Problem: You read in the Wall Street Journal that 30-day T-bills are currently yielding 5.55. your brother-in-law, a broker at Safe and Sound Securities, has given you the following estimates of current interest rate premiums:
Inflation premium=3.25%
Liquidity premium=0.6%
Maturity risk premium=1.8%
Default risk premium=2.15%
On the basis of these data, what is the real risk-free rate of return?