Back when the Cambridge Analytica scandal was still in high gear, and the #deletefacebook movement along with it, Facebook's shareholders did something they hadn't really done for years: they sold their stock. They sold enough stock to actually drop Facebook's share price a bit, for a couple of weeks... until Facebook CEO Mark Zuckerberg was finished with his command performance testimony before Congress, and it was rapidly becoming clear that Congress had no intention of doing anything much to reign Facebook in.
None of Facebook's other scandals since then have had a much impact. FB shareholders, having learned that FB's actions had virtually no potential of negative consequences for the firm, have steadfastly driven FC's share price upwards ever since. The only other downwards blip on this general upwards trend was March of this year, when everyones' share prices were crashing.
That ended at the end of last week, when EU-UK giant
Unilever announced that they were joining an advertising boycott of Facebook over their policies (or, more accurately, their lack of same) regarding hate-filled political advertising. Unilever's announcement that they were joining this boycott was probably the first time that most people had even heard that the boycott was happening, but once the world's attention was drawn to the boycott, and people had educated themselves on exactly who Unilever even were, the effect on FB's share price was immediate and dramatic: it dropped.