in singing a happy tune, including CFO Patrick Pichette, who said he was pleased with the business' "growth trajectory." Pichette said Google's numbers were also adversely affected by "currency headwinds."

Nikesh Arora, Google's chief business officer, reiterated the mobile opportunity, and said the company's enterprise software business, including Google Apps, "continued to thrive" during the quarter.

Google is hard at work at improving its mobile advertising technology, Page said, in part to make it much easier than it is today for marketers to manage their mobile ad campaigns.

Google ended the quarter with $45.7bn in cash, cash equivalents and short-term marketable securities.