The idea here is that younger people with longer investment horizons can take on more risk and ride out inevitable market volatility. (moneysense.ca)
Even if this is not entirely accurate due to simplifying assumptions, that period is a far cry from the much longer investment horizon mentioned above. (alpholio.com)
So market returns over a small number of years can experience enormous swings, but average annual returns appear much more stable when we examine a very long investment horizon. (hussmanfunds.com)