Independent solution

How to solve this Loan Amortization question

Setup

Setup

Treat each quarter as one loan-payment period and solve its effective rate first.

5000=291.23a20iq5000=291.23a_{\overline{20}|\,i_q}

Model

Model

The twenty-payment annuity equation has periodic rate 1.5%.

iq=0.015i_q=0.015

Compute

Compute

Three monthly factors must reproduce the quarterly factor; converting the resulting monthly rate to a nominal annual quote gives 0.059703.

(1+j12)3=1.015,j=0.059703\left(1+\frac{j}{12}\right)^3=1.015,\qquad j=0.059703

Answer

Answer

The nominal annual rate convertible monthly is 5.97%, corresponding to choice A.

j5.97%(A)\boxed{j\approx5.97\%\quad\text{(A)}}

Calculator reproduction

BA II Plus keystrokes

Check END/BGN, period, sign, TVM, and cash-flow setup

  1. 2nd CLR TVM; 20 N; 5000 PV; 291.23 +/- PMT; 0 FV; CPT I/YI/Y = 1.5000The displayed I/Y is the effective rate per quarter. Convert its three-month factor to a monthly rate, then multiply by 12.