A diversified portfolio (65% stocks, 15% bonds, 20% real estate) is predicted to experience daily changes of less than 2%, with most changes under 1%.
"but now look at what happens to those ups and downs when you combine these three index funds with 65% of your money in stocks 15% of it in bonds and then 20% in real estate you see less than 2% daily changes and most of these are under a percent one way or the other"