Summary
The only times the U.S. stock market has been down on a 10 year basis were following the Great Depression and Great Financial Crisis. Over the past 80 years or so, there hasn’t been a single 10 year window when gross domestic product in America was negative.
The only way to guarantee you’ll fall behind is by not investing in anything. We’re always one gigantic financial crisis away from a painful decade or so. There is no such thing as always or never in the financial markets. The content speaks only as of the date indicated.