From the desk of Brian Gilmartin of fundatmentalis.com:
The 10-year return for the SP 500 from January 1, 2000 to December 31, 2009 was the worst 10-year return for the SP 500 EVER, even worse than the Great Depression.
The actual return during that period was a -1.38%, that is a cumulative 10-year return.
Even including 2013’s 32% return for the SP 500, the average 14-year return for the SP 500 since the March, 2000 peak is between 3% – 4%.
The average return for any 10-year period of the SP 500 is roughly 8.89%.
The point is that the last 14 year average return for the SP 500 is still well below the long-term average.