Quoting Conventions

APR =  annual percentage rate
    (periods in year) X (rate for period)
EAR = effective annual rate
    ( 1+ rate for period)^Periods per yr - 1
Example: monthly return of 1%
    APR = 1% X 12 = 12%
    EAR = (1.01)^12 - 1 = 12.68%