Potential investors in non-agency MBS are calling for significant changes to the market before they’re willing to resume investing in new non-agency MBS. Non-agency MBS issuers indicate that they are willing to make some changes to attract investors, while other adjustments will require action by federal regulators or Congress. In June, the Treasury Department requested comments on how to increase non-agency activity and decrease the agency MBS share of mortgage financing. The comment period closed late last week, with about 25 industry participants submitting feedback. John Gidman, president of the Association of Institutional Investors, said...