Return on equity should double in the next decade to around 7 percent, Vanguard Group founder Jack Bogle told CNBC Monday.
Dividend yields average a little over 2 percent, he explained. "We know corporate earnings grow at the rate of America, the rate of our (gross domestic product)," which he sees at 5 percent by decade's end. That would make for a 7 percent return on stocks, which he called a "reasonable expectation."
"That would mean you’ve doubled your money in the decade," he said.