Consider historical data showing that the average annual rate ofreturn on the S&P 500 portfolio over the past 85 years hasaveraged roughly 8% more than the Treasury bill return and that theS&am Consider historical data showing that the average annual rate of return on the S\&P 500 portfolio over the past 85 years has averaged roughly \( 8 \% \) more than the Treasury bill return and that the 2 answers