R enters a repo agreement as follows – sell £4M (nominal) UK Treasury Bills for £3.94M – but then back 45 days later for £3.96M Determine the effective interest rate Solution: ( 0.02/3.94 ) x 365 / 45 = 4.11%
Please can you explain why we multiply by 365 and divide by 45 days and not the other way around as I thought.
Because the interest of 0.02/2.94 is the interest over the 45 days. Given that there are 365 days in a year, the effective yearly interest rate is got by multiplying by 365/45.