What best describes an asset's "alpha"? The part of the average expected return (in excess of the riskfree rate) that cannot be explained by covariation with the return on a benchmark porfolio O Correlation between an asset's return and the return on the S&P 500 index The return on an asset (in excess of the riskfree rate) over and above the returns on the Fama-French factor portfolios The return on an asset (in excess of the riskfree rate) over and above the returns on the CRSP Value-Weighted Portfolio