Properties of the ten largest groups obtained from clustering the similarity network with 100,161 investors.

Investors shows the number of investors in the group. Mean stocks reports the mean number of portfolio holdings for the investors in the group. Significant set size states the set size that is needed for trading significance, i.e., the number of investors that are needed so that 95% of the trading comparisons are larger within the group than outside. Top stocks shows the stocks held by most investors in the group and the corresponding proportion of investors in the group that hold the stock.