Given:
average inflation rate: 2.7%
average t-bill rate: 5.4%
returns
17%
- 4%
20%
12%
10%
Average returns = (17% - 4% + 20% + 12% + 10%) / 5 = 11%
Average real risk-free rate using the Fisher equation.
The average real risk-free rate was: (1 +R) = (1 +r)(1 +h)
f = (1.054/1.027) – 1
f = 1.0263 - 1
f = 0.0263 or 2.63%
The average real risk-free rate over this time period is 2.63%