Answer:
APY = 4.0474%
Step-by-step explanation:
Given is the Annual Percentage Rate (APR) = 3.9742% compounded monthly.
Suppose Principal amount, P = $1.
time, t = 1 year.
interest rate, r = 3.9742% = 0.039742
period of compounding, n = 12 (for monthly).
Future value = P * (1 + r/n)^(nt)
FV = 1 * (1 + 0.039742/12)^(1*12) = 1.040473955
Annual Percentage Growth = (FV/P)*100 = (1.040473955 / 1) * 100 = 4.0473955%
Hence, Annual Percentage Yield (APY) = 4.0474%