net worth The term economic net worth means the current cash available to the account of the Fund that is established pursuant to subsection (a)(1) of this section, plus the net present value of all future cash inflows and outflows expected to result from outstanding new business. (4) Fund The term Fund means the Mutual Mortgage Insurance Fund established under section 205 of the National Housing Act ( 12 U.S.C. 1711 ). (5) New business The term new business means mortgages that are obligations of the Mutual Mortgage Insurance Fund that become insured by the FHA after the expiration of the transition period under section 551. (6) Unamortized insurance in force The term unamortized insurance-in-force means the remaining obligation on outstanding new business, as estimated by the FHA. (d) Treatment of existing capital ratio Paragraph (4) of section 205(f) of the National Housing Act ( 12 U.S.C. 1711(f)(4) ) is amended— (1) in subparagraph (A), by striking Mutual Mortgage Insurance Fund and inserting account of the Mutual Mortgage Insurance Fund that is established pursuant to section 216(a)(2) of the Protecting American Taxpayers and Homeowners Act of 2018