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DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R The Time Value of Money Emily Riederer Instructor DataCamp Financial Analytics in R Intuition DataCamp Financial Analytics in R An Example Suppose that: You owe me $100 I can

  1. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R The Time Value of Money Emily Riederer Instructor

  2. DataCamp Financial Analytics in R Intuition

  3. DataCamp Financial Analytics in R An Example Suppose that: You owe me $100 I can invest any cash I have with a 10% annual growth rate Then I am ambivalent between getting paid certain values at certain points in time: Time (Years) Computation Value ($) 0 100 1 100 × (1 + 0.1) 110 2 110 × (1 + 0.1) = 100 × (1 + 0.1)^2 121

  4. DataCamp Financial Analytics in R Definitions Present value (PV) : The value of a cashflow as if I were receiving it today Future value (FV) : The stated value of a cashflow at the point I'm given it Time periods (n) : The amount of time in the future that I receive the future value Discount rate (r) : The interest rate at which I can invest cash that I have Time Computation Value 0 100 1 100 × (1 + 0.1) 110 2 110 × (1 + 0.1) = 100 × (1 + 0.1)^2 121

  5. DataCamp Financial Analytics in R Time Value of Money Equation Present value (PV) : The value of a cashflow as if I were receiving it today Future value (FV) : The stated value of a cashflow at the point I'm given it Time periods (n) : The amount of time in the future that I receive the future value Discount rate (r) : The interest rate at which I can invest cash that I have Time Computation Value 0 100 1 100 × (1 + 0.1) 110 2 110 × (1 + 0.1) = 100 × (1 + 0.1)^2 121 ... ... ... n PV × (1 + r)^n FV

  6. DataCamp Financial Analytics in R Time Value of Money Equation n Future Value: FV = PV ∗ (1 + r) n Present Value: PV = FV/(1 + r) In R fv <- pv * (1 + r)^n pv <- fv / (1 + r)^n # alternative: pv <- fv * (1 + r) ^ (-1 * n) In tidyverse library(dplyr) mutate(data, pv = fv / (1 + r)^n)

  7. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R Let's practice!

  8. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R Using Different Discount Rates Emily Riederer Instructor

  9. DataCamp Financial Analytics in R A rate conversion example Start Date: January 1 Initial investment: $100 Monthly Rate of Return: 1.00% Date t Calculation Future Value February 1 1 100 ∗ (1 + 0.01) 101 2 March 1 2 101 ∗ (1 + 0.01) = 100 ∗ (1 + 0.01) 102.1 3 April 1 3 102.1 ∗ (1 + 0.01) = 100 ∗ (1 + 0.01) 103.03 ... ... ... ... 12 January 1 12 100 ∗ (1 + 0.01) 112.68

  10. DataCamp Financial Analytics in R A rate conversion example (cont.) Date t Calculation Future Value February 1 1 100 ∗ (1 + 0.01) 101 2 March 1 2 101 ∗ (1 + 0.01) = 100 ∗ (1 + 0.01) 102.1 3 April 1 3 102.1 ∗ (1 + 0.01) = 100 ∗ (1 + 0.01) 103.03 ... ... ... ... 12 January 1 12 100 ∗ (1 + 0.01) 112.68 12 By extrapolation: 100 ∗ (1 + Monthly Rate) = 100 ∗ (1 + Annual Rate) 12 Conversion Formula: Annual Rate = [(1 + Monthly Rate) ] − 1

  11. DataCamp Financial Analytics in R The rate conversion formula r1: Discount rate (growth rate) measured per some unit of time r2: Discount rate (growth rate) measured per some other unit of time r2 = [(1 + r1)^(# r1 units / 1 r2 unit) ] - 1 r_quart <- (1 + r_mth)^3 - 1 r_quart <- (1 + r_ann)^(1/4) - 1

  12. DataCamp Financial Analytics in R Real versus Nominal Measures Cost/Purchasing Power Today: $50 Cost Tomorrow: $70 --> inflation; less purchasing power Cost Tomorrow: $30 --> deflation; more purchasing power

  13. DataCamp Financial Analytics in R Real versus Nominal Formulas r_real : Discount rate as measured in real dollars r_nominal : Discount rate as measured in inflation-adjusted dollars inflation_rate : Inflation rate r_real = (1 + r_nominal) / (1 + inflation_rate) − 1 r_nominal = (1 + r_real) * (1 + inflation_rate) − 1

  14. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R Let's practice!

  15. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R Discounting Multiple Cashflows Emily Riederer Instructor

  16. DataCamp Financial Analytics in R Streams of Cashflows (1)

  17. DataCamp Financial Analytics in R Streams of Cashflows (2)

  18. DataCamp Financial Analytics in R Stream of Cashflows (3) pv <- calc_pv(fv = 100, r = 0.01, n = 3) pv > [1] 97.05901 cashflows <- c(0, -50, 25, 100, 175, 250, 250) discounted_cashflows <- calc_pv(cashflows, r = 0.01, n = 0:6) discounted_cashflows > [1] 0.00000 -49.50495 24.50740 97.05901 168.17156 237.86642 235.51131 sum(discounted_cashflows) > [1] 713.6108

  19. DataCamp Financial Analytics in R Summarizing Multiple Cashflow Streams option time cashflow A 1 350 A 2 350 A 3 350 B 1 500 B 2 500 many_cashflows %>% group_by(option) %>% summarize( PV = sum(calc_pv(cashflow, 0.08, n = time)) option PV A 901.9839 B 891.6324

  20. DataCamp Financial Analytics in R FINANCIAL ANALYTICS IN R Let's practice!

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