# Fight Finance

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What is the NPV of the following series of cash flows when the discount rate is 10% given as an effective annual rate?

The first payment of \$90 is in 3 years, followed by payments every 6 months in perpetuity after that which shrink by 3% every 6 months. That is, the growth rate every 6 months is actually negative 3%, given as an effective 6 month rate. So the payment at $t=3.5$ years will be $90(1-0.03)^1=87.3$, and so on.