Over the past 90 or so years, the variability (standard deviation) of average annual rates of return in the U.S. have been lowest for which of the following securities?

Over the past 90 or so years, the variability (standard deviation) of average annual rates of return in the U.S. have been lowest for which of the following securities?


a. Five-year government bonds

b. Twenty-year corporate bonds

c. Large-company stocks

d. Small-company stocks


Answer: Five-year government bonds


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