Facebook has reached a 61 percent increase in revenue for the fiscal second quarter, beating the projections and financial targets set by Wall Street.

The operating margin of the company has expanded its revenue to about 48 percent, an improvement from 2013's 31 percent. Overall, Facebook was able to have a profit of US$2.91 billion, beating the US$2.81 billion expectation, according to Thomson Reuters I/B/E/S analysts' poll.

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The rapid profit increase has set a record-high in stocks trade and the majority of the profit came from mobile advertising.

The revenue from the mobile advertising grew 151 percent annually, accounting for more than 61 percent of Facebook's overall profit.

The social network that there was a definite increase in interest from the users and advertisers for the second quarter. At the same time, there was an expansion with the company's profit margins as well.

Facebook accounts for more than 1.5 million advert customers to date and the ads plugin of the site continuously grows across other regions, according to Facebook COO Sheryl Sandberg.

"We're seeing our existing advertisers spend more and we're seeing new people come on to the platform," Sandberg said.

The company, presently valued at US$190 billion, had bid up shares from the investors increasing the shares by 5 percent, equivalent to US$73.13 per share.

"It might be more expensive from a market cap perspective, but I don't think anyone was expecting this level of profitability," said analyst Ronald Josey, of JMP Securities.

Josey also said Facebook does not really need to rush in launching new products in the market and they're taking a slow approach. The strategy, however, did not affect investors.

"There's really no rush to add... because their core business is doing well," he said.

Facebook's net income was posted at US$791 million at present, compared to the US$333 million for the last year's second quarter. 

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