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This comprehensive analysis explores the total mortgage market, focusing on the breakdown of major mortgage originators and the differences between Fixed Rate Mortgages (FRMs) and Adjustable Rate Mortgages (ARMs). It includes examples of ARM terms, historical variations in base rates, yields, and detailed cash flow calculations. Additionally, we discuss useful mortgage formulas and the impact of federal agencies on the mortgage market, including their role and borrowing costs in capital markets.
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Mortgages & Agencies Topic 10
Useful Mortgage Formulas -- Cash Flow Calculations Source: Lakhbir Hayre, CITIGROUP G: Monthly coupon (6% annual implies G=0.06/12=0.0050). U: Discount factor: U=1/(1+G)=1/1.005=0.995025 N=Original term of mortgage loan in months (e.g. N=360). n=Age of loan in months. R=N-n=remaining loan term in months.
Useful Mortgage Formulas -- Cash Flow Calculations No prepayments