The Facebook share plummeted by five percent yesterday when Facebook and other social media giant's services were down.
For Mark Zuckerberg, this meant that his fortune shrank by 50 billion in one fell swoop.
Today, the stock scratched and rose a few percent, so in the end the bill for the crash ends up "only" at 30 billion for the Facebook founder.
- It's miscalculation money for a guy like Mark Zuckerberg, says SVT's tech correspondent Alexander Norén.
30 billion is nothing compared to how much the whistleblower who is testifying in Congress today can cost Facebook, says Alexander Norén.
Hear SVT's tech correspondent about how expensive the whistleblower's leaks risk being for Zuckerberg in the clip.