you have a $300,000 30-year FRM at 3.5% and can refinance it at 3%. Assuming refinancing costs are $7,000, how long would you need to stay in your home to make the payment savings worthwhile? 75 months 95 months 05 months 105 months QUESTION 20 If I bought an MBS with a CPR of 52.41 at a 4% discount, what is my approximate P&L impact? 14 cent loss 24 cent loss 14 cent gain 24 cent gain 30x40