Whereas German By Marks had expected the real interest rate to be 6%, it actually turned out to be 8%, 2% more than he expected.
Cost of government bond purchased = $200
Principal and interest after one year = $218
Interest rate = 9% ($18/$200 x 100)
Consumer price index (CPI) at the beginning of year 1 = 300
Actual CPI at the end of year 1 = 324
Expected CPI at the end of year 1 = 318
Expected real interest rate = 6% (18/300 x 100)
Actual real interest rate = 8% (24/300 x 100)
The real interest rate refers to the interest rate that has removed the effects of inflation. It is unlike the nominal interest rate, which is the rate before inflation adjustment. As a result, the nominal interest rate is known to be higher than the real interest rate.
Thus, whereas German By Marks had expected the real interest rate to be 6% but it actually turned out to be 8%.
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