46 firms accounted for half the wealth generated by the stock market over the past 100 years, researchers say

In recent years, stock market observers have noticed that a small group of mega-sized technology stocks, nicknamed the " Magnificent Seven ," have driven an outsized portion of the return in the broad stock market. A decade ago, it was FANGs (Facebook, Amazon, Netflix and Google — sometimes, Apple too) leading the charge. These cadres tend to make headlines because they go against the idea that the stock market is a rising tide that, over time, lifts all boats. …