A study of 17,000 stock mutual fund share classes by Standard & Poor’s, determined that fund expenses are a critical factor in fund performance.

The study found that over a ten-year period, stock funds with lower than average expense ratios performed better than funds with higher than average expense ratios in all investment style categories except one. The exception was the mid-cap blend category.

It is important for you to keep fund expenses in the forefront of your analysis when selecting funds for your portfolio.