"Not quite such a substantive returns then" 22% (per annum) is a pretty substantive return for an asset class across a sample of 406 investments over over a 4

"Not quite such a substantive returns then" 22% (per annum) is a pretty substantive return for an asset class across a sample of 406 investments over over a 4 year period. As other posters have commented - it would be interesting to see data over a 2008-2010 period to see if it has changed adversely since then.