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So why did the price tank all of a sudden and then came back to normal? What does it mean?

  • 2
    Related: What happened to Home Depot's Stock in 1988?, which turned out to be an entire year of bad data.
    – Ben Miller
    Commented Aug 24, 2020 at 21:35
  • 1
    What/where is the source of your screentshot?
    – BruceWayne
    Commented Aug 25, 2020 at 15:08
  • @BruceWayne google Commented Aug 25, 2020 at 20:02
  • @yoozer8 Marked as dupe, since OP accepted a similar answer. Thanks for finding that!
    – jpaugh
    Commented Aug 26, 2020 at 13:59

2 Answers 2


It means a bad data point. Look at other quote providers and you won't see that data point.

You can also see that the "low" for the day is higher than the bad data point.


Sharp dips like that are almost always bad data. Most of the time that can be verified by looking at Time & Sales.

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