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After peaks in S&P 500® concentration, the S&P 500 Equal Weight Index has tended to outperform, suggesting that there is a relationship between changes in concentration and the relative performance of equal weighting. But, does this relationship also occur at the sector level? Using the historical adjusted HHI (Herfindahl-Hirschman Index), we’ve previously established that concentration…
After the exceptional performance of large-cap stocks in recent years, concentration concerns naturally come to mind. There are many ways to measure concentration. A simple method is to add up the weight of the top names, but the drawback with this approach is it doesn’t incorporate all the constituents in an index. The Herfindahl-Hirschman Index…
