posted by Ken .
A bank offers your firm a revolving credit arrangement for up to $85 million at an interest rate of 2.5 percent per quarter. The bank also requires you to maintain a compensating balance of 4 percent against the unused portion of the credit line, to be deposited in a non-interest-bearing account. Assume you have a short-term investment account at the bank that pays 10 percent per quarter, and assume that the bank uses compound interest on its revolving credit loans.
Your effective annual interest rate (an opportunity cost) on the revolving credit arrangement if your firm does not use it during the year is percent
The way I was taught to do this was
1.7^3-1 which would equal 39.13. That is not the answer. Is 1.7 not the number used?