Question 1: Suppose you own $1 million worth of 30-year Treasury bonds. Is this asset riskless?
Question 2: You own $1 million worth of 90-day Treasury bills. You "roll over" this investment every 90 days by reinvesting the proceeds in another issue of 90-day Treasury bills. Is this investment riskless?
Question 3: Can you think of an asset that is truly riskless?