Investing in Index Funds. Vanguard’s John Bogle February 13, 2018 admin Investor Education, Long Term Investing Comments Off on Investing in Index Funds. Vanguard’s John Bogle Why Invest in Index Funds? Vanguard’s John Bogle Explains Get our FREE Newsletter! Discover Stocks with +1,000% Upside Potential! Thank you for subscribing. Something went wrong. Join over 100,000 investors and business leaders worldwide. Discover the Next Super Stock before the rest of the crowd. Your privacy is our priority. Your email address will never be sold or shared with anyone else.