There is something to this. FB has underperformed the S&P500 recently.
Over the 1 year mark, the S&P is up 31%, vs less than 13% for FB. It has underperformed over 6 months as well: less than 7% for FB compared to 9% for the market.
It's only until you look back two years and more that FB has outperformed.
Most of this is because of a roughly 15% decline in FB stock since mid-September.
