The 5 keys to picking the right funds: Jack Bogle By: CNBC.com News May 26, 2015 at 08:30 AM EDT Jack Bogle, Vanguard's founder, identifies the tenets of mutual fund investing. He advises: Look for hidden fees, high ratings and low expense ratios. Read More >> Related Stocks: JPMorgan Chase & Co S&P 500 Growth ETF Vanguard T.Rowe Price Group