Facebook Stock Plummets 6 Percent After It Reported Fourth-Quarter Earnings, Wiping Out $30 Billion In Market Value

JustAnotherOldGuy writes: Facebook issued a disappointing quarterly report, sending its stock price down by 6%, reports CNBC. In the report, Facebook reported a 51% rise in expenses and "warned of advertising headwinds related to privacy and regulatory changes on the horizon, leading to slowing growth in the U.S. Facebook said privacy improvements on Apple's iPhones and Google's Android software could hurt its ability to target advertising."
Here are the key numbers from Facebook's fourth-quarter earnings report, per CNBC:

Earnings (EPS): $2.56 vs. $2.53 per share forecast by Refinitiv.
Revenue: $21.08 billion vs. $20.89 billion forecast by Refinitiv.
Daily active users (DAUs): 1.66 billion vs. 1.65 billion forecast by FactSet.
Monthly active users (DAUs): 2.5 billion vs. 2.5 billion forecast by FactSet.
Average revenue per user (ARPU): $8.52 vs. $8.38 forecast by FactSet.