JPMorgan analyst Doug Anmuth says he's increasingly confident in his above-consensus 2017/2018 revenue estimates for Facebook following an analysis of the company's product and advertising changes.

Facebook's monthly active users grew last year at the fastest rate since the company went public in 2012 while Instagram added its most recent 100M users at its fastest pace in history, Anmuth tells investors in a research note.

Facebook's product changes are working to drive engagement at scale, the analyst argues. Facebook remains Anmuth's favorite large-cap Internet idea with an Overweight rating and $170 price target. The social media giant closed yesterday up 42c to $137.72.