With the low rate environment and permittance of negative rates in some interest rate models, we’ve received inquiries on both allowing and constraining negative rates in security valuation. For CMO floaters with embedded caps and floors, users can toggle our Ignore Index Cap/Floor field to allow index rates to go beyond any preset cap or floor. For Mortgage Servicing Rights, clients can optionally impose a floor on all floating servicing cash flow strips including T&I and P&I Float. In Scenario Analysis, our Floor Negative Rates option supports both non-negative and negative floors. Please reach out to us at support@polypaths.com for any help in restricting or relaxing negative rates as part of your analysis.