The National Association of Insurance Commissioners recently proposed changes to modeling values of insurance company holdings of non-agency MBS and commercial MBS. The proposal could increase loss forecasts and prompt some sales of the securities, according to analysts. The NAIC proposed using the Treasury strip curve as the discount rate in determining the net-present value of expected loss for modeled securities, as opposed to using each security’s coupon rate to determine expected losses. The standard-setting group governed by state insurance regulators noted that the Treasury strip curve is a risk-free curve. “Using a consistent risk-free rate for all modeled securities in calculating the expected loss reflects...