For what's it worth ASB have annual TSR for the last few years as
2010 -4%
2011 +8%
2012 -21%
2013. +60%
2014 -14%
2015. -14%
Current year is negative
Based on WHS reporting years and with dividends reinvested.
So 1 boomer year and 4 bad years in the last 6. The boomer year doesn't offset the bad years.
But yes timing purchases and buy at real low points and holding probably can give you 10% pa.