The death of John Bogle has been announced at the age of 89. He wrote several very informative books on investment and was the founder of Vanguard which has grown into one of the largest mutual fund managers by promoting index fund management. He also promoted the idea that the investors should own the fund manager. He suffered from heart attacks from a young age, the first at age 31, and actually had a heart transplant in 1990. So in some ...