Buyer Beware: Calculating the Annual Interest Rate on Monthly Payments | CFA Level 1 Exam Prep

Calculating Annual Interest Rate for Monthly Payments | CFA Level 1 Exam Prep

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Question

If you buy an item for $475 and agree to pay for it with 24 monthly payments of $22.50, beginning next month, what annual interest rate, compounded monthly, are you being charged?

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A. B. C. D. E.

C

The interest rate returned by the calculator will be the periodic interest rate. It must be multiplied by the number of periods per year to have the correct answer. On the BAII Plus, press 24 N, 475 PV, 22.50 +/- PMT, 0 FV, CPT I/Y. Then press x 12 = to see the answer. On the HP12C, press 24 n, 475 PV, 22.50 CHS PMT, 0

FV, i. Then press 12 x to see the answer. Make sure the BAII Plus has the P/Y value set to 1.