Sometimes those wild "market shifts" are a little more common than we realize. #TheMoreYouKnow

Since 1928, the Dow Jones has increased more than 10% in a single day eight times, declined more than 10% in a single day four times, and gone either up or down more than 5% in a single day 136 times.

Source:
https://www.fool.com/investing/general/2013/02/05/100-startling-facts-about-the-economy.aspx