Savings

cashflows.savings.savings(deposits, nrate, initbal=0, noprint=True)[source]

Computes the final balance for a savings account with arbitrary deposits and withdrawls and variable interset rate.

Parameters:
  • deposits (TimeSeries) – deposits to the account.
  • nrate (TimeSeries) – nominal interest rate paid by the account.
  • initbal (float) – initial balance of the account.
  • noprint (bool) – prints summary report?
Returns:

interest, end_balance (TimeSeries, TimeSeries)

Examples

>>> cflo = cashflow(const_value=[100] * 12, pyr=4)
>>> nrate = interest_rate([10] * 12, pyr=4)
>>> savings(deposits=cflo, nrate=nrate, initbal=0, noprint=False) 
t      Beginning   Deposit    Earned    Ending
         Balance            Interest   Balance
-----------------------------------------------
(0, 0)      0.00    100.00      0.00    100.00
(0, 1)    100.00    100.00      2.50    202.50
(0, 2)    202.50    100.00      5.06    307.56
(0, 3)    307.56    100.00      7.69    415.25
(1, 0)    415.25    100.00     10.38    525.63
(1, 1)    525.63    100.00     13.14    638.77
(1, 2)    638.77    100.00     15.97    754.74
(1, 3)    754.74    100.00     18.87    873.61
(2, 0)    873.61    100.00     21.84    995.45
(2, 1)    995.45    100.00     24.89   1120.34
(2, 2)   1120.34    100.00     28.01   1248.35
(2, 3)   1248.35    100.00     31.21   1379.56

>>> cflo = cashflow(const_value=[100] * 5, spec=[(0, 0), (2, 0)])
>>> nrate = interest_rate([0, 1, 2, 3, 4])
>>> savings(deposits=cflo, nrate=nrate, initbal=1000, noprint=False) 
t    Beginning   Deposit    Earned    Ending
       Balance            Interest   Balance
---------------------------------------------
(0,)   1000.00      0.00      0.00   1000.00
(1,)   1000.00    100.00     10.00   1110.00
(2,)   1110.00      0.00     22.20   1132.20
(3,)   1132.20    100.00     33.97   1266.17
(4,)   1266.17    100.00     50.65   1416.81