We report betas of 1,385 US companies on March 31, 2014, calculated with the S&P500. We calculate 147 betas for each company using monthly, weekly and daily returns and using different intervals: from a year to five years. The average (median) of the difference [maximum beta - minimum beta] was...

The Market Portfolio is not an efficient portfolio. There are many evidences that tell us that: the equal weighted indexes have beaten their market-value weighted indexes for many years, many easy-to-build portfolios (some “smart-beta”, “multifactors”) have beaten market-value weighted...