Which of these correctly describe the returns on long-term Treasury bonds for the period 1950-2012? Select all that apply. Check all that apply. More volatile than T-bill returns on an annual basis More volatile than S&P 500 returns over the period Higher returns than S&P 500 returns over the period Higher returns than T-bill returns over the period Do you know the answer? Read about this I know it Think so Unsure No idea