I want to calculate annual excess returns on portfolios using monthly returns for a CAPM (for the assets in the portfolio as well as for the benchmark), in order to have more information on the correlations, more precise betas.
I want to use the right benchmark for all this.
Many holdings are diversified internationally, but not completely, esp. not into emerging markets (over 1999-2007). Is it appealing to use an MSCI all-world benchmark (viz. MSCI ACWI IMI GR USD converted into SEK) as people "should" have diversified, so all extra risk is, well, extra? Or it makes much more sense to compare everything to an MSCI World ( developed markets only) benchmark?
Full disclosure: This breaks down my longer question into specifics. Please bear with me. From: annual excess returns from CAPM on monthly total returns