How Expense Ratios & Star Ratings Predict Success, Russell Kinnel, Morningstar, 17-08-10. Mm.: "If there's anything in the whole world of mutual funds that you can take to the bank, it's that expense ratios help you make a better decision. In every single time period and data point tested, low-cost funds beat high-cost funds. ... In every asset class over every time period, the cheapest quintile produced higher total returns than the most expensive quintile. ... Investors should make expense ratios a primary test in fund selection. They are still the most dependable predictor of performance."
