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I can't quite tell if you're talking nominal or real rate of return. Supposedly (though I have my doubts as noted above) the 8.9% objective is real return.In addition, I looked through my stack of funds; and, I have two that bettered the 8.9% objective over a ten year period. They were FDSAX and SPECX. However, remember the 2007 and 2008 returns from the Great Recession that brought the average down will soon be coming off at the end of next year. My broker has the thinking that a balanced portfolio will return somewhere between 6% to 8% on average over the next ten year period depending on it's equity allocation and positioning. He is not looking for great things from bonds.
I think what the article was trying to establish is that market returns are not going to meat investor expectations.
I wish all ... "Good Investing."
Old_Skeet

(M*'s XLY's NAV figure for Sept looked way off; I used price performance here.)
Month XLP XLY S&P
Sept -0.64 0.82
Aug -1.06 -1.84 0.36
July 0.66 1.86 2.06
June -2.28 -1.21 0.62
May 2.70 1.11 1.41
Apr 1.05 2.42 1.03
Mar -0.40 2.04 0.12
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