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 Did you enjoy this article? Join our FREE Newsletter! I agree to have my personal information transfered to MailChimp ( more information ) Join over 100,000 investors and business leaders worldwide. Get the latest actionable business and investing intelligence before the rest of the crowd.We hate spam. Your email address will not be sold or shared with anyone else.