While there is a broad subset of academic literature that supports Quality as a source of structural alpha, it was excluded from my original "5 Ways to Beat the Market". Quality seems like a much more subjective selection methodology as compared to analytically derived Low Volatility or the rules-based Dividend Aristocrats.
Since this is a series on factor tilts or alternative weighting schema, I do like that there is an available S&P 500 Quality Index, that selects S&P 500 constituents based on a screen for Quality. Comparing constituents derived from the broad index versus that