That's only if you put your money in a the start, put 100$ in every week inflation adjusted and you will have made money over the last 10 years.

PS: I made over 40% last year just buying mutual funds in my 401K. Look for the worst 40 years to dollar cost average inflation adjusted and your return is going surprise you.

Measuring stock performance by looking at one of the biggest bubbles in recent years and comparing it to one of the biggest crashes in recent years is a little bit dishonest. Given that this article is writing to young people interested explaining how they should invest if they're interested in their financial situation 30 years from now, a 30-year outlook is more reasonable.

Many would argue that ten years isn't nearly long term enough. 40 years perhaps.