As you may not want to lend your money below a certain percentage, this rule allows you to specify an interest rate range for the loans you want to invest in. Please note: This is not mandatory.
If you set this rule, keep an eye on the Portfolio Summary section on the right-hand side of your page, as the number of available loans per month could fall sharply. The higher the interest rate, the fewer loans will be available, and the fewer investments will be made over time. If you feel that not enough loans are available, you might want to consider changing the interest rate criteria.