The following video is from a very special Halloween edition of Investor Beat, in which host Chris Hill and Motley Fool analysts Tim Hanson and Matt Koppenheffer dissect the hardest-hitting investing stories of the day.

Facebook's (META -10.56%) third-quarter results looked impressive on paper. Immediately after reporting last night, the stock soared more than 15%. But comments on the analyst conference call by Facebook's finance chief sent the stock in the other direction. In today's spooky lead story on Investor Beat, Tim and Matt discuss whether a decrease in daily use among younger teenagers is a real problem for Facebook and what growth levers the company can still pull from here.