Facebook's forecast of a slowdown isn't a reason to panic according to Wall Street

Facebook shares tumbled after it reported its Q3 results on Thursday as the company warned of increased spending next year and a slowdown in revenue growth.

But Wall Street analysts who cover the company aren't panicking.

While some analysts adjusted their targets and revenue expectations to account for Facebook's forecast of a "meaningful" slowdown in revenue growth rates next year, most remained confident in Facebook's prospects.

None of the 11 analysts surveyed by Business Insider lowered their recommendations for Facebook, with the company's strong position in the online ad business and its opportunities in video viewed as offsetting any short-term impact to profit margins or revenue.

Here are some of the main reasons Wall Street's Facebook analysts are bullish: